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WO1998010506A1 - Machine tournante electrique - Google Patents

Machine tournante electrique Download PDF

Info

Publication number
WO1998010506A1
WO1998010506A1 PCT/NO1997/000214 NO9700214W WO9810506A1 WO 1998010506 A1 WO1998010506 A1 WO 1998010506A1 NO 9700214 W NO9700214 W NO 9700214W WO 9810506 A1 WO9810506 A1 WO 9810506A1
Authority
WO
WIPO (PCT)
Prior art keywords
coils
armature
electric machine
machine
rotary electric
Prior art date
Application number
PCT/NO1997/000214
Other languages
English (en)
Inventor
Jon Lode
Original Assignee
Nyfotek As
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 Nyfotek As filed Critical Nyfotek As
Priority to AU38712/97A priority Critical patent/AU3871297A/en
Publication of WO1998010506A1 publication Critical patent/WO1998010506A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/54—Disc armature motors or generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/006—Structural associations of commutators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine

Definitions

  • This invention relates in general to a rotary electric machine comprising a stator with permanent magnets and a rotor or armature having an iron core and a winding, whereby the permanent magnets have a mu ber of magnetic poles being different from the number of coils in the armature winding. More particularly the invention is directed to the design of the armature winding .
  • Electic machines being of interest in this connection can be both DC machines and AC machines. Besides, the principles and solutions to be explained in the following description, are essentially useful in motors as well as in generators.
  • the armature winding is located in grooves in the armature iron core.
  • One coil of the winding encloses one or more grooves, where also a coil side of another coil is located. These grooves in the armature core reduce the iron area surrounded by each coil. It is an object of the invention to improve these relation- ships. Moreover, it is an object of the invention to provide an armature design that to a substantial degree improves the cooling of the machine during operation.
  • the rotary electric machine has novel and specific features consisting in the first place in that the armature winding comprises a number of discrete coils each provided with its iron core and so arranged that between the coils there exist generally radial air passages which contribute to the cooling of the machine during operation.
  • the combination of features stated here is considered to be novel and distinguished from relevant prior art, such as e.g. represented by EP 91.125, GB 1.299.057, GB 2.125.635 and perhaps in particular US 4.437.029.
  • Discrete coils as they are incorporated in the com- bination according to the invention result in an electric machine being convenient in production, and the coil design is very advantageous with respect to cooling and efficiency.
  • the latter factor is due to the fact that the winding will be short in relation to the iron area enclosed thereby.
  • the iron area being surrounded by the coil has no grooves and will be comparatively much larger than in traditional machines .
  • Fig. 1 shows an axial section through one embodiment of a DC machine (axial machine) , based upon the inven- tion
  • fig. 2 schematically shows the armature and coil system in the machine of fig. 1, fig. 3 in a corresponding manner and schematically shows the magnetic poles in the machine of fig. 1, fig. 4 in axial section shows another embodiment of a machine according to the invention, i.e. a radial machine
  • fig. 5 schematically shows the coil system and the magnetic poles in the machine of fig. 4.
  • the machine shown in fig. 1 comprises a stator housing or casing 2 with bearings for an axle l which carries an armature .
  • an iron core 10 with a coil 11 Supported by a central part of the armature there is shown an iron core 10 with a coil 11, whereby fig. 2 shows that the winding arrangement comprises a number of separate coils 11A, 11B, lie and so forth, i.e. a total number of coils equal to eleven.
  • the associated iron cores in fig. 2 are denoted 10A, 10B, IOC and so forth, respectively.
  • the coils 11 are wound about iron cores 10 being without the conventional grooves, and the cores can be made of common machine sheet or preferably according to the invention by employing iron powder. Powder cores are very advantageous in this connection, because the magnetic field directions do not lie in one and the same plane in the machine according to the invention.
  • the coils 11A-C with associated iron cores 10A-C and so forth constitute separate or discrete coils being so arranged that there are formed radial air passages between the coils, as illu- strated with arrows 19A and 19B between the coils 11A and 11B as well as 11B and lie, respectively.
  • the rotating armature will have an effect similar to a centrifugal fan, so that the air flowing through will result in a very efficient cooling of both the armature and the surrounding structure.
  • the stator housing 2 has suitable venting openings (not shown) for the circulation of air to and from the surroundings .
  • stator 2 there are mounted permanent magnets as shown at 3A and 3B in fig. 1, namely at either side of the armature iron core 10, the intermediate air gaps being denoted 6A and 6B, respectively, in fig. 1.
  • the magnetizing direction in the two permanent magnets is indicated with arrows in these.
  • an iron circuit in order that the magnetic field can be closed through the stator.
  • Fig. 3 illustrates how magnetic poles corresponding to a complete set of permanent magnets, can be provided, i.e. in the form of a number of magnetic poles 13A, 13B and 13C and so forth with alternate polarity (N resp. S) as required for a correct function of the electric machine.
  • the number of magnetic poles is equal to 10, which is one less than the number of coils 11A, 11B, 11C and so forth, as illustrated in fig. 2.
  • the embodiment of the electric machine shown in fig. 4 and fig. 5 is a DC machine based on the same principles as the machine according to figs. 1, 2 and 3.
  • fig. 4 there is shown a stator at 22 with bearings for an armature having an axle 21 and discrete armature cores 30 with associated cores 31.
  • the stator permanent magnets are indicated at 23, with associated pole pieces 24.
  • fig. 4 shows a commutator with a supporting member 35 for segments and a cooperating brush 25, quite in anology to corresponding elements 15 and
  • fig. 5 there is also in the machine of fig. 4, provided a number of discrete coils 31A, 31B and so forth, with associated cores 30A, 30B and so forth. Between adjacent coils there is also here provided for air passages, one air passage being indicated with the arrow 39A between coils 31A and 3IB.
  • the armature according to the embodiment of fig. 5 has altogether 11 cores, which means that the number of magnetic poles in the stator should be either ten or twelve, in order to obtain an optimum of the reluctance relationship.
  • the stator magnet system is also shown schematically in fig. 5, wherein a permanent magnet 23A with associated pole piece 24A are indicated. In the case of a corresponding three-phase machine, the number of coils should be able to be divided by three. Thus it will be suitable to employ e.g. nine coils and eight or ten magnetic poles.
  • the embodiment of figs. 4 and 5 involve more practical design details than the embodiment of figs, l, 2 and 3, because, inter alia, there will be more space for the permanent magnets and these will be cheaper.
  • the armature cores 30 in this embodiment can be made as powder cores .
  • the commutator design in the machine described here can be mainly the same in the two embodiments referred to, and the particular commutator design described in Norwegian patent application No. 96.3687 can be empl ⁇ yd with advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne une machine tournante électrique comprenant un stator à aimants permanents et un rotor à un noyau de fer et un enroulement. L'enroulement du rotor est constitué d'un certain nombre de bobinages discrets (11A-11C) pourvus chacun d'un noyau de fer (10A-10C) et agencés de façon à dégager pour l'air des passages radiaux (19A, 19B) qui contribuent au refroidissement de la machine pendant son fonctionnement.
PCT/NO1997/000214 1996-09-03 1997-08-21 Machine tournante electrique WO1998010506A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38712/97A AU3871297A (en) 1996-09-03 1997-08-21 Rotary electric machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO963686 1996-09-03
NO963686A NO302789B1 (no) 1996-09-03 1996-09-03 Roterende elektrisk maskin

Publications (1)

Publication Number Publication Date
WO1998010506A1 true WO1998010506A1 (fr) 1998-03-12

Family

ID=19899786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1997/000214 WO1998010506A1 (fr) 1996-09-03 1997-08-21 Machine tournante electrique

Country Status (3)

Country Link
AU (1) AU3871297A (fr)
NO (1) NO302789B1 (fr)
WO (1) WO1998010506A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7834503B2 (en) * 2004-08-20 2010-11-16 Clearwater Holdings, Ltd. Immersed windings, monopole field, electromagnetic rotating machine
JP5406390B1 (ja) * 2013-02-01 2014-02-05 森内 アツ子 多目的軸型３ａｂｃモータ
GB2579616A (en) * 2018-12-06 2020-07-01 Greenspur Renewables Ltd Enhancements to cooling means for axial flux generators
WO2021162913A1 (fr) * 2020-02-12 2021-08-19 Forum Us, Inc. Appareil et procédés d'extrémité motrice à entraînement électrique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091125A1 (fr) * 1982-04-07 1983-10-12 Roger Martire Moteur électrique à aimants permanents
US4437029A (en) * 1981-10-16 1984-03-13 Itsuki Ban Direct current motor
US4876472A (en) * 1987-09-30 1989-10-24 Shicoh Engineering Co., Ltd. Five-phase dc motor with non-overlapping armature windings
US5202599A (en) * 1992-05-08 1993-04-13 Kao Wen Chung Electric motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437029A (en) * 1981-10-16 1984-03-13 Itsuki Ban Direct current motor
EP0091125A1 (fr) * 1982-04-07 1983-10-12 Roger Martire Moteur électrique à aimants permanents
US4876472A (en) * 1987-09-30 1989-10-24 Shicoh Engineering Co., Ltd. Five-phase dc motor with non-overlapping armature windings
US5202599A (en) * 1992-05-08 1993-04-13 Kao Wen Chung Electric motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7834503B2 (en) * 2004-08-20 2010-11-16 Clearwater Holdings, Ltd. Immersed windings, monopole field, electromagnetic rotating machine
JP5406390B1 (ja) * 2013-02-01 2014-02-05 森内 アツ子 多目的軸型３ａｂｃモータ
GB2579616A (en) * 2018-12-06 2020-07-01 Greenspur Renewables Ltd Enhancements to cooling means for axial flux generators
GB2579616B (en) * 2018-12-06 2023-05-31 Time To Act Ltd Enhancements to cooling means for axial flux generators
WO2021162913A1 (fr) * 2020-02-12 2021-08-19 Forum Us, Inc. Appareil et procédés d'extrémité motrice à entraînement électrique
US11757339B2 (en) 2020-02-12 2023-09-12 Forum Us, Inc. Electrically driven power end apparatus and methods

Also Published As

Publication number Publication date
NO963686L (no) 1998-03-04
NO302789B1 (no) 1998-04-20
AU3871297A (en) 1998-03-26
NO963686D0 (no) 1996-09-03

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