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WO2016010361A1 - Moteur à réluctance commuté - Google Patents

Moteur à réluctance commuté Download PDF

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Publication number
WO2016010361A1
WO2016010361A1 PCT/KR2015/007345 KR2015007345W WO2016010361A1 WO 2016010361 A1 WO2016010361 A1 WO 2016010361A1 KR 2015007345 W KR2015007345 W KR 2015007345W WO 2016010361 A1 WO2016010361 A1 WO 2016010361A1
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WO
WIPO (PCT)
Prior art keywords
rotor
pole
stator
poles
convex
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Application number
PCT/KR2015/007345
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English (en)
Korean (ko)
Inventor
정영춘
Original Assignee
주식회사 에스엔이노베이션
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Publication of WO2016010361A1 publication Critical patent/WO2016010361A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/04—Synchronous motors for single-phase current
    • H02K19/06—Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/18—Synchronous generators having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generators
    • H02K19/20—Synchronous generators having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar generators with variable-reluctance soft-iron rotors without winding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/22—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators
    • H02K19/24—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators with variable-reluctance soft-iron rotors without winding

Definitions

  • the present invention consists of a stator pole and a rotor pole facing the stator pole, which are excited by an excitation coil, each having a two-stage diameter by a step, thereby reducing torque ripple and vibration noise and improving torque efficiency.
  • a switched reluctance motor To a switched reluctance motor.
  • Switched Reluctance Motor has a simple structure that does not need brush by winding the excitation coil only on the stator and the rotor by iron core without any excitation means (excitation coil or permanent magnet). . Accordingly, switched reluctance motors are easy to manufacture, robust, relatively reliable compared to other motors, and excellent in price competitiveness, and thus are of interest in various applications.
  • FIG. 1 is a cross-sectional view of a conventional single phase switched reluctance motor.
  • a typical conventional single phase switched reluctance motor is opposed to each other with a constant air gap in the basic structure of a general motor in which a rotor can be freely rotated inside a stator.
  • the salient poles 11 and 21 are formed on the stator 20 and the rotor 10 to have a double salient pole structure.
  • the excitation coil 22 is wound around the protrusion 12 of the stator 20.
  • FIG. 2 Inductance and torque formed according to the rotation angle (rotation position) of the rotor in the single-phase switched reluctance motor configured as described above are shown in FIG. 2.
  • the inductance for the counterclockwise rotation angle of the rotor starts to increase at the rotation angle ⁇ s at the time when the rotor salient pole 11 and the stator salient pole 21 start to face each other and the rotor starts to increase.
  • the maximum Lmax is obtained at a time point ⁇ 1 to ⁇ 2 at which the salient poles 11 and the stator salient poles 21 are aligned, and then gradually decrease to decrease between the rotor salient poles 11 and the stator salient poles 21.
  • the inductance is maximized at, the inductance is almost uniform up to the predetermined forward and backward rotation angles ⁇ 1 and ⁇ 2 based on the rotation angles to be aligned, and thus the alignment positions are represented by the intervals ⁇ 1 to ⁇ 2.
  • the sections ⁇ 1 to ⁇ 2 arranged in this manner are referred to as starting dead points.
  • the positive torque Tmax is generated in the sections ⁇ s to ⁇ 1 where the inductance increases, and the negative torque (-Tmax) occurs in the sections ⁇ 2 to ⁇ 3 where the inductance decreases. That is, when the stator poles are excited, the rotor receives a reluctance torque in the direction of increasing inductance and rotates to reach a position where the stator poles and the rotor poles are aligned.
  • the negative torque occurs afterwards, so that the voltage applied to the excitation coil is cut off before the alignment position ( ⁇ 1 ⁇ ⁇ 2) and the next reluctance increase period ( ⁇ s ⁇ ⁇ 1) or before the excitation coil.
  • the voltage is applied to make the one-way rotational torque continuous.
  • an encoder for detecting the rotational position of the rotor is installed, and the energization section ( ⁇ on- ⁇ off) corresponding to the section ( ⁇ s ⁇ ⁇ 1) where the inductance increases )
  • a power supply means having a switching element for energizing or interrupting the voltage in the excitation coil 22 it is possible to construct a switched reluctance motor in which the rotor rotates in one direction by the constant torque.
  • the excitation conduction section ⁇ on- ⁇ off for applying a voltage to the excitation coil takes into account the magnitude of the inductance L of the excitation coil 22 and the decay time of the magnetic induction current of the excitation coil 22 generated when the excitation voltage is turned off. To correspond to the position of the inductance increasing section ⁇ s to ⁇ 1 according to the control range of the rated torque.
  • the core including dolgeuk to flow through the rotor dolgeuk amount is large magnetic flux is not saturated in order to increase the space factor of the slot increasing the maximum inductance, in general, polar firing angle ( ⁇ of the rotor dolgeuk (11) r, The arc angle is designed to be larger than the polar angle ⁇ s of the stator protrusion 21.
  • the switched reluctance motor rotates by generating a positive torque only in the inductance increase period ( ⁇ s ⁇ ⁇ 1) and generates a negative torque after the alignment position ( ⁇ 1 ⁇ ⁇ 2).
  • Ripple and mechanical vibration noise are generated. That is, when looking at the current waveform shown in FIG. 2, as the voltage is initially applied to the excitation coil, a current is initially increased and then a flat-topped phase current flows. , Cogging and torque shock occurs in the section where the current is rapidly increased and the section is sharply demagnetized. As a result, the noise becomes louder and the unnecessary power loss becomes larger, resulting in lower efficiency.
  • Korean Patent Laid-Open Publication No. 10-2014-0073395 proposes a design criterion of the polar angle ( ⁇ r , ⁇ s ) for the rotor protrusion and the stator protrusion.
  • the inductance increase section ( ⁇ s ⁇ ) is used because the portion formed lower by the step or the portion in which the through hole is formed approaches the stator pole. Only at the moment of entering or ending ⁇ 1), the torque fluctuation still occurs largely by only partially reducing the torque fluctuation amount.
  • the switched reluctance motor of the outer rotor method is structurally different from the inner rotor method since the salient pole excited by the excitation coil is formed on the inner stator.
  • Korean Patent Laid-Open Publication No. 10-2012-0134984 there have been studies to reduce the core loss caused by the short magnetic flux path and to improve the torque characteristics.
  • no prior art literature or known art has been searched for magnetic reluctance and inductance combinations and polar angles of double stepped salient poles to reduce torque ripple and maximize torque.
  • the present inventors have filed a patent application as a Korean patent application No. 10-2013-0112470 by inventing an outer ring rotor that reduces torque ripple and maximizes torque, and in the present invention, the motor comprising the stator and the outer ring rotor for improved performance It starts.
  • Patent Document 1 KR 10-0677285 A 2007.01.26.
  • Patent Document 2 KR 10-2014-0073395 A 2014.06.16.
  • Patent Document 3 KR 10-2012-0134984 A1 2012.12.12.
  • an object of the present invention is to smoothly change the inductance and minimize the protrusion of the protrusion to reduce mechanical magnetic vibration and rotational torque ripple due to discontinuous torque changes and impacts, to minimize the non-excitation section and to increase the effective torque effective angle as much as possible. It is to provide a switched reluctance motor of the outer ring rotor type.
  • the inner surface of the rotor (100) forming a magnetic circuit (magnetic circuit) between the plurality of rotor poles 110 formed in the radially equidistant along the circumferential direction; It is fixed to the inside of the rotor, winding the excitation coil 214 to a plurality of stator poles 210 formed in the circumferential direction on the outer surface to form a magnetic path between each other, at least a pair of stator poles 210 is air gap Stators 200 aligned at the same time one by one on different rotor poles 110 with the gaps therebetween; A rotation position sensor 300 for detecting a rotation position of the rotor 100; In the switched reluctance motor comprising a; and a controller 400 for applying a voltage to the excitation coil 214 in the excitation conduction period ( ⁇ on- ⁇ off) preset to correspond to the inductance increase interval to generate a positive torque,
  • the rotor poles 110 and the stator poles 210 are divided into convex poles 111 and 211 and concave poles 112 and 211 having different heights, respectively, having steps 113 and 213 formed therebetween, and aligned with each other.
  • the excitation conduction section is set to correspond to an inductance increase section formed between the stator convex pole 111 and the stator convex pole 211, and a voltage is applied to the excitation coil 214 in the set excitation conduction section ⁇ on- ⁇ off.
  • the rotor 100 includes a pitch hole 120 having a groove shape at a boundary between the rotor poles 110 so that the plurality of rotor poles 110 are formed by being separated by the pitch hole 120. It features.
  • stator convex pole 211 begins to face the rotor convex pole 111 of any one of the rotor poles 110 and the area of the facing surface increases, the stator concave pole 212 becomes a pitch hole ( The area of the surface facing the rotor convex pole 111 of the other rotor pole 110 adjacent to the boundary 120 is reduced.
  • Steps 113 and 213 of the rotor pole 110 and the stator pole 210 are characterized by being inclined downward from the convex poles 111 and 211 toward the concave poles 112 and 211, respectively.
  • Steps 113 and 213 of the rotor pole 110 and the stator pole 210 are formed in the center of the rotor pole 110 and the stator pole 210, respectively.
  • the circumferential width of the inlet of the pitch hole 120 is the same as the transverse width of the step 213 of the stator pole 210.
  • Steps 113 and 213 of the rotor pole 110 and the stator pole 210 are 1 to 5 times larger than the gap G1 when the rotor convex pole 111 and the stator convex pole 211 are aligned. It is done.
  • the inclination angle of the steps 113 and 213 is characterized in that 30 ⁇ 60 °.
  • stator poles 210 provided in pairs are simultaneously aligned with different rotor poles 110, and the controller 400 simultaneously excites each stator pole 210 excitation coil 214, thereby providing a single phase switched release. It is characterized by operating as a traction motor.
  • the number of the rotor poles 110 of the rotor 100 is 2n + 2, n is a natural number, the stator 200 is aligned to the rotor poles 110 at the same time Steps of two rotor poles 110 having 2n stator poles 210 and not aligned with the stator poles 210 when the stator poles 210 are aligned with the rotor poles 110. 113 and two moving poles 220 facing one by one and the starting pole exciting coil 221 is wound.
  • the controller 400 has a rotor in the energizing section ( ⁇ on- ⁇ off) when the motor is started.
  • the motor is applied to the stator pole excitation coil in accordance with the excitation conduction section ( ⁇ on- ⁇ off) detected by the rotation position sensor 300, and the rotor is started when the motor is started.
  • Female rotor during repeated operation and the operation of the stator pole woman to woman, depending on the group donggeuk call is characterized in that the retry the start-up period at the time be in conduction ( ⁇ on- ⁇ off).
  • the rotor 100 is provided with a permanent magnet 130 that is mounted to each of the two rotor concave poles 112 of the plurality of rotor concave poles when k is a natural number.
  • the permanent magnet 130 is mounted to the rotor concave pole 112 to be biased in the pitch hole 120, k permanent magnets 130 and the remaining k permanent magnets 130 to the inside with different polarities It is characterized in that it is mounted facing.
  • the permanent magnet 130 is characterized in that it is mounted in close contact with the circumferential side of the rotor convex pole 111 across the inlet of the pitch hole (120).
  • the permanent magnet 130 is formed in an arc shape having a polar angle ( ⁇ m ) of 1/5 times to 2/3 times the polar angle ( ⁇ rc ) of the rotor concave pole 112 to concave the outer surface of the rotor. It is characterized in that it is mounted in close contact with the pole 112 and to maintain the void (G1).
  • the controller 400 applies a voltage to the stator pole exciting coil according to the energizing section ⁇ on- ⁇ off sensed by the rotation position sensor 300 when the rotor is in the energizing section ⁇ on- ⁇ off when the motor is started. If the rotor is not in the energizing section ( ⁇ on- ⁇ off) when the motor is started and the motor is started, it repeats the operation of exciting the starting pole according to the starting signal of the PWM waveform output from the microprocessor. It is characterized in that it starts when the self is in the excitation energization section ( ⁇ on- ⁇ off).
  • the present invention constituted as described above comprises a stator pole and a rotor pole facing the stator pole, which are excited by the excitation coil, each having a two-stage diameter by a step, and the convex pole of the stator pole and the convex pole of the rotor pole.
  • the increase in inductance formed between the poles with a positive slope not only excites the stator poles corresponding to the intervals, but also smoothes the inductance due to the magnetic reluctance damping effect through the gap between the stator concave pole and the rotor convex pole.
  • Torque torque by reducing torque ripple, minimizing protrusion of rotor protrusions to reduce vibration width, allowing concave poles to absorb the mechanical vibration of protrusions as much as possible, and generating reluctance torque with poles that maximize magnetic polar angle.
  • FIG. 1 is a cross-sectional view of a conventional single phase switched reluctance motor.
  • FIG. 2 is a graph illustrating a time chart showing variation of inductance, current, and torque in accordance with a rotor rotation angle of a conventional single-phase switched reluctance motor.
  • FIG. 3 is a cross-sectional view of a part in which a stator and a rotor are coupled in a switched reluctance motor according to a first embodiment of the present invention
  • FIG. 4 is an exploded cross-sectional view of the stator and the rotor.
  • FIG. 5 is a configuration diagram of a switched reluctance motor according to a first embodiment of the present invention, which is shown in a top view to show the installation position of the rotation position sensor 300;
  • FIG. 6 is a cross-sectional view showing the arrangement of the poles according to the rotation angle variation of the rotor.
  • FIG. 9 is a flowchart illustrating a start method by the control of the controller 400.
  • FIG. 10 is a cross-sectional view of a coupling between a stator and a rotor in a switched reluctance motor according to a second embodiment of the present invention.
  • FIG. 11 is a cross sectional view of a combination of a stator and a rotor in a switched reluctance motor according to a third embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of the stator and the rotor separated in the third embodiment of the present invention.
  • FIG. 13 is a top view showing an arrangement state between a stator convex pole and a permanent magnet according to a rotor position and an arrangement state between the rotation position sensor 300 and the reflector 310 in the third embodiment of the present invention.
  • FIG 14 is a graph showing the current waveform of the excitation coil in the switched reluctance motor according to the present invention.
  • Alignment is a state in which the centers of the faces of the rotor and the stator's poles (even convex or concave poles) coincide with each other to maximize the area of the opposite face.
  • the state where the center of the rotor pole is located in ⁇ 1 to ⁇ 2) is set to be aligned.
  • the range of rotation angles in the aligned state is referred to as alignment rotation angles ⁇ 1 to ⁇ 2.
  • Unaligned is the state where the poles of the rotor and stator (even convex or concave) do not coincide with each other, the pole center of the stator faces the center of the boundary between the rotor poles, and the misalignment between the convex poles.
  • the state means a state in which the convex pole center of the rotor faces the concave pole center of the stator.
  • the inductance increasing period ⁇ s to ⁇ 1 is a rotation angle section of the rotor from the time when the stator convex pole and the rotor convex pole start to face each other and are aligned, and the inductance slope is positive ( Appears as a +) interval. Therefore, in this section, the magnetic resistance between the stator convex pole and the rotor convex pole gradually decreases as the rotor rotates, and when the stator pole is excited with the excitation coil, the inductance gradually increases to generate static torque.
  • the magnetoresistance between the stator convex and the rotor concave, the magnetoresistance between the stator and the rotor convex, and the magnetoresistance between the stator and the rotor concave, respectively, decrease as they go from alignment to alignment. .
  • the inductance reduction section ⁇ 2 to ⁇ 3 is a rotation angle section in which the inductance decreases when the rotor rotation angle is changed after the alignment rotation angle ⁇ 1 to ⁇ 2. Negative torque in the direction of rotation is generated. In order to drive the rotation of the rotor, the voltage is not applied to the excitation coil in the inductance reduction section like the alignment rotation angle.
  • the inductance increase start point ⁇ s is a rotation angle at which the inductance increase periods ⁇ s to ⁇ 1 start, and is a time point at which the stator convex pole and the rotor convex pole start to face each other.
  • the inductance increase end point ⁇ 1 is a rotation angle at which the inductance increase periods ⁇ s to ⁇ 1 end, and corresponds to a position immediately before alignment.
  • the turn-on rotation angle ⁇ on is a rotation angle starting to supply electricity to the excitation coil, but may be adjusted to the inductance increase starting point ⁇ s but is generally set to be ahead of the inductance increase starting point ⁇ s to maximize the effective torque angle. . Therefore, in general, when the current flowing through the excitation coil at a predetermined voltage is sufficiently increased, the current does not increase any more in the inductance increase period and a flat-topped phase current flows to be balanced. However, the turn-on rotation angle ⁇ on is set in a range such that the initial current does not excessively increase even if it is set before the inductance increase start point ⁇ s or the rotor protrusion is not affected by the reverse reluctance torque of the previous stator protrusion. . If the turn-on rotation angle ⁇ on is behind the inductance increase section, the torque can be reduced and the speed can be controlled.
  • the turn-off rotation angle [theta] off is a time point at which electricity supplied to the excitation coil is cut off in accordance with the inductance increase end point [theta] 1.
  • the turn-off rotation angle [theta] off is set before the inductance increase end point [theta] 1.
  • This turn-off rotation angle is generally determined by the rotor position detection encoder in order to cause the magnetic induction electricity accumulated in the excitation coil to be dissipated at least before the end of the alignment rotation angles ⁇ 1 to ⁇ 2 so that the reverse torque is not affected. Otherwise, it is set programmatically.
  • the excitation conduction section ( ⁇ on- ⁇ off) is a rotation angle range for supplying electricity by applying a voltage to the excitation coil, and may be the same as the inductance increasing section ⁇ s to ⁇ 1, but as described above, in general, A flat-topped phase current is allowed to flow and it is slightly different from the inductance increase period ( ⁇ s ⁇ ⁇ 1) in consideration of the demagnetization characteristics of the excitation coil.
  • the actual excitation energization section may be defined as a section that is set in advance or programmatically to correspond to the inductance increase section to generate the positive torque.
  • the magnetic flux path is a closed circuit in which the magnetic flux flux circulates between the stator and the rotor with a gap between them.
  • the magnetic flux path is also used as a term for a part of a closed path.
  • magnetic flux paths between different stator poles formed by iron cores and magnetic flux paths between different rotor poles constitute a circumferential path that is connected to each other by voids.
  • 3 to 9 are diagrams for explaining a switched reluctance motor according to a first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a portion where the stator 200 and the rotor 100 are coupled
  • FIG. 4 is an exploded cross-sectional view of the stator 200 and the rotor 100
  • FIG. 5 is switched according to an embodiment of the present invention.
  • the top view is shown to show the installation position of the rotation position sensor 300.
  • FIG. 6 is a cross-sectional view showing the arrangement of the poles according to the rotation angle variation of the rotor 100
  • Figure 7 is a graph of the inductance according to the rotation angle variation of the rotor.
  • a switched reluctance motor includes a rotor 100, a stator 200, a rotation position sensor 300, and a controller 400. It consists of a single-phase switched reluctance motor with outer ring type, one-phase electric power and having an outer rotor type.
  • the rotor 100 is configured in a ring shape with an empty inside, and is capable of rotating about a linear axis of rotation passing through the center 230 of the stator 200, and based on the center of the stator 200. It has an inner surface for drawing a circle.
  • a plurality of rotor poles 110 are disposed on the inner surface of the rotor 100 at equal radial angles along the circumferential direction, and pitch holes 120 having grooves are formed at the boundary between the rotor poles 110. ), The plurality of rotor poles 110 can be divided by the pitch holes 120.
  • the rotor 100 may be composed of a ferromagnetic material assembled by stacking at least one or more electrical steel sheets, like a rotor of a general motor, for example, consisting of pure iron or silicon steel sheet or pure iron or silicon steel sheet It can consist of an alloy. Accordingly, the magnetic flux passage between the rotor poles 110 is formed by bypassing the pitch hole 120 to the outside. Of course, there is also a magnetic flux path passing through the pitch hole 120 between the rotor poles 110 adjacent to each other with the pitch hole 120 as a boundary, but the air layer by the pitch hole 120 has a relatively high magnetic resistance. As such, it can be seen that the magnetic flux passage is formed through a body made of ferromagnetic material.
  • each rotor pole 110 is divided into a rotor convex pole 111 and a rotor concave pole 112 having different heights by forming a step 113 on an inner surface thereof. That is, the rotor convex pole 111 and the rotor concave pole 112 are formed on concentric circles with different radii relative to the stator center 230, so that the inner surface of the rotor 100 is convex along the circumferential direction.
  • the poles 111 and the rotor concave poles 112 are alternately arranged.
  • the pitch hole 120 formed between the adjacent rotor poles 110 forms a boundary between the rotor concave pole 112 of one rotor pole and the rotor convex pole of the other rotor pole.
  • the inductance fluctuation with the stator convex pole 211 to be described later becomes apparent in the pitch hole 120. That is, the inductance fluctuation is made larger than when the pitch hole 120 is not provided, thereby increasing the reluctance torque.
  • the rotor 100 since the rotor 100 has a four-pole structure, four rotor poles 110 are disposed at equal intervals along the circumferential direction, and four pitch holes 120 are also formed at equal intervals.
  • the arc angle ⁇ r of the rotor pole 110 is slightly smaller than 2 ⁇ / 4 by the circumferential width D1 of the inlet of the pitch hole 120.
  • the step 113 is formed at the center of the inner surface of the rotor pole 110, thereby dividing the rotor pole 110 into the rotor convex pole 111 and the rotor concave pole 112.
  • the rotor 100 may be equipped with a flywheel (flywhee) for reducing the load torque ripple by increasing the rotational inertia or increase the weight for increasing the inertia of the outer ring rotor itself.
  • flywheel flywheel
  • the stator 200 is fixedly installed in the rotor 100 and has a plurality of stator poles 210 disposed along the circumferential direction on an outer surface facing the inner surface of the rotor 100.
  • the stator pole 210 is formed to protrude radially from the center of the rotor 100 on the rotation axis line as a reference point, between the inner surface and the air gap of the rotor 100.
  • the outer surface facing to the center draws an arc with respect to the center.
  • the stator 200 is a component that is fixedly installed so as not to rotate. Since the magnetic core of the stator has a magnetic flux passage and a volume such that the magnetic core does not saturate at the energetic output, the hole 230 is formed on the center corresponding to the volume more than necessary. It forms and fixed so that it may not rotate using this hole 230. FIG.
  • stator poles 210 are excited by the excitation coil 214 is wound to supply electricity to the excitation coil 214, it becomes magnetic, it is arranged in pairs stator poles 210 belonging to the same pair each other
  • the other rotor poles 110 are aligned at the same time one by one. Accordingly, at least one pair of stator poles 210 is provided in the stator 200, and only one pair of stator poles 210 is provided in the motor shown in FIGS. 3 to 5. At this time, since the stator pole 210 has a symmetrical structure with respect to the center 230, a rotation angle difference of 180 ° occurs between the stator poles 210.
  • the stator includes poles 210 and 220 arranged at equal radial angles (equal intervals in the circumferential direction) as many as the number of the rotor poles 110, but the center point is located along the rotation axis of the rotor.
  • the stator 200 has a conventional motor core material and a laminated structure like the rotor 100 to form a magnetic flux path between the stator poles 210 and a magnetic flux path between the moving poles 220.
  • stator poles 210 arranged in pairs are simultaneously misaligned even when they are simultaneously aligned and unaligned with the rotor poles 110.
  • the voltage is applied at the same time when the voltage is applied to the excitation coil 214 wound on each stator pole (210).
  • the moving poles 220 provided in pairs are steps of two rotor poles 110 that are left unaligned with the stator poles 210 when the stator poles 210 are aligned with the rotor poles 110. Face one-on-one with (113) one by one.
  • the stator pole 210 is divided into a stator convex pole 211 and a stator concave pole 212 having different heights, and the step 213 is a stator pole ( It is formed in the middle of the 210 is divided into a stator convex pole 211 and a stator concave pole (212).
  • the step 213 of the stator pole 210 has the same direction as the rotor pole 110 step 113 when the stator pole 110 is aligned with the rotor pole 110.
  • the rotor convex pole 111 and the stator concave pole 212 face each other with the gap between them, and the rotor concave pole 112 and the stator convex pole 211 face each other.
  • the polar angle ⁇ s of the stator pole 210 is the same as the polar angle ⁇ r of the rotor pole 110, but the Slightly larger than the polar angle ⁇ r , a portion of the rotor convex 111 faces or at least closes to the stator convex pole 211 when aligning the rotor pole 110 to the stator pole 210. In this case, even in an aligned state, the stator poles 210 can be excited to start a motor.
  • the movable pole 220 has a polar angle smaller than the polar angle ⁇ s of the stator pole 210 without forming a step, and when the stator pole 210 is aligned with the rotor pole 110, It has a polar angle that can face a portion of the rotor convex pole 111 and a portion of the rotor concave pole 112 that follow the step 113 of the opposite rotor pole 110.
  • the starting pole 220 formed as described above generates a reluctance torque to be aligned with the rotor convex pole 111 when excited by the starting pole exciting coil 221.
  • Steps 113 and 213 formed in the rotor pole 110 and the stator pole 210 and the pitch holes 120 formed in the rotor pole 110 will be described in more detail with reference to FIG. 4. .
  • the height H of the step 113 of the rotor pole 110 and the height h of the step 213 of the stator pole 210 are the rotor convex pole 111 and the stator convex pole. It was set to 1 to 5 times the air gap when (211) was aligned. This is due to the influence of the stator concave pole 212 and the two-stage structure facing the stator pole 210 when the electricity is supplied to the excitation coil 214 of the stator pole 210 like the stator convex pole 211. This is to reduce the torque ripple while generating sufficient torque reflecting the influence of the rotor pole (110). This will be described below with reference to FIGS. 6 and 7.
  • the height H of the step 113 of the rotor pole 110 and the height h of the step 213 of the stator pole 210 may have different values, but may have the same value. have.
  • the step 113 of the rotor pole 110 is formed to be inclined downward from the rotor convex pole 111 toward the rotor concave pole 112, and the step 213 of the stator pole 210 is also stator convex pole. It is formed inclined downward toward the stator concave pole 212 at (211).
  • the downward inclination-angle R at this time was 30 degrees-60 degrees.
  • the stator convex pole 211 and the rotor convex pole 111 may not only cause reverse torque at the turn-on rotation angle ⁇ s but also increase windage loss. Is preferred.
  • the inclination angle R of the step 113 of the rotor pole 110 and the inclination angle r of the step 213 of the stator pole 210 are the same, so that the stator pole 210 of the stator pole 210 is the same. It is good to make parallel between the steps (113, 213) when aligning.
  • the circumferential width D1 of the inlet of the pitch hole 120 is relatively small compared to the rotor convex pole 111 and the rotor concave pole 112. Accordingly, when the stator convex pole 211 begins to face the rotor convex pole 111 of any one rotor pole 110, the stator concave pole 212 is adjacent to the pitch hole 120 bordering. It is switched to an unaligned state in a state aligned with the rotor convex pole 111 of the other rotor pole (110).
  • stator concave pole 212 becomes a pitch hole.
  • the area of the surface facing the rotor convex pole 111 of the other rotor pole 110 adjacent to 120 is reduced.
  • stator convex pole 211 when the stator convex pole 211 is aligned with the rotor convex pole 111 of any one rotor pole 110, the step 213 of the stator pole 210 faces the pitch hole 120.
  • the stator concave pole 212 is aligned with the rotor concave pole 112 of the other rotor pole 110 adjacent to the pitch hole 120.
  • the circumferential width D1 of the inlet of the pitch hole 120 is the circumferential width D of the step 113 of the rotor pole 110, and the step of the rotor pole 110 ( The circumferential width D of 113 is also set to the circumferential width d of the step 213 of the stator pole 210.
  • stator convex pole 211 and the stator concave pole 212 are simultaneously excited by the excitation coil. Accordingly, while the magnetoresistance between the stator convex pole 211 and the rotor convex pole 111 gradually decreases, the magnetoresistance through the stator concave pole 212 gradually increases, so that the variation in the magnetic resistance decreases. As a result, torque ripple can be reduced.
  • FIG. 6A illustrates a state in which the rotor 100 is at a turn-on rotation angle ⁇ s. That is, it is a state at which the rotor convex pole 111 starts to face the stator convex pole 211.
  • Figure 6 (b) is a state of widening the area of the facing surfaces between the rotating rotor from the start point increase inductance ( ⁇ s) rotor convex pole 111 and the stator projection poles 211. That is, it is in the inductance increase period (theta) s-(theta) 1.
  • 6C shows a state in which the rotor convex pole 111 is aligned with the stator convex pole 211 by further rotating the rotor. That is, this is a state when the rotor is placed at the alignment rotation angles ⁇ 1 to ⁇ 2.
  • FIG. 6 (d) illustrates a point in which the rotor is rotated in the state where the rotor convex pole 111 and the stator convex pole 211 are aligned to be switched to an unaligned state. That is, it is in the state in which the inductance reduction periods ⁇ 2 to ⁇ 3 are present.
  • FIG. 6 shows the first gap G1 when the stator convex pole 211 faces the rotor convex pole 111, and when the stator convex pole 211 faces the rotor concave pole 111.
  • the third void G3 and the stator recess 212 when the second void G2 and the stator recess 212 face the rotor convex 111 may face the rotor recess 112.
  • the fourth void G4 of the poem is also shown.
  • the inductance waveform formed between the stator convex pole 211 and the rotor convex pole 111 is shown at the inductance increase starting point ⁇ s as shown in FIG.
  • the lowest point L12 is maintained until the inductance increase start point ⁇ s, and then the same waveform is periodically repeated.
  • the repetition period is 90 ° because the rotor is a 4-pole structure.
  • the maximum point L11 depends on the size of the first gap G1
  • the lowest point L12 is the second gap ( Depends on the size of G2). That is, the amplitude of the inductance waveform represented by the difference between the maximum point and the lowest point is determined by the height H of the step 113 of the rotor pole 110.
  • the rotor pole 110 Since the height H of the step 113 is 1 to 5 times the first gap G1, the amplitude is relatively small compared with the prior art.
  • stator concave pole 212 having the rotor pole 110 having a cross section having a two-stage diameter and simultaneously excited with the stator convex pole 211.
  • the area of the facing surface between the stator concave pole 212 and the rotor convex pole 111 increases as the facing surface between the rotor convex pole 111 and the stator convex pole 211 increases.
  • the lowest point L22 is reduced, and the facing surface between the rotor convex pole 111 and the stator convex pole 211 decreases. It increases as it becomes, and becomes the maximum point L21 when the rotor convex pole 111 and the stator convex pole 211 are disaligned.
  • the maximum point L21 is influenced by the third gap G3 when the stator concave pole 212 is aligned with the rotor convex pole 111.
  • the lowest point L22 is influenced by the fourth void G4 when the stator recess 212 is aligned with the rotor recess 111.
  • the third void G3 is larger than the first void G1 by the height h of the step 213 of the stator pole 210
  • the fourth void G4 is also larger than the second void G1. It is as large as the height h of the step 213 of 210.
  • the inductance waveform of the stator concave pole 212 is 180 ° out of phase with the inductance waveform of the stator convex pole 211 (electrical angle because it is a four-pole structure). 45 ° phase difference), and the maximum point L21 and the lowest point L22 are relatively smaller than the maximum point L11 and the lowest point L12 of the inductance by the stator convex pole 211, respectively.
  • the inductance waveform formed between the stator pole 210 and the rotor pole 110 is characterized by the inductance caused by the stator convex pole 211 shown in FIG. 7 (a) and the stator concave pole shown in FIG. 7 (b). It appears as shown in Fig. 7 (c) by the synthesis of inductance by 212).
  • the motor according to the present invention has a higher torque effective area ratio compared to the non-excited energizing section as shown in Fig. 7 (d) has better torque performance than the conventional single-phase switched reluctance motor (Fig. 2), mechanically stable, ripple This gives less torque.
  • the switched reluctance motor relieves the instantaneous inrush current (Rush current) when the stator pole 210 is excited by the exciting coil 214 at the turn-on rotation angle ( ⁇ s), and switching during driving of the motor.
  • ush current instantaneous inrush current
  • ⁇ s turn-on rotation angle
  • the switched reluctance motor relieves the instantaneous inrush current (Rush current) when the stator pole 210 is excited by the exciting coil 214 at the turn-on rotation angle ( ⁇ s), and switching during driving of the motor.
  • ⁇ s turn-on rotation angle
  • the stator and the rotor which are configured and coupled as described above, rotate the rotor by the rotation position sensor 300 and the controller 400.
  • the rotation position sensor 300 detects the rotation position of the rotor 100.
  • the rotational position of the rotor 100 to sense here is the excitation conduction section ( ⁇ on- ⁇ off) Turn-on rotation angle? On and turn-off rotation angle? Off.
  • the turn-on rotation angle ⁇ on is set before the inductance increase starting point ⁇ s so that the current sufficiently increases when the voltage is applied to the excitation coil and then enters the inductance increase section, but excessive inrush current occurs or reverse torque is generated.
  • the turn-off rotation angle ⁇ off is set within the inductance increase period ⁇ s to ⁇ 1 so that the magnetic induction power of the excitation coil is reversed after the voltage application is turned off. ( ⁇ 2) to be sufficiently destroyed before.
  • the rotation position sensor 300 may employ various methods mentioned in the prior art, and in the exemplary embodiment of the present invention, the rotation position sensor 300 may be configured as an optical sensor having a light emitting part and a light receiving part. It was installed on the top of the convex pole 211, and a reflecting plate 310 for reflecting the light of the light emitting unit to be detected by the light receiving unit was installed on the top of the rotor convex pole 111.
  • the rotation position sensor 300 may be installed on any one of the plurality of stator convex poles 211, and the reflector 310 is provided on the rotor 100.
  • the rotation position sensor 300 may be installed on any one of the plurality of stator convex poles 211, and the reflector 310 is provided on the rotor 100.
  • the direction of rotation of the rotor is determined, and when the rotor is rotated in the determined rotation direction, the reflector plate 310 is set in accordance with a preset energizing period ⁇ on- ⁇ off corresponding to the inductance increase period ⁇ s to ⁇ 1. Install it. Accordingly, the rotation position sensor 300 generates the first signal at the turn-on rotation angle ⁇ on and generates the second signal at the turn-off rotation angle ⁇ off.
  • the rotation position sensor 300 is installed at the stator convex pole 211, and is installed at the end of the portion that starts to face the rotor convex pole 111.
  • the reflector plate 310 is elongated in an arc shape having a rotation angle range of the excitation conduction section ⁇ on- ⁇ off, and is installed at the rotor convex pole 111 so as to correspond to the excitation conduction section ⁇ on- ⁇ off.
  • the excitation conduction period ⁇ on- ⁇ off is the same as the inductance increase period ⁇ s to ⁇ 1.
  • the reflector plate ( 310 is slightly biased towards pitch hole 120.
  • the rotation position sensor 300 installed as described above is configured to generate a 'Low' signal when detecting light reflected by the reflector, and to generate a 'High' signal when no light is detected. Accordingly, the first signal is generated to switch from 'High' to 'Low' at the time of entering the excitation energization section ⁇ on- ⁇ off, and at the time of exiting the excitation energization section ⁇ on- ⁇ off, Generates a second signal to switch to the high ', and transmits it to the controller (400).
  • the controller 400 detects the excitation conduction section ⁇ on- ⁇ off set in advance to correspond to the inductance increase period ⁇ s ⁇ 1 as the first signal and the second signal of the rotation position sensor 300, and energizes the excitation.
  • the driving voltage of the pulse waveform which supplies electricity to the excitation coil 214 only in the interval ⁇ on- ⁇ off is applied to the excitation coil 214. Accordingly, the rotor rotates in one direction with the rotational force by the reluctance torque.
  • the controller 400 sets the starting voltage of the pulse waveform to the starting pole excitation coil 221. Or the stator pole excitation coil 214, the above driving voltage is applied to the excitation coil 214 when it becomes a position where rotational drive is possible.
  • the controller 400 is connected to a capacitor (C) and a capacitor (C) connected to the capacitor (C) to receive and charge the DC electricity from the outside through the stator through the switching elements (Q1, Q2)
  • Asymmetric converter 440 which is supplied to the pole excitation coil 214, is connected in parallel with the capacitor C to supply electricity stored in the capacitor C to the starting pole excitation coil 221 through the switching element Q3.
  • the first gate driving circuit 420 and the microprocessor 410 which turn on the switching elements Q1 and Q2 of the asymmetric converter 440 according to the single switching circuit 450 and the excitation signal of the microprocessor 410.
  • the resistor R0 is connected between the second gate driving circuit 430 for turning on the switching element Q3 of the single switching circuit 450 and the negative terminal of the capacitor C and the ground according to the start signal of the single switching circuit 450. And converts and amplifies the voltage across the resistor R0 into a current value and inputs the result to the microprocessor 410.
  • the control circuit 460 performs the start control operation and the drive control operation according to the rotational position of the rotor detected by the rotation position sensor 300, and ideally controls the motor according to the current value detected by the current detection circuit 460. And a microprocessor 410 for performing a protection control operation.
  • the microprocessor 410 transmits a drive signal or a start signal for applying a voltage to the stator pole excitation coil to the first gate driving circuit 420 when performing the start control operation and the drive control operation.
  • a start signal for applying a voltage to the coil is output and transmitted to the second gate driving circuit 430.
  • the drive signal is a pulse waveform signal that applies a voltage to the stator pole exciting coil in accordance with the excitation conduction section ⁇ on- ⁇ off to rotate the motor at a rated speed.
  • the start signal is a pulse width modulation (PWM) waveform which has a very short period compared to the pulse waveform of the drive signal and has a predetermined length, and is applied to the stator pole exciting coil or the starting pole exciting coil when starting the motor. do.
  • PWM pulse width modulation
  • the microprocessor 410 may enable the rotor at a speed specified by the user, for this purpose, the microprocessor 410 excites a pulse width modulation (PWM) signal corresponding to the specified speed It can be applied to the energization section ( ⁇ on- ⁇ off).
  • PWM pulse width modulation
  • the drive signal or start signal for applying a voltage to the stator pole excitation coil 214 is asymmetrical by amplifying the first gate drive circuit 420.
  • a single switching circuit 450 is applied to the gates of the switching elements Q1 and Q2 of the converter 440 and amplified by the second driving circuit 420 to a start signal to be applied to the starting pole exciting coil 221. Is applied to the gate of the switching element Q3.
  • the asymmetric converter 440 is connected to both ends of the stator pole excitation coil 214 switching elements (Q1, Q2) to connect the stator pole excitation coil 214 in parallel to the capacitor (C) by turning on (turn on) And a reflux diode D1 which demagnetizes the electric energy accumulated in the stator pole excitation coil 214 at the turn-off of the switching elements Q1 and Q2 to the capacitor C. D2) is included, for example, since the technology disclosed by the Patent No. 10-0991923, detailed description thereof will be omitted.
  • the switching elements Q1 and Q2 are configured as a power electronic device that performs a high-speed switching operation according to a driving signal or a start signal applied through a gate, for example, a field effective transistor (FET) or an IGBT (insulated). gate bipolar mode transistor).
  • FET field effective transistor
  • IGBT insulated. gate bipolar mode transistor
  • the single switching circuit 450 connects one end of the starting pole excitation coil 221 to the (+) end of the capacitor C and the other end to the (-) end of the capacitor C through the switching element Q3.
  • the excitation of the starter pole coil 221 by the turn-on of the switching element (Q3) and comprises a freewheeling diode (D3, freewheeling diode) connected in parallel to the starter pole coil (221).
  • the switching element Q3 may be configured of a field effective transistor (FET) or an insulated gate bipolar mode transistor (IGBT) that performs high-speed switching by a start signal.
  • a start control operation by the microprocessor 410 will be described with reference to FIG. 9.
  • FIG. 9 is a flowchart illustrating a start method by the control of the controller 400.
  • the controller 400 detects a rotor position (S10), a starting attempt step (S20), a driving determination step (S30), and a rotor position adjusting step when a rotationally stopped rotor is rotationally started.
  • the motor is driven in accordance with the starting method (S40).
  • the rotor position detecting step S10 is a step of detecting the rotor position through the rotation position sensor 300.
  • the start attempt step (S20) is a stator pole when the rotor position to be determined based on the signal received from the rotor position sensor 300 is in the energizing period ( ⁇ on- ⁇ off), the voltage waveform corresponding to the drive signal This step is applied to the female coil.
  • the excitation current conduction section ⁇ on- ⁇ off is the same as the inductance increasing section ⁇ s to ⁇ 1, so that the drive is performed when the rotational position of the rotor is in the inductance increasing section ⁇ s to ⁇ 1.
  • a voltage is applied to the stator pole exciting coil.
  • the driving determination step (S30) detects whether the rotor rotates after the start attempt step (S20) by the rotation position sensor 300 and rotates to continuously apply a drive signal thereafter to drive the motor, if not rotated It is the step that goes to the electronic position adjusting step (S40). Here, it is determined whether to rotate by determining whether a motor driving operation of exciting the stator pole is normally performed according to the energizing section ⁇ on- ⁇ off sensed by the rotation position sensor 300.
  • the rotor position adjusting step (S40) is a case where the rotor position detected in the rotor position detecting step (S10) is not in the excitation conduction section ( ⁇ on- ⁇ off) or when it is crossed in the driving determination step (S30), Exciting the starting pole or the rotor pole in accordance with the start signal to change the position of the rotation angle of the rotor and proceeds to the rotor position detection step (S10).
  • the start signal is a signal that enables the rotor to be changed by changing a predetermined rotation angle position, and thus can be a PWM signal having a length of 1 sec or less, for example.
  • the rotor position adjustment step (S40) as described above after exciting the start pole exciting step (S41), the start pole 220 to change the position of the rotation angle of the rotor by exciting the start pole 220 according to the start signal
  • the rotor position is detected through the rotational position sensor 300 to check whether the rotor position is in the energizing section ⁇ on- ⁇ off, and if it is in the exciting energizing section ⁇ on- ⁇ off, the process proceeds to the starting attempt step S20.
  • the controller 400 is configured to the stator pole excitation coil in accordance with the excitation conduction section ⁇ on- ⁇ off detected by the rotation position sensor 300 when the rotor is in the excitation conduction section ⁇ on- ⁇ off when the motor is started.
  • the starting pole is excited in accordance with the starting signal of the PWM waveform. The operation is retried when the rotor is in the exciting energization section ( ⁇ on- ⁇ off) during the repeating operation and the excitation of the stator poles.
  • the moving pole 220 stops after being rotated by a predetermined angle in the counterclockwise direction by the excitation of the moving pole 220, and thus the probability of entering the excitation conduction section ⁇ on- ⁇ off is high.
  • the rotation angle position of the rotor is in the energization period ⁇ on- ⁇ off, but close to the alignment rotation angles ⁇ 1 to ⁇ 2, the starting of the motor may fail. However, even if the start fails, since the start pole 220 facing the pitch hole 120 is excited by the start signal, the rotation angle can be adjusted by rotating the rotor.
  • the rotation angle of the rotor enters the excitation conduction section ⁇ on- ⁇ off, and the starting pole 220 faces the middle of the rotor concave pole 112, so that the starting pole It is difficult to generate rotational force with the excitation of 220, and instead, the excitation of the stator pole 210 has a high probability that the rotation angle position of the rotor enters the excitation conduction section ⁇ on- ⁇ off.
  • FIG. 10 is a cross-sectional view of a portion of a switched reluctance motor according to a second embodiment of the present invention in which a 12-pole rotor is coupled to a 10-pole stator in an outer ring type.
  • the outer ring rotor type, the pole is arranged in a single phase structure, and includes a moving pole.
  • a plurality of twelve rotor poles 110 having the same polar angle are disposed at equal intervals along the circumferential direction of the inner circumferential surface on the inner circumferential surface of the rotor 100, and pitches between adjacent rotor poles 110.
  • the hole 120 is formed.
  • 12 poles are disposed on the outer circumferential surface of the stator 200 at equal intervals along the circumferential direction in the same manner as the number of the rotor poles 110, so that 12 poles are simultaneously aligned when the rotor poles 110 are aligned.
  • the 12 poles are unaligned at the same time.
  • the pair of symmetrical with respect to the center of rotation among the 12 poles of the stator 200 is configured as the moving pole 220 and the remaining 10 poles are configured as the stator pole 210.
  • the ten stator poles 210 are respectively wound with excitation coils 214 so that they can be simultaneously excited or elementd.
  • a reflecting plate 310 is installed at an upper end of the rotor convex pole 111 of each rotor pole 110 so as to fit the excitation conduction section ⁇ on- ⁇ off, and a plurality of stator poles 210 are provided.
  • Rotational position sensor 300 is installed on any one of the stator pole top.
  • stator pole As described above, even when the rotor 100 is rotated by combining the stator 200 having the 10 pole stator pole 210 with the rotor 100 having the 12 pole rotor pole 110, the stator pole ( The polar angle of 210 may be the same as the polar angle of the rotor pole 110, whereby the spacing between the stator poles 210 is also adjacent to the starting pole 220. It can be reduced by the circumferential width of the pitch hole 120.
  • the embodiment shown in FIG. 10 generates reluctance torque by using the entire inner circumferential surface of the rotor pole 110 as compared with the embodiment shown in FIGS.
  • the torque can be increased by that much.
  • controller 400 shown in FIG. 8 can be included to start the motor according to the starting method shown in FIG.
  • FIGS. 11 to 13 are diagrams for explaining a switched reluctance motor according to a third embodiment of the present invention.
  • a coupled state of the stator 200 and the rotor 100 is illustrated in cross-sectional view.
  • Fig. 12 the separated state of the stator and the rotor is shown in cross section.
  • FIG. 13 is a top view illustrating an arrangement state between the stator convex pole and the permanent magnet according to the position of the rotor, and an arrangement state between the rotation position sensor 300 and the reflector 310.
  • the rotor 100 is bisected into the rotor convex pole 111 and the rotor concave pole 112 having different inner diameters by the step 113 similarly to the first embodiment.
  • a plurality of rotor poles 110 are provided at equal intervals along the circumferential direction on the inner surface to be distinguished by the pitch holes 120.
  • the rotor poles 110 are provided in pairs, so if n is a natural number, it is 2n.
  • stator 200 does not include the starter pole 220 provided in the first embodiment, and instead, the stator pole 110 is formed at the position where the starter pole 220 was formed, and thus, the rotor 100.
  • stator poles 210 are provided on the outer surface at equal intervals along the circumferential direction, in the same number as the number of the rotor poles 110). Accordingly, when the rotor 100 rotates, all the rotor poles 110 are simultaneously aligned or unaligned at the same time with the stator poles 210 without missing any one.
  • each stator pole 210 has a two-stage diameter by the step 213, it is divided into a stator convex pole 211 and a stator concave pole 212 having different outer diameters, so that the rotor pole 110 ),
  • the rotor convex pole 111 and the stator concave pole 212 face each other, and the rotor concave pole 112 and the stator convex pole 211 face each other.
  • the third embodiment of the present invention does not have to include the single switching circuit 450 when the controller 400 is configured, and the processor for the starting method described with reference to FIG. 9 is a microprocessor. It may not be mounted at 410.
  • the third embodiment of the present invention mounts the permanent magnet 130 to the rotor concave pole 112 to position the rotor 100 that has stopped rotating at the rotatable angle, thereby providing a microprocessor 410. Is activated by applying a voltage to the excitation coil 214 according to the rotor rotation angle detected by the rotation position sensor 300.
  • the permanent magnets 130 are mounted in one pair in close contact with the rotor concave poles 112 at different positions, and the polarities toward the inside where the stator 200 is installed are different from each other. That is, one permanent magnet 130 has an N pole toward the inside and the other permanent magnet 130 has an S pole toward the inside.
  • the permanent magnets that make up a pair of two can be provided and mounted in a plurality of pairs. That is, when the number of the rotor poles 110 is 2n and k is a natural number less than or equal to n, one of the 2k rotor recesses 112 among the 2n rotor recesses 112 is provided.
  • the permanent magnets 130 are mounted in close contact. At this time, the k permanent magnets 130 are directed to the N pole inward, the remaining k permanent magnets 130 are directed to the S pole inward. At this time, the permanent magnet with the N pole facing inward and the permanent magnet with the S pole facing inward may be disposed to face the rotation axis.
  • Each permanent magnet 130 is formed in an arc shape having a polar angle ⁇ m that is relatively smaller than the polar angle ⁇ rc of the rotor concave pole 112, and the outer surface of the permanent magnet 130 has a rotor concave pole 112. At the time of mounting in close contact with the pitch), it is mounted to the pitch hole 120. Accordingly, the permanent magnet 130 is spaced apart from the step 113 on one side of the mounted rotor concave pole (112).
  • the permanent magnet 130 is in close contact with the circumferential side 111a of the rotor convex pole 111 across the opening inlet 120a of the pitch hole 120.
  • the pair of permanent magnets having the N pole facing inward and the permanent magnet 130 having the S pole facing inward are separated from the step 113 on one side in the rotor concave pole 112, and the pitch hole on the other side is provided.
  • the magnetic force flux of 130 passes through the stator 200 in a path of decreasing the magnetic resistance and is directed to the permanent magnet on the opposite side.
  • the permanent magnets 130 mounted on the rotor receive magnetic reluctance torque to align with the stator convex poles 211 having a smaller pore when they face each other and a shorter magnetic circuit than the stator concave poles 212. Ensure that the rotor is always aligned to the activatable position.
  • the permanent magnet 130 is used for the purpose of aligning the rotor to the startable position in the torque-free state, so that the stator convex pole 211 excited by the excitation coil 214 to drive the motor
  • a magnet with a very small magnetic force relative to the magnetic force it does not act as a reverse torque or resistance that prevents smooth rotation during the starting and operation of the rotor.
  • the rotor 100 reduces the speed until the inertia force is exhausted and then aligns with the permanent magnet 130, even after the motor stops, the permanent magnet 130 is stator even if vibration caused by external shock occurs.
  • the reluctance torque to be aligned with the convex pole 211 is generated, so that the entire surface of the permanent magnet 130 is connected to the stator convex pole 211 as illustrated in FIGS. 13A, 13B, and 13C. It is in a facing state.
  • stator convex pole 211 is at a rotation angle starting to face the rotor convex pole 211 as shown in FIG. 13 (b) or at least the stator convex as shown in FIG. 13 (c).
  • pole 211 pole firing angle ( ⁇ m) Since one pole face by a firing angle and the rotor projection poles 211 subtracts the, woman the stator projection poles 211 energizing interval ( ⁇ on- of permanent magnets 130 on the firing angle of a pole The rotor can be rotated by exciting it with [theta] off).
  • the front surface of the permanent magnet 130 is connected to the stator concave pole 212 as shown in FIGS. 13E, 13F, and 13G. It can be face to face.
  • the reflector plate 310 installed in accordance with the excitation conduction period ( ⁇ on- ⁇ off) set to correspond to the inductance increase interval to generate the positive torque is not in the state facing the rotation position sensor 300, the stator pole 210 Excitation) reverses by but torque.
  • the controller 400 is moved to the rotation position sensor 300.
  • the drive is controlled by applying a voltage to the stator pole exciting coil in accordance with the sensing energizing section ( ⁇ on- ⁇ off).
  • the controller 400 applies a voltage to the excitation coil in accordance with the start signal of the PWM waveform as in the first embodiment, thereby predetermining the rotor.
  • the rotating operation at an angle is repeated until the rotor is in the excitation conduction section ⁇ on- ⁇ off, and when the rotor is in the excitation conduction section ⁇ on- ⁇ off, drive control is performed according to a drive signal thereafter.
  • the polar angle ⁇ m of the permanent magnet 130 is preferably 1/5 to 2/3 times the rotor concave pole polar angle ⁇ rc as expressed by Equation 1 below.
  • the stator convex pole 211 is rotated with the stator convex pole 211 in the situation shown in FIG. 13 (b) when the starting rotational force at the moment of starting cannot be obtained close to the alignment rotation angles ⁇ 1 to ⁇ 2 between the electron convex poles 111 and is larger than 2/3 times the rotor concave pole polar angle ⁇ rc .
  • the rotor convex 111 may not reach the position where it starts to face the stator convex pole 211. Therefore, it is good to set it as the range represented by said Formula (1).
  • the permanent magnet 130 is made of a material having a high magnetic resistance because it crosses the open inlet of the pitch hole 120, the path through the permanent magnet 130 during the magnetic flux flux of the excited stator pole 210 It is good to lower the amount of magnetic flux to form.
  • the permanent magnet 130 may be composed of a non-metal magnet, such as a rubber magnet, a ferrite magnet, a plastic magnet or an organic material magnet.
  • a non-metal magnet such as a rubber magnet, a ferrite magnet, a plastic magnet or an organic material magnet.
  • it since it may be damaged by the heat generated by the motor, it is good to use a magnet having high magnetic resistance while having heat resistance if possible.
  • the groove is formed in the rotor concave electrode 112 to fix the permanent magnet 130 into the groove. Or may be fixed using a pitch hole.
  • FIG. 14 is a graph showing the detected data after detecting the current flowing through the excitation coil with an oscilloscope in a state in which a switched reluctance motor according to the present invention is actually manufactured and driven.
  • the present invention is made of a gentle curve when applying a voltage to the exciting coil, the present invention can significantly reduce the torque and cogging impact noise compared to the prior art, such as the current waveform shown in FIG. have.
  • the present invention has the effect of suppressing the magnetic induction residual electricity in the excitation coil after the turn-off rotation angle ⁇ off due to the self-mechanical structures of the concave and convex poles of the salient poles. It takes a shorter time to return to the device, and the effect of reducing vibration noise and efficiency decrease due to the reverse torque generated at the turn-off rotation angle ⁇ off can be obtained.
  • Reference numeral 110 rotor pole 111: rotor convex pole 112: rotor concave pole
  • stator pole 211 stator convex pole 212: stator concave pole
  • step 214 driving theater female coil
  • rotor position detection sensor 310 encoding sensor plate (reflection plate)
  • microprocessor 420 first gate driving circuit
  • second gate driving circuit 440 asymmetric converter
  • ⁇ r rotor pole polar angle
  • ⁇ s stator pole polar angle
  • ⁇ rc rotor concave polar angle
  • ⁇ m permanent magnet polar angle

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Abstract

La présente invention concerne un moteur à réluctance commuté de type rotor à chemin de roulement extérieur, présentant un grand rendement de couple, l'ondulation de couple et le bruit de vibration étant réduits par configuration respective d'un pôle statorique qui est excité au niveau d'une bobine d'excitation, et d'un pôle rotorique qui est en regard du pôle statorique, en tant que pôles de diamètres en deux étages au moyen d'étages.
PCT/KR2015/007345 2014-07-16 2015-07-15 Moteur à réluctance commuté WO2016010361A1 (fr)

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CN117938018A (zh) * 2024-03-20 2024-04-26 深圳大学 一种调姿平台的电机姿态控制方法、装置及设备

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US11121663B2 (en) 2016-11-11 2021-09-14 Sn Innovation Co., Ltd. 2-phase outer ring switched reluctance motor for low-speed and high-flow rate fan
KR101916814B1 (ko) * 2016-11-11 2018-11-09 주식회사 에스엔이노베이션 저속 고풍량 팬용 2상 외륜 스위치드 릴럭턴스 모터
KR102036994B1 (ko) * 2018-04-23 2019-10-25 경성대학교 산학협력단 스텝 고정자 구조의 2상 srm
CN110138128B (zh) * 2019-05-22 2021-12-07 溧阳市宏达电机有限公司 一种精密定位摆动的永磁伺服电机及其制作方法

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