WO1997010640A1 - Machine electrique rotative - Google Patents

Machine electrique rotative Download PDF

Info

Publication number
WO1997010640A1
WO1997010640A1 PCT/JP1995/001836 JP9501836W WO9710640A1 WO 1997010640 A1 WO1997010640 A1 WO 1997010640A1 JP 9501836 W JP9501836 W JP 9501836W WO 9710640 A1 WO9710640 A1 WO 9710640A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
stator
stator core
core member
electric machine
Prior art date
Application number
PCT/JP1995/001836
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Yasuhara
Asaji Yamada
Hiromitsu Tomihisa
Tsugio Sekine
Yukio Endo
Matsutoshi Iharae
Ryuichi Iwata
Original Assignee
Hitachi, Limited
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 Hitachi, Limited filed Critical Hitachi, Limited
Priority to PCT/JP1995/001836 priority Critical patent/WO1997010640A1/fr
Publication of WO1997010640A1 publication Critical patent/WO1997010640A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots

Definitions

  • the present invention relates to a rotating electric machine having a laminated stator core, such as an induction motor or a synchronous machine, and more particularly to a rotating electric machine suitable for a relatively small-capacity general-purpose induction motor.
  • a relatively small-capacity general-purpose induction senile motor having a structure as shown in Fig. 6 has been generally used.
  • reference numeral 1 denotes a housing, which is also called a frame or a frame.
  • the housing 1 is formed almost in a shape of a ferrous material such as iron or a light alloy material such as aluminum. It constitutes the motor casing.
  • L a is a heat radiating fin which has a strip shape extending in the axial direction and is formed radially on the outer periphery of the housing 1 by integral construction with the housing 1.
  • end brackets also called bearing brackets, which store the bearings 4 A and 4 B so that they can be attached to both ends of the no. It has become.
  • Reference numeral 3 denotes a stator, which is wound around a stator core 3A made by laminating thin sheets of silicon sales plates and a plurality of slots provided on the inner periphery of the stator core 3A. And the stator coil 3B.
  • the stator core 3A is obtained by cutting a thin silicon sales plate into a shape as shown in Fig. 7, such as punching with a breath, etc., and laminating it to a predetermined thickness.
  • a tooth portion (teeth portion) 3D serving as a magnetic path is formed on the inner peripheral portion of the slot, thereby forming a slot 3C, thereby forming a slot 3C.
  • the stator coil 3 B is wound on C.
  • Reference numeral 5 denotes a rotor having a rotating shaft 6, and the rotating shaft 6 is rotatably held by bearings 4A and 4B of end brackets 2A and 2B. 3 in It is configured to rotate at a predetermined position opposite to the stator 3.
  • the stator 3 is inserted into the housing 1 in advance and attached to the inner peripheral wall thereof, and then the rotor 5 is inserted into the stator 3. Then, with the bearings 4 A and 4 B fitted to the rotating shaft 6, the end brackets 2 A and 2 B are fitted to both ends of the housing 1, respectively.
  • a plurality of bolts (not shown) are attached to the housing 1 for mounting and assembling.
  • the outer fan 9 (external cooling fan) is attached to the part of the end bracket 2A protruding from the bearing 4A.
  • Reference numeral 10 denotes an end cover, which forms a cover for covering the outer fan 9.
  • the end cover 10 is provided with a ventilation hole 10a serving as a ventilation inlet for taking in outside air by the outside fan 9, and the opening 10a is provided with a ventilation hole.
  • the opposite side is formed in an open cylindrical or irregular circular shape, which comprises a radial gap 10b between the re-end bracket 2A and the outer diameter of the housing 1.
  • a ventilation outlet is formed.
  • the rotor 5 is mounted in the housing 1 of the rotating shaft 6 at a position facing the stator 2 as described above.
  • the rotor 5 has a secondary conductor bar (not shown).
  • an end ring 7 is provided, and an inner fan 8 (internal cooling fan) is formed integrally with the end ring 7.
  • the fan 8 consists of a plurality of blade blades protruding in the axial direction from the end face of the end ring 7, which can circulate air inside the motor and provide a cooling function. I am trying to get it. That is, the air flow generated by the inner fan 8 passes while cooling the rotor 5, the end ring 7, the stator coil 3B, and both end faces of the stator core 3A while cooling the housing. This allows heat to be obtained when passing along the inner surfaces of the end brackets 2A and 2B, which have a relatively low temperature rise as compared with 1.
  • the stator core is divided into a plurality of stator cores so that the teeth forming the slots of the stator core are separated.
  • the stator coil is made by dividing it into parts, and the stator core is combined with the stator coil that has been wound and shaped in advance, and then joined together to assemble the stator.
  • the stator core 3A is separated by a slot along the circumferential direction of the circular yoke (yoke).
  • the core portion 3 ′ that is, the divided core member, is made of an iron plate having a small number of layers, and is wound on the stator core slot in advance.
  • the assembled iron cores are combined and joined to assemble the stator 3.
  • 33 c and 33 d are the coil ends of the stator coil 3 B, and these coil ends 33 c and 33 d are the stator coils.
  • the stator core 3A When the coil 3B is inserted into the slot 3C of the stator core 3A and is assembled, as shown in the figure, the stator core 3A respectively has one end in the axial direction and the other end face in the other direction. T will be exposed By the way, if the iron core is divided in this way, the magnetic circuit by the iron core is also divided.
  • An object of the present invention is to sufficiently address the above-mentioned problems of the prior art, and it is possible to sufficiently suppress the increase in magnetic resistance accompanying the division of the stator core without significantly improving the dimensional accuracy of the core.
  • An object of the present invention is to provide a small and light rotating electric machine with good performance. Disclosure of the invention
  • a stator core is divided into a plurality of core members, and the stator core is assembled in advance by combining the core members with a stator coil that has been wound and shaped in advance.
  • an adhesive containing magnetic fine particles is interposed on a joint surface between the core members.
  • the material of the magnetic fine particles it is desirable to use a magnetic material having a high magnetic permeability such as permalloy, for example, and the particle size is preferably 10 / imm or less.
  • an epoxy-based or silicon-based adhesive in order to easily form a layer of magnetic fine particles on the end face of the iron core member.
  • ferrite-based iron powder may be used as the magnetic fine particles, but even in this case, the particle size of the iron powder is 10 / mm or less. Is good.
  • the magnetic flux can pass well, but the iron loss represented by the hysteresis loss is much smaller than that of the silicon steel sheet. There is almost no widespread decline in performance due to.
  • the adhesive containing the magnetic fine particles is preferably applied in advance to the joint surface of the iron core member. Then, when the joint surfaces are assembled together, the adhesive is attached to the end surfaces of the core members, so that the core members can be easily joined together.
  • FIG. 1 is a plan view showing an example of a stator core according to the present invention
  • FIG. 2 is an enlarged front view showing one of core members constituting a stator core according to the present invention
  • FIG. 3 is a fixation according to the present invention
  • FIG. 4 is an enlarged front view showing the other of the iron core members constituting the iron core
  • FIG. 4 is an explanatory view showing a state where the stator coil is inserted into the stator core according to the present invention
  • FIG. 5 is an assembly of the split stator core.
  • FIG. 6 is a perspective view showing the state
  • FIG. 6 is an exploded side view showing an example of a rotary turret
  • FIG. 7 is a plan view showing a conventional example of a stator core.
  • FIG. 1 shows the stator core 3A viewed from the axial direction when the present invention is applied to the induction motor shown in FIG. 6, and the stator core 3A is shown in FIG. 2 and FIG. 3
  • a plurality of silicon steel sheets of two shapes, a first iron core member 31 and a second iron core member 32, are laminated so as to have a predetermined thickness. It is made.
  • the stator core 3A is formed by alternately arranging the first core members 31 and the second core members 32 in an annular shape. Configuration.
  • the first core member 31 includes a back portion 31a serving as a weft portion of the stator core 3A, and an inner central portion of the back portion 31a.
  • the toothed portion has a rod-like portion that protrudes toward the center to form a tooth portion, that is, a tooth portion 31b, and a slot 3 is provided on both sides of the tooth portion 31b.
  • a cut-out portion 31c for forming C is provided, and is formed substantially in a T-shape as a whole.
  • projections 3 Id are formed on both sides 31 f of the back 31 a of the core member 31 so as to be able to engage with the second core member 32.
  • a chamfer 31 e is formed at an upper part which is closer to the outer periphery than the protrusions 31 d.
  • the magnetic fine particles mixed and dispersed in the adhesive layer 34 As a material of the magnetic fine particles mixed and dispersed in the adhesive layer 34, as described above, it is desirable to use a magnetic material having a high magnetic permeability such as, for example, permalloy. And its particle size should be less than 10 / imm.
  • the magnetic fine particles are mixed and dispersed in an epoxy-based or silicon-based adhesive and applied as an adhesive layer 34.
  • the rod-shaped second core member 32 is made up of a back portion 32 a made the same length as the back portion 31 a of the iron core member 31, and a core member 31. And a tooth portion 32b having the same width as that of the tooth portion 31b and extending straight in the center direction and having a tongue piece 32c protruding in the width direction at the tip.
  • a concave groove 32 d is formed on both sides 35 of the back part 32 a so as to be able to engage with the projection 31 d of the back part 31 a of the core member 31.
  • a chamfer 32 e is formed on the upper portion on the outer peripheral side of the concave groove 32 d like the core member 31. Also, by stacking a predetermined number of the rod-shaped core members 32 in the axial direction, a ferromagnetic bar-shaped core member 32 is formed as shown in FIG.
  • the adhesive layer 34 is applied to the joint end surface of the iron core member 31, but may be formed on both side surfaces 35 serving as the joint end surface of the rod-shaped iron core member 32. It may be formed on both surfaces.
  • stator 3 by combining the stator core 3B with the single-layer core member 310 and the laminated bar-shaped core material 3200 will be described.
  • the core member 320 When the laminated bar-shaped core member 320 is inserted from both sides of the laminated core member 310 toward the center of the stator 3 and outward, the core member is inserted into the groove 32 of each bar-shaped core member 32.
  • the projections 3 1 d of the 3 1 When the projections 3 1 d of the 3 1 are engaged with each other, they are positioned with each other, and in this state, the teeth 3 2 b of the laminated rod-shaped core member 32 0 and the ridge layer core member 3 10
  • the slot 3C is defined by the tongue part 31b.
  • the circumferential width of the back portion 31a of each core member 31 is determined by the space of the slot 3C and the tooth portion adjacent thereto. 31 b and the space of the slot 3 C adjacent thereto are formed in a size capable of forming the space.
  • the stator coil 3B is previously wound and formed into a shape that can be housed in the slot 3C. That is, in the stator coil 3B, a plurality of conductors are wound in a toroidal shape, and the portion inserted into the slot 3C has an angle corresponding to the angular position of the slot 3C. It is molded into.
  • the coil end portion 33 c of the stator coil 3 B 3 3d means that when the stator coil 3B is inserted into the slot 3C of the stator core 3A, the stator core 3A projects II to the upper and lower parts in the axial direction of the stator core 3A. .
  • the coil ends 33c and 33d of the stator coil 3B are inserted into the slot, the coil ends 33c and 33d of the stator coil 3B are inserted into the adjacent slots.
  • stator 3 when assembling the stator 3, a predetermined number of preformed stator coils 3B are arrayed and held in a predetermined position on a jig (not shown).
  • the laminated core member 310 on which the core member 31 is previously laminated is moved from the outer peripheral direction by a moving means such as an index (not shown), and the notch on both sides of the teeth 3 lb of the laminated core member 310 is removed.
  • the slightly layered iron core 320 is moved from inside the stator coil 3 B and the laminated core member 310 to a moving means (not shown).
  • the tooth portions 31b of the core member 310 and the tooth portions of the rod-shaped core member 320 are formed.
  • the stator can be assembled with the stator coil 3B housed in the slot 3C defined by 3b. To become.
  • each ridge layer core member has a manufacturing dimensional error and an assembly error, as described above, the respective laminated core members 310 and 320 are assembled. When attached, there is a slight gap in the part where the laminated core members are engaged with each other, that is, the engaging surface.
  • the adhesive layer 34 containing the magnetic fine particles is always applied to one of the joining surfaces serving as the engaging portions, even if a gap is generated in the engaging portion.
  • An adhesive layer 34 intervenes there and is filled with magnetic fine particles. Therefore, the magnetic flux flows well through the magnetic fine particles, and even if there is a gap, it does not function as an air gap, and the increase in magnetic resistance is reliably suppressed, and the increase in the exciting current can be prevented.
  • the magnetic fine particles have an extremely fine iron particle size of ⁇ ⁇ or less, and the fine particles are dispersed in the adhesive material. The losses are so small that they are not a problem.
  • the hysteresis loss of the above-described high-permeability magnetic material such as permalloy is as small as about 15 of electrolytic iron, and as a result, the iron loss due to the magnetic fine particles is extremely small as a whole. According to the present invention, it is possible to easily provide a small and lightweight rotating electric machine having sufficiently high performance.
  • the use of the split stator core can sufficiently improve the occupation rate of the stator coil in the stator slot.
  • a rotating electric machine can be easily provided.

Landscapes

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

Abstract

Cette invention concerne une nouvelle machine électrique rotative possédant un système de noyau de stator de type séparé, laquelle machine comporte un noyau de stator (3A) comprenant un premier élément noyau (31) et un second élément noyau (32). Les deux éléments noyaux sont combinés sur une bobine (3B) de stator qui a été enroulée et mise en forme à l'avance, puis joints à l'aide d'un adhésif contenant de fines particules magnétiques. Lorsque le noyau de stator est assemblé en joignant plusieurs éléments noyaux, on assiste d'habitude à la formation d'espaces d'air entre ces derniers. Toutefois, d'après cette invention, l'adhésif contenant les fines particules magnétiques remplit ces espaces, ce qui, d'un point de vue magnétique, équivaut à un état où aucun espace n'est présent. Il est ainsi possible de limiter suffisamment l'augmentation de la réluctance provoquée par des noyaux séparés.
PCT/JP1995/001836 1995-09-14 1995-09-14 Machine electrique rotative WO1997010640A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1995/001836 WO1997010640A1 (fr) 1995-09-14 1995-09-14 Machine electrique rotative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1995/001836 WO1997010640A1 (fr) 1995-09-14 1995-09-14 Machine electrique rotative

Publications (1)

Publication Number Publication Date
WO1997010640A1 true WO1997010640A1 (fr) 1997-03-20

Family

ID=14126263

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/001836 WO1997010640A1 (fr) 1995-09-14 1995-09-14 Machine electrique rotative

Country Status (1)

Country Link
WO (1) WO1997010640A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2331859A (en) * 1997-11-28 1999-06-02 Asea Brown Boveri Magnetic cores for rotating electric machines
JP2002518975A (ja) * 1998-06-18 2002-06-25 ハネウェル・インターナショナル・インコーポレーテッド 放射状磁束電動機用アモルファス金属ステータ
JP2006238612A (ja) * 2005-02-25 2006-09-07 Nippon Steel Corp 電動機の分割型固定子およびその製造方法
JP2006246544A (ja) * 2004-12-20 2006-09-14 Nippon Steel Corp 電動機の分割型固定子
JP2006296075A (ja) * 2005-04-08 2006-10-26 Nippon Steel Corp 分割型固定子および電動機
JP2007159187A (ja) * 2005-12-01 2007-06-21 Mitsubishi Electric Corp 回転電機の固定子鉄心
JP2010119163A (ja) * 2008-11-11 2010-05-27 Mitsubishi Electric Corp 圧縮機、圧縮機の組立設備、及び、圧縮機の組立方法
JP2011244675A (ja) * 2010-05-21 2011-12-01 Ihi Corp 分割型ステータの製造方法及び分割型ステータ
JP2015083871A (ja) * 2013-10-17 2015-04-30 エスカエフ・マニュティック・メシャトロニク ラジアル磁気軸受および製造方法
JP2019080454A (ja) * 2017-10-26 2019-05-23 トヨタ自動車株式会社 ステータコア

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54114704A (en) * 1978-02-09 1979-09-07 Blum Eisen & Metallind Electric appliance with at least one movable part when charged

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54114704A (en) * 1978-02-09 1979-09-07 Blum Eisen & Metallind Electric appliance with at least one movable part when charged

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2331859A (en) * 1997-11-28 1999-06-02 Asea Brown Boveri Magnetic cores for rotating electric machines
JP2002518975A (ja) * 1998-06-18 2002-06-25 ハネウェル・インターナショナル・インコーポレーテッド 放射状磁束電動機用アモルファス金属ステータ
JP2006246544A (ja) * 2004-12-20 2006-09-14 Nippon Steel Corp 電動機の分割型固定子
JP4500182B2 (ja) * 2004-12-20 2010-07-14 新日本製鐵株式会社 電動機の分割型固定子
JP2006238612A (ja) * 2005-02-25 2006-09-07 Nippon Steel Corp 電動機の分割型固定子およびその製造方法
JP4500180B2 (ja) * 2005-02-25 2010-07-14 新日本製鐵株式会社 電動機の分割型固定子の製造方法
JP2006296075A (ja) * 2005-04-08 2006-10-26 Nippon Steel Corp 分割型固定子および電動機
JP2007159187A (ja) * 2005-12-01 2007-06-21 Mitsubishi Electric Corp 回転電機の固定子鉄心
JP2010119163A (ja) * 2008-11-11 2010-05-27 Mitsubishi Electric Corp 圧縮機、圧縮機の組立設備、及び、圧縮機の組立方法
JP2011244675A (ja) * 2010-05-21 2011-12-01 Ihi Corp 分割型ステータの製造方法及び分割型ステータ
JP2015083871A (ja) * 2013-10-17 2015-04-30 エスカエフ・マニュティック・メシャトロニク ラジアル磁気軸受および製造方法
JP2019080454A (ja) * 2017-10-26 2019-05-23 トヨタ自動車株式会社 ステータコア

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