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WO2001008174A1 - Ensemble aimant muni d'un element noyau a mouvement alternatif et procede de fabrication associe - Google Patents

Ensemble aimant muni d'un element noyau a mouvement alternatif et procede de fabrication associe Download PDF

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Publication number
WO2001008174A1
WO2001008174A1 PCT/US2000/019520 US0019520W WO0108174A1 WO 2001008174 A1 WO2001008174 A1 WO 2001008174A1 US 0019520 W US0019520 W US 0019520W WO 0108174 A1 WO0108174 A1 WO 0108174A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic core
casing
parts
solenoid
metal strip
Prior art date
Application number
PCT/US2000/019520
Other languages
English (en)
Inventor
David Livshits
Alexander Mostovoy
Georgy Kataev
Victor Shliakheckiy
Original Assignee
Robotech, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robotech, Inc. filed Critical Robotech, Inc.
Priority to AU62195/00A priority Critical patent/AU6219500A/en
Publication of WO2001008174A1 publication Critical patent/WO2001008174A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions

Definitions

  • the present invention relates to magnet assemblies, particularly to electromagnetic
  • a member generally has a low speed of reciprocation, i.e., a long working cycle and a pause
  • a so-called armored electromagnet is an attempt at overcoming these deficiencies of
  • a casing made of magnetic material surrounds the solenoid of the magnet.
  • the solenoid is
  • the stationary magnetic core and the movable magnetic core are both made of a
  • the solenoid is connected to a power supply to
  • moving magnetic core element is connected to a load so as to perform mechanical work on the
  • An armored electromagnet also has a relatively short reciprocation stroke of the
  • the force output is relative small in comparison with the energy consumption, and there is
  • the present invention is directed to providing an electromagnet assembly which is
  • At least one electromagnet assembly described specifically herein exhibits an increase in stroke
  • electromagnets One or more electromagnet assemblies in accordance with the invention
  • the linear dimensions may be reduced, not only overall but also per unit of output energy.
  • the present invention is also directed to a method for manufacturing an electromagnet.
  • An electromagnetic device in accordance with the present invention comprises a solenoid having an axis, a stationary magnetic core, a movable magnetic core, and a casing.
  • the stationary magnetic core is fixed relative to the solenoid and is disposed at least in part
  • the stationary magnetic core has a polygonal transverse cross-section in
  • the movable magnetic core is translatably
  • the movable magnetic core has a polygonal transverse cross-section in a
  • the casing is disposed about the solenoid and
  • the casing parts may be solid pieces formed, for example, by a casting process.
  • one or more casing parts is formed of a plurality of layers of a wound
  • That common polygonal transverse cross-section has an even number of sides.
  • the casing parts have layers which are wound about respective axes, those axes have
  • casing part has layers with a winding direction differing from the winding directions of the
  • the casing parts are equal in one preferred embodiment of the present invention.
  • the cores are rectangular or square in cross-section, the casing has four parts.
  • casing parts are formed of wound metal strips, a first pair of the casing parts is made from the
  • the metal strip is wound about a frame and cut, e.g., in halves, to form the pair of
  • a second pair of casing parts is formed by the same technique. In the assembled
  • the casing parts of the first pair face each other and the casing parts of the
  • each pair are preferably mirror symmetric with respect to one another.
  • each of the casing parts has a
  • main body located in one plane and a pair of flanges at opposite ends of the main body
  • flanges being disposed in respective planes which are parallel to one another and
  • the main body and the flanges are integrally formed and may
  • the casing has four parts ( and accordingly a prismatic casing shape), the casing
  • the parts include a pair of first parts and a pair of second parts.
  • parts are each formed of a plurality of layers of a metal strip partially coiled or wound about a
  • the second casing parts are each
  • the first parts are preferably mirror symmetric with respect to one another, and the second parts are preferably mirror symmetric with respect to one another.
  • the first pair of casing parts is provided with protrusions while the second pair of casing parts
  • the first casing part has four planar sides or panels arranged in an endless loop, i.e., in
  • the second part likewise has four sides or panels arranged in an endless loop,
  • the second casing part is disposed in the second casing part so that the
  • apertures and the openings are aligned with each other along the axis of the solenoid.
  • stationary magnetic core traverses one of the apertures and a respective one of the openings
  • the second casing part fit together to form the casing as a prismatic enclosure or envelope
  • the casing parts are also bonded to the stationary magnetic
  • the cores each have a
  • solenoid includes a frame or coil holder made of a fabric impregnated with a carbon
  • composition and (iii) a space of changing volume between facing or working surfaces of the
  • cores being provided with a lubricant including a filler composition serving as a plating agent.
  • the filler composition may include fine copper powder and/or fine graphite powder.
  • one magnetic core has a working surface in the form of a protruding
  • magnetic core has a working surface in the form of a protruding pyramid, while the working
  • the casing substantially envelopes the solenoid.
  • casing defines two openings or apertures disposed along the axis of the solenoid at opposite
  • one opening is sealed by the stationary magnetic core which
  • An electromagnetic device comprises, in accordance with another conceptualization of
  • a solenoid having an axis, a stationary magnetic core fixed relative to
  • each of the casing parts includes at least two interfit parts rigidly coupled to each other, each of the casing parts being
  • a first one of the casing parts is formed of
  • the parts of a first pair have a common width equal to a width of the
  • Each of the parts of the second pair also incorporates a pair of
  • the main body is planar and the protrusions are coplanar with the main
  • the stationary magnetic core and the movable magnetic core have identical
  • a method for fabricating an electromagnetic device of the wound strip type comprises,
  • a solenoid frame to form a solenoid having an axis, and (b) forming a first casing part in part
  • the method also comprises the step (c) of forming a second casing part in part by
  • the second casing part are assembled to one another to form an at least partially enclosed
  • second casing part further includes deep annealing of the respective wound or coiled
  • the method may further comprise covering the annealed casing part with an
  • varnish may be accomplished by placing the casing part in a container of the epoxy varnish.
  • the method further comprises grinding the sliding contact surfaces
  • first casing part is one of two first casing parts, the forming of the first
  • casing parts includes cutting the wound or coiled first metal strip at two locations prior to the
  • the cutting is completed only after the annealing and the varnishing.
  • the cutting of the wound of a coiled metal strip to form two casing parts is preferably
  • second metal strip includes winding that metal strip a predetermined number of windings
  • first metal strip is wound about a first axis and the second metal strip is wound about a second axis, the assembling of the first casing part and the second casing part
  • second axis are oriented at a non-zero angle, e.g., 90°, relative to one another.
  • the second casing part includes passing the respective metal strip through a container of a
  • the second casing part and the second casing part includes providing projections and recesses on the first casing
  • part then includes inserting the projections into respective ones of the recesses to lock the first
  • casing part further includes adhesively bonding the first casing part and the second casing part
  • the disposing of the first magnetic core include placing the first casing part and the
  • the manufacturing method may additionally comprise depositing a dose of a thick
  • solenoid and being oriented perpendicularly to the axis of the solenoid.
  • the assembling of the first casing part and the second casing part includes orienting the first casing part and the second casing part relative to one another to produce a plurality of
  • planar casing faces contiguous with one another about a perimeter of the enclosed casing.
  • the first casing part and the second casing part are oriented relative to one another so that the
  • casing parts associated with contiguous ones of the casing faces have differently oriented axes
  • the present invention is directed to electromagnets and is particularly beneficial for
  • the invention can be used in the development and operation of power electromagnets having
  • Electromagnets with reciprocating core members in accordance with the present
  • invention can have stroke of up to 100 mm and can therefore be used in all fields of
  • Fig. 1 is a schematic axial cross-sectional view of an electromagnetic assembly with a
  • FIG. 2 is a schematic axial cross-sectional view similar to Fig. 1, showing parallel
  • Fig. 3 is a diagram of the electromagnetic assembly of Figs. 1 and 2, together with a
  • flywheel assembly showing use of the electromagnetic assembly as part of a motor or engine.
  • Fig. 4 is partially a schematic axial cross-sectional view of the electromagnetic
  • Fig. 5 is a partial schematic perspective view of a prior art reciprocating-type
  • electromagnet showing lines of force between a movable magnetic core and a stator.
  • Fig. 6 is a partial schematic perspective view of the electromagnetic assembly of Figs.
  • Fig. 7 is a graph showing energy output as a function of total mass of an
  • Fig. 8 is a schematic side elevational view of the electromagnetic assembly of Figs. 1
  • Fig. 9 is a schematic axial cross-sectional view of the electromagnetic assembly of
  • Fig. 10 is a schematic isometric view, partly broken away along an axial plane, of the
  • Fig. 11 is a schematic transverse cross-sectional view, taken exemplarily along plane
  • Fig. 12 is a graph showing effective stroke length of a movable magnetic core as a
  • Fig. 13 is a schematic side elevational view, partly broken away, of an electromagnetic
  • Fig. 14 is a schematic transverse cross-sectional view taken along plane P2' in Fig. 13.
  • Fig. 15 is a schematic transverse cross-sectional view taken along plane PI' in Fig. 13.
  • Fig. 16 is a partial cross-sectional view, on an enlarged scale, of a metal fin of a
  • Fig. 17 is a block diagram showing circuit elements for controlling the
  • Fig. 18 is a pair of ganged graphs showing voltage applied and resulting current as a
  • Fig. 19 is a partially broken away, schematic isometric view of an electromagnet
  • Fig. 20 is a schematic longitudinal cross-sectional view of the electromagnet assembly
  • Fig. 21 is a schematic bottom plan view, on a smaller scale, of a casing of the
  • Fig. 22 is a schematic longitudinal cross-sectional view similar to Fig. 20, showing a
  • Fig. 23 is a schematic longitudinal cross-sectional view similar to Figs. 20 and 22,
  • Fig. 24 is a schematic longitudinal cross-sectional view similar to Figs. 20, 22, and 23, depicting a further modification of the electromagnet assembly of Figs. 19-21.
  • Fig. 25 is a schematic longitudinal cross-sectional view similar to Figs. 20 and 22-24,
  • Fig. 26 is a schematic longitudinal cross-sectional view of the electromagnet of Figs.
  • Fig. 27 is a schematic isometric view of a frame utilizable in accordance with the
  • Fig. 28 is a schematic end elevational view of the frame of Fig. 27, showing a metal
  • Fig. 29 is a schematic end elevational view similar to Fig. 28, showing a subsequent
  • Fig. 30 is a schematic isometric view of a modification of the electromagnet assembly
  • Fig. 31 is a partially broken away view similar to Fig. 31.
  • Fig. 32 is a schematic isometric view of a casing for another electromagnet assembly
  • Fig. 33 is schematic isometric view of the casing of Fig. 32, partially broken away to
  • Fig. 34 is a schematic side elevational view, partially broken away, of an
  • electromagnet assembly incorporating the casing of Figs. 32 and 33.
  • Fig. 35 is an exploded diagram of the electromagnet assembly of Fig. 34, showing a
  • FIG. 36 is a schematic side elevational view, partially broken away, showing a
  • Fig. 37 is a schematic isometric view of a casing part and stationary and movable
  • Fig. 38 is a schematic perspective view showing a stage in the manufacture of the
  • Fig. 39 is an exploded schematic perspective view showing another stage in the
  • Fig. 40 is a schematic perspective view of another electromagnet assembly in
  • Fig. 41 is a schematic perspective view of yet another electromagnet assembly in
  • Fig. 42 is a schematic perspective view of a stationary magnetic core and a housing for
  • a restoring spring included in the electromagnet assembly of Fig. 40 or 41.
  • an electromagnetic assembly 20 comprises a casing 22,
  • Stationary magnetic core 26 is
  • solenoid 24 disposed at least partially inside solenoid 24 and is fixed relative to the solenoid and casing
  • Stationary magnetic core 26 and movable magnetic core 28 have polygonal
  • cores 26 and 28 particularly have a rectangular or square cross-
  • Solenoid 24 and casing 22 have the same polygonal or, more
  • stationary magnetic core 26 and movable magnetic core 28 specifically, rectangular, shape as stationary magnetic core 26 and movable magnetic core 28.
  • Stationary magnetic core 26 and movable magnetic core 28 are shaped to fit tightly in
  • solenoid 24 while casing 22 has the same shape as the outside profile of solenoid 24.
  • Movable magnetic core 28 is free to reciprocate with a varying proportion of the movable core
  • movable magnetic core 28 may be connected via interlinked crank rods 34 to a load 36 such
  • Electromagnetic assembly 20 is
  • Flywheel 36 is provided with an
  • a photosensor 44 is
  • Casing 22 serves in part at least to reduce
  • Movable magnetic core 28 thus executes a power stroke which starts
  • magnetic core 28 and stationary magnetic core 26 reaches a minimum, for example, 0.5 to 1
  • the material of magnetic cores 26 and 28 and casing 22 has
  • the domains 55 can thus be considered to be mini-magnets. It
  • the magnetic flux generated by the aligned domains 55 is several orders of magnitude greater
  • crank rods 34 was 25 mm, the lever arm ratio was 1.5, the loop number of solenoid 24 was
  • solenoid 24 is connected to a positive pole of power supply 54
  • Power supply 54 further includes
  • transistors 68 and 70 and a diode 72 At the maximally extended position of movable magnetic core 28, when the core is at
  • switch 60 is opened and current is
  • solenoid 24 in the form of a powerful pulse for generating a magnetic field of
  • the series of transient electrical pulses have a phase
  • power supply 54 may have a sawtooth profile to maximize magnetization for a given
  • energizing current is interrupted. Energy in the magnetic field is then converted into electric
  • This current is directed back to a power source 74 included in
  • Movable magnetic core 28 is returned from its maximally retracted position
  • flywheel 36 to its maximally extended position by an external force exerted, for example, by flywheel 36.
  • the cycle is then repeated at the highest possible frequency.
  • Cores 26 and 28 and casing 22 must be made of a magneto-susceptible material.
  • Casing 22 is an external enclosure which functions to prevent energy leakage into the
  • Casing 22 and cores 26 and 28 have parallel walls.
  • casing 22 and cores 26 and 28 also contributes to the effectiveness or efficiency of the energy transformation.
  • FIG. 1 illustrates a cylindrical assembly having a cylindrical movable magnetic core 76 (only a
  • FIG. 5 also shows interaction forces 82
  • Fig. 6 similarly depicts a portion of a
  • movable magnetic core 84 having the shape of a right rectangular prism disposed for
  • square core 84 is 2.5 to 3.0 times greater than that for the cylindrical core 76.
  • the rectangular shape requires the least energy for magnetization.
  • the mass of electromagnetic assembly 20 should not be less than a critical value of 8
  • electromagnets with a long reciprocation stroke i.e., where the stroke of the movable magnetic core has a length approximately equal to the length of the side of the cross-section
  • Fig. 7 presents some experimental data and some calculated numbers showing the
  • Point 2 corresponds to the situation when
  • movable magnetic core 28 has dimensions of 30 mm by 30 mm and a power stroke of 25 mm.
  • movable magnetic core 28 has dimensions of 40 mm by 40 mm and a power
  • movable magnetic core 28 has dimensions of 50 mm by 50 mm
  • Mass of the magnet in kilograms is plotted along the horizontal
  • This output provides for all of the energy needs of the motor.
  • electromagnetic assembly 20 including cores 26 and 28, casing 22 and
  • solenoid 24 has a shape of a straight parallelpiped with the short edges parallel to each other.
  • stationary magnetic core 26 t represents the length of that portion of movable magnetic core
  • ⁇ is the maximum distance between movable magnetic core 28 and stationary magnetic core 26
  • H is the height of the entire electromagnet assembly 20
  • B is
  • volume V of stationary magnetic core 26 can be calculated as follows:
  • V N/(f - ⁇ E)
  • f is the frequency of magnet activation and the frequency of approach of movable
  • ⁇ E is the specific energy capacity (0.5 J) of
  • the material of the cores 26 and 28, and N is the required power of the electromagnet
  • assembly 20 should be no less that 50 J per cycle.
  • Movable magnetic core 28 has a length L 6 greater than
  • solenoid 24 has a wall thickness L 2 of
  • Solenoid 24 has a wall thickness L ! differing from the distance L 2 between outer surface 92 of
  • stationary magnetic core 26 is spaced from a transverse symmetry plane P3 of casing 22 by a
  • symmetry plane P3 is oriented transversely to axis 30 and that
  • solenoid 24 has a mouth opening 96 traversed by movable magnetic core 28. Symmetry plane
  • Movable magnetic core 28 has a reciprocation stroke with
  • movable magnetic core 28 is disposed at a distance L 7 of less than approximately 4 mm from
  • the length K of solenoid 24 is greater than the length ( ⁇ - [0.5 to 1 mm]) of the reciprocation stroke of movable magnetic core 28,
  • length or height H of casing 22 is approximately equal to a sum of the length K of
  • distance L 4 is equal to length m of stationary magnetic core 26 plus the
  • FIG. 10 is a longitudinal cross-sectional view of electromagnet assembly 20, taken in a
  • Arrows 100 indicate magnetic field lines generated during
  • stationary magnetic core 26 or movable magnetic core 28 is at least 150°.
  • one edge of core 26 or 28 is indicated has having length b, while the other edge has
  • the electromagnetic assembly 20 is square in cross-section. Where a ⁇ b and A ⁇ B, the
  • electromagnetic assembly 20 is more generally rectangular in cross-section.
  • Edge length a is selected using the criterion of torque, which is the driving force. It is
  • crank mechanism including crank rods 34 which converts
  • solenoid 24 is 60 to 65 mm, the effective power stroke of movable magnetic core 28 is
  • movable magnetic core is approximately linear.
  • the optimal stroke length is generally 30 to 35 mm, although longer stroke lengths may be optimal in particular
  • ⁇ is a constant having a value of approximately 0.3.
  • ⁇ 0 is a magnetic constant
  • ⁇ is the magnetic permeability of the cores 26 and 28
  • N is the number of wire loops in solenoid
  • K is the length of solenoid
  • solenoid 24 with less electric current for energizing solenoid 24 and/or fewer loops in solenoid 24. It is
  • magnetic material which are preferred are iron-silicon alloy having a magnetic permeability ⁇ of 5,000 and a maximum field strength of 1.4 - 1.6 Tl and supermendure having a magnetic
  • transistor switches 60 and 68 are
  • Voltage control transistor 66 is required because without it a threshold
  • voltage control transistor 66 blocks current from passing from the power
  • voltage control transistor starts conducting
  • Effectiveness of the motor of Fig. 3 is also determined by the operating speed of the motor
  • movable magnetic core 28 is approximately 50 Hz, which corresponds to 50 rotations of
  • E M is the mechanical work performed by the magnetic assembly 20 per cycle of
  • J 2 • R • T represents heat losses in the system per cycle.
  • magnetic cores 26 and 28 and casing 2 are made of thin mutually isolated
  • air conditioning efficiency is greater than 100% (excluding heat energy exchange with the environment), i.e., it is a common heat pump. In the present case, it is
  • electromagnetic assembly 22 functions in part as a magnetic "heat” pump, which
  • microphotography was taken into account in an evaluation of the volume of the boundaries in
  • this volume is approximately 1000/3
  • the energy is used to generate an additional acceleration
  • the released boundary energy can be consumed in generating this additional magnetic field.
  • the movable magnetic core is sufficiently long. With a rectangular shape, it is easier to
  • the main principal advantage is that the solenoid 24 more
  • the engine of Fig. 3 is believed to produce mechanical energy that is equal to the
  • Assembly 20 is a long-stroke armor-type electromagnet, which is distinguished
  • PWM pulse width modulation
  • the engine's core 28 moves and approaches the stationary magnetic pole of the stator, i.e.,
  • This invention provides an opportunity for creating extremely economic electric
  • reciprocatable magnetic core 128 comprises a casing 122, a solenoid 124 disposed inside the
  • magnetic core 126 movable magnetic core 128, and casing 122 are made of magneto-
  • Stationary magnetic core 126 is disposed at least partially inside
  • solenoid 124 and is fixed relative to the solenoid and casing 122, while movable magnetic
  • core 128 is disposed for reciprocation partially inside the solenoid along an axis 130.
  • Stationary magnetic core 126 and movable magnetic core 128 have polygonal cross-sections
  • 126 and 128 have a rectangular or square cross-section in planes PI', P2'.
  • Movable magnetic core 128 is free to reciprocate with a varying proportion of the
  • movable core being located outside of solenoid 124 and casing 122.
  • solenoid 124) of movable magnetic core 128 is operatively coupled via a push rod 134 to a
  • Restoring mechanism 136 functions to return movable magnetic
  • Electromagnetic assembly 120 is mounted via a support base 138 to a pair of brackets
  • Mechanism 136 includes a dog-leg-shaped lever 144 swingably mounted via a pivot pin 146 to bracket 140.
  • roller 148 rotatably secured to an outer end of push rod 134 traverses a slot 150 in lever 144.
  • Restoring mechanism 136 also includes a cam 152 turnably mounted to a shaft 154.
  • bracket 142 is connected at one end to bracket 142 and at an opposite end to lever 144 for maintaining
  • camming roller 156 in rolling contact with cam 152.
  • Solenoid 124 is representative of solenoid 24 and includes a spool 160 which carries a
  • Solenoid 124 and casing 122 have the same polygonal or, more
  • Stationary magnetic core 126 and movable magnetic core 128 are shaped to fit tightly in
  • solenoid 124 while casing 122 has the same shape as the outside profile of solenoid 124.
  • Spool 160 is made of hard polyurethane vacuum plated with a layer of aluminum, a
  • Solenoid 24 having a cavity surface 161 lapped with
  • the layer of aluminum has a thickness
  • the layer of zinc has a thickness of 2 to 3 ⁇ m
  • the layer of nickel has a
  • movable magnetic core 128 is provided with a
  • Push rod 134 traverses a bore or
  • electromagnetic assembly 120 The operation and efficiencies of electromagnetic assembly 120 is essentially
  • Casing 122 serves in part at
  • the poles of the stator including
  • movable magnetic core 128 When movable magnetic core 128 is located at a maximum
  • solenoid 124 Preferably, the current grows rapidly to achieve a predetermined value in a
  • movable magnetic core is located at the maximum distance from stationary magnetic core
  • cam 152 may be operatively connected to push rod 134 via
  • camming roller 156 for restoring the push rod to a withdrawn position prior to a moving of
  • stationary magnetic core 126 reaches a minimum, for example, 0.5 to 1 mm, the supply of
  • Push rod 134 may have a cylindrical outer surface (not separately designated) coated with a nickel layer and an outer copper layer.
  • the layer of copper preferably has a
  • the thickness of 45 to 50 ⁇ m and the layer of nickel preferably has a thickness of 50 to 60 ⁇ m.
  • push rod 134 stationary magnetic core 126 and movable magnetic core 128 are all
  • cavity surface 161 of spool 160 is
  • solenoid 24 of electromagnetic assembly
  • assembly 120 is manufactured from a plurality of steel fins 174 bonded to each other along
  • steel fins 174 have outer surfaces 176 vacuum plated with a layer of aluminum 178, a layer of
  • Aluminum layer 178 preferably has a thickness of 4 to 5
  • zinc layer 180 preferably has a thickness of 2 to 3 ⁇ m
  • nickel layer 182 preferably
  • casing 122 is constructed of a plurality of steel fins 184 bonded to each
  • fins 184 of casing 122 have outer surfaces vacuum plated with a layer of aluminum, a layer of
  • the layer of aluminum has a thickness of 4 to 5 ⁇ m, the layer of
  • zinc has a thickness of 2 to 3 ⁇ m
  • the layer of nickel has a thickness of 50 to 60 ⁇ m.
  • Solenoid 124 and casing 122 are coaxially and symmetrically disposed about axis 130,
  • axis 130 is an axis of symmetry of stationary magnetic core 126 and movable magnetic core 128. Space between working surfaces of stationary magnetic core 126 and movable
  • an external inductor 186 (Fig. 3), such as a saturable reactor,
  • This external ductor 186 is placed in series with solenoid 24
  • External inductor 186 is
  • Fig. 17 illustrates circuit elements for controlling the operation of electromagnetic
  • a microprocessor 188 is provided for controlling the
  • Processor 188 receives input from a current
  • Processor 188 receives additional
  • Speed sensor 192 is operatively
  • sensor 194 is operatively linked to electromagnetic assembly 20 for measuring the
  • Processor 188 is connected to a controller or driver 196 in turn connected to
  • inductor 186 for adjusting the variable inductance thereof in response to control signals from
  • processor 188 sends a signal to a pair of
  • switches 198 and 200 to close those switches and thereby enable the application of a voltage
  • solenoid 24 results in the conduction of current therethrough and the generation of a
  • processor 188 transmits a signal to
  • controller 196 (Fig. 3) to adjust the inductance of variable- inductance inductor 186 so that the
  • This constant R const is stored in encoded form in a register 202 and may be
  • processor 188 works
  • 188 may calculate the speed of movable magnetic core 28 as a function of the rate of change
  • processor 188 monitors the instantaneous inductance of
  • electromagnetic assembly 20 to determine when that inductance reaches a preset value
  • processor 188 opens switches 198 and 200 to disrupt the application
  • processor 188 transmits a signal to an energy
  • utilization module 206 to enable the return of stored energy to power supply 54. The time
  • This pulse width modulation is implement by a PWM
  • module 208 (Fig. 17) operatively connected via a diode 210 to a circuit path 212 including
  • Energy utilization module 206 is
  • circuit path 212 connected to circuit path 212 via switch 198 and a diode 214.
  • Fig. 18 is a graph depicting, on respective ordinate axes, voltage U applied to solenoid
  • solenoid 24 As a result, current begins to be conducted through the solenoid and increases at
  • a magnetic flux is generated as a result of the current flow, and movable
  • magnetic core 28 begins to move in response to the concomitant magnetic interaction force.
  • I AV is the average current
  • L(t) is the instantaneous inductance of electromagnetic
  • processor 188 voltage is again applied to solenoid 24.
  • solenoid 24 and the internal system parameters stabilization system is blocked.
  • processor 188 sends a signal to activate the system which utilizes the energy
  • the system is analyzed and impulses of a preselected power
  • an electromagnetic device comprises a solenoid 216
  • Stationary magnetic core 220, movable magnetic core 222, and casing 224 are identical to Stationary magnetic core 220, movable magnetic core 222, and casing 224.
  • Stationary magnetic core 220 is rigidly connected to
  • solenoid 216 is disposed at least in part inside solenoid 216.
  • Movable magnetic core 222 is
  • solenoid 216 translatably connected to solenoid 216 and disposed partially inside solenoid 216 for
  • Casing 224 is disposed about solenoid 216 and includes a
  • Casing parts 226 and 228 are mirror symmetrical to one another and are formed of a
  • Solenoid 216 includes a spool-like frame 238 (Fig. 20) having a tubular body 240 of
  • Solenoid 216 further includes an insulated electrical conductor 246 wrapped in multiple turns about tubular body 240.
  • Tubular body 240 tubular
  • body 240 defines or surrounds a central rectangular channel or lumen (not designated) which
  • Each casing part 226 and 228 has a main body 248 located in one plane and a pair of
  • Flanges 250 and 252 at opposite ends of the main body. Flanges 250 and 252 are disposed in
  • Main body 248 and flanges 250 and 252 are integrally formed to have rounded
  • Flanges 250 and 252 have a length equal to
  • main body 248 and concomitantly casing 224 are the width of main body 248 and concomitantly casing 224.
  • each casing part 230 and 232 has a main body 258 located in one plane and
  • Flanges 260 and 262 a pair of flanges 260 and 262 disposed at opposite ends of the main body. Flanges 260 and 262 are disposed at opposite ends of the main body. Flanges 260 and 262 are disposed at opposite ends of the main body. Flanges 260 and 262 are disposed at opposite ends of the main body. Flanges 260 and 262 are disposed at opposite ends of the main body. Flanges 260 and
  • flanges 260 and 262 are integrally or unitarily formed to have rounded external edges 264 and
  • Flanges 260 and 262 have a common length which is equal to a common width of
  • stationary magnetic core or anchor 220 and movable magnetic core or anchor 222 are stationary magnetic core or anchor 220 and movable magnetic core or anchor 222.
  • Casing parts 226, 228, 230, 232 are fit or locked together to form casing 224 as an
  • Openings or apertures 268 and 270 are, within acceptable tolerances, of
  • magnetic core 220 traverses opening or aperture 269 and is adhesively bonded to flanges 252
  • Movable magnetic core 222 is slidably inserted through opening or aperture 270.
  • Parts 226, 228, 230, and 232 are rigidly
  • stationary magnetic core 220 has a planar working surface
  • Fig. 22 depicts a modification of the electromagnet assembly of Figs. 19-21, wherein a
  • stationary magnetic core 276 is provided with a wedge-shaped recessed working surface 278
  • magnetic core 284 has a working surface 286 defining a conical recess which receives a
  • conical projection 288 defining a conical working surface of a movable magnetic core 290.
  • a stationary magnetic core 292 has a pyramidally shaped recess 294 defining a
  • a stationary magnetic core 300 has a substantially semi-spherical
  • Metal layers 234 of casing parts 226 and 228 are coiled or wound about a first axis
  • 308 and 310 are oriented at a right angle with respect to one another and with respect to axis 218 of solenoid 216.
  • Casing 224 (Figs. 19-21) has 'a generally right-rectangular prismatic configuration
  • casing 224 may, in some embodiments,
  • polygonal cross-sections will be of an equal number of sides (e.g., hexagonal).
  • the casing parts are arranged in opposed pairs, with
  • each pair having a winding axis oriented at an angles with respect to the other pairs of
  • Casing 224 is a magnetic conductor and serves to channel or collect magnetic field
  • magnetic field lines in the manner of a magnetic wave guide. As illustrated in Fig. 26, magnetic field lines
  • magnetic field lines 314 are spread out from the device.
  • casing parts 226, 228, 230, and 232 of layers of metal strips serves
  • Fig.27 is a schematic isometric view of a frame or holder 316 for use in forming
  • Frame 316 is a prismatic block provided along opposite faces 318 and 320 with parallel elongate grooves 322 and 324. Face 318 is formed along one
  • a leading edge 328 of a metal strip or sheet 330 is inserted
  • frame 316 is equal to a thickness H of metal strip 330, whereas a radius of curvature R2 of a
  • the wound metal strip 330 is cut by a laser
  • short-flange casing parts 230 and 232 are assembled to one another to form casing 224 as an
  • At least partially enclosed member having mutually aligned openings or apertures 268 and
  • solenoid 216 must be positioned relative to
  • casing parts 226, 228, 230, 232 prior to completing the assembly of the casing parts to one
  • stationary magnetic core 220 is inserted inside tubular body 240 of
  • solenoid frame 238 and then casing parts 226, 228, 230, and 232 are assembled about solenoid 216 and stationary magnetic core member 220.
  • Movable magnetic core 22 may also be
  • tubular body 240 prior to assembly of casing parts 226, 228, 230, 232
  • conductor 242 is wound about tubular body 240 prior to the
  • wound or coiled metal strips 330 are preferably subjected to deep annealing.
  • coiled metal strips 330 are only partially cut at grooves 322 and 324 and then subjected to
  • annealed strips are placed into a container (not shown) of epoxy varnish. Subsequently, the
  • This grinding is executed in a direction perpendicular to a direction of coiling of the
  • metal strip 330 is passed through a
  • a reciprocating magnetic core 344 has a magnetically conductive casing 346

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

La présente invention concerne un dispositif électromagnétique comprenant un solénoïde (24), un noyau magnétique stationnaire (26), un noyau magnétique mobile (28), et un boîtier (22). Le noyau magnétique stationnaire est fixe par rapport au solénoïde et il est disposé au moins en partie à l'intérieur du solénoïde. Le noyau magnétique stationnaire possède une section transversale polygonale dans un plan perpendiculaire à l'axe du solénoïde. Le noyau magnétique mobile est relié au solénoïde de façon qu'il peut effectuer un mouvement de translation par rapport à celui-ci et il est disposé en partie à l'intérieur du solénoïde afin d'effectuer un mouvement alternatif le long de l'axe du solénoïde. Le boîtier est placé autour du solénoïde et il comprend une pluralité de parties (226,228,230 et 232) imbriquées les unes dans les autres, couplées de façon rigide les unes aux autres. Chacune des parties du boîtier est formée d'une pluralité de couches d'une bande (234) de métal à conductivité magnétique enroulée.
PCT/US2000/019520 1999-07-21 2000-07-18 Ensemble aimant muni d'un element noyau a mouvement alternatif et procede de fabrication associe WO2001008174A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62195/00A AU6219500A (en) 1999-07-21 2000-07-18 Magnet assembly with reciprocatable core member and associated method of manufacture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14480699P 1999-07-21 1999-07-21
US60/144,806 1999-07-21

Publications (1)

Publication Number Publication Date
WO2001008174A1 true WO2001008174A1 (fr) 2001-02-01

Family

ID=22510223

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Application Number Title Priority Date Filing Date
PCT/US2000/019520 WO2001008174A1 (fr) 1999-07-21 2000-07-18 Ensemble aimant muni d'un element noyau a mouvement alternatif et procede de fabrication associe

Country Status (2)

Country Link
AU (1) AU6219500A (fr)
WO (1) WO2001008174A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018071946A3 (fr) * 2016-10-20 2018-07-05 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de chargement pour une machine-outil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595755A (en) * 1949-05-24 1952-05-06 Gen Electric Electromagnet
US4567007A (en) * 1980-08-29 1986-01-28 Ltv Aerospace And Defense Company Method of making carbon/carbon composites
US4626725A (en) * 1984-02-27 1986-12-02 Fanuc Ltd Synchronous rotary machine
US4673835A (en) * 1986-05-19 1987-06-16 Siemens Energy And Automation, Inc. Stator core having waved laminations
US6002191A (en) * 1998-06-19 1999-12-14 General Electric Company Paired interlocks for stacking of non-rotated lamination cores

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595755A (en) * 1949-05-24 1952-05-06 Gen Electric Electromagnet
US4567007A (en) * 1980-08-29 1986-01-28 Ltv Aerospace And Defense Company Method of making carbon/carbon composites
US4626725A (en) * 1984-02-27 1986-12-02 Fanuc Ltd Synchronous rotary machine
US4673835A (en) * 1986-05-19 1987-06-16 Siemens Energy And Automation, Inc. Stator core having waved laminations
US6002191A (en) * 1998-06-19 1999-12-14 General Electric Company Paired interlocks for stacking of non-rotated lamination cores

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018071946A3 (fr) * 2016-10-20 2018-07-05 Trumpf Maschinen Austria Gmbh & Co. Kg. Procédé de chargement pour une machine-outil
CN109922900A (zh) * 2016-10-20 2019-06-21 特鲁普机械奥地利有限公司及两合公司 定位弯曲工具的装置
AT522347A5 (de) * 2016-10-20 2020-10-15 Trumpf Maschinen Austria Gmbh & Co Kg Vorrichtung zum Positionieren eines Biegewerkzeuges
AT522347B1 (de) * 2016-10-20 2020-11-15 Trumpf Maschinen Austria Gmbh & Co Kg Vorrichtung zum Positionieren eines Biegewerkzeuges
CN109922900B (zh) * 2016-10-20 2020-11-20 特鲁普机械奥地利有限公司及两合公司 定位弯曲工具的方法
US11471927B2 (en) 2016-10-20 2022-10-18 Trumpf Maschinen Austria Gmbh & Co. Kg Loading method for a machine tool and tool transfer device
US11491530B2 (en) 2016-10-20 2022-11-08 Trumpf Maschinen Austria Gmbh & Co. Kg Device for positioning a bending tool

Also Published As

Publication number Publication date
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