JPWO2015083478A1 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JPWO2015083478A1
JPWO2015083478A1 JP2015551433A JP2015551433A JPWO2015083478A1 JP WO2015083478 A1 JPWO2015083478 A1 JP WO2015083478A1 JP 2015551433 A JP2015551433 A JP 2015551433A JP 2015551433 A JP2015551433 A JP 2015551433A JP WO2015083478 A1 JPWO2015083478 A1 JP WO2015083478A1
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Prior art keywords
rotating electrical
electrical machine
stator
coil
housing
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JP6215351B2 (en
Inventor
省三 川崎
省三 川崎
金澤　宏至
宏至 金澤
中山　賢治
賢治 中山
濱田　泰久
泰久 濱田
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers

Abstract

エンドプレートの孔を絶縁樹脂のコイル保持部でふさぐため固定子コイル端末の絶縁不良を防止すると共に異物の侵入を防ぎ、モータロックが発生することを防止することが可能である。Since the hole of the end plate is covered with the insulating resin coil holding portion, it is possible to prevent the insulation failure of the stator coil terminal and to prevent foreign matter from entering and prevent the motor lock from occurring.

Description

本発明は、ブラシレスモータのエンドコイルの接続構造とモータロックの防止構造に関するものである。   The present invention relates to an end coil connection structure and a motor lock prevention structure of a brushless motor.

回転電機においては、ステータコイルの端子をインバータ回路と接続するために端末台に固定する。ステータコイルの複数本の端末は互いの絶縁を確保するために絶縁性のガイドを設ける、またはチューブで被覆される。   In the rotating electrical machine, the terminal of the stator coil is fixed to the terminal block in order to connect to the inverter circuit. The plurality of ends of the stator coil are provided with insulating guides or covered with a tube in order to ensure insulation from each other.

端末をエンドコイル部から外部へ導出させる場合には、エンドコイル部の孔を通す必要がある。エンドコイルの孔には絶縁性ガイドを設け、端末間の絶縁を保って分離することで絶縁不良を防止することは可能である。   When the terminal is led out from the end coil part, it is necessary to pass the hole of the end coil part. It is possible to prevent an insulation failure by providing an insulating guide in the hole of the end coil and keeping the insulation between the terminals separated.

特開2012-249461号公報JP 2012-249461 A

金属製のエンドコイル部に孔を設けステータコイルの端末を通すことで外部に導出させると、孔を通して外部からモータの内部に異物が混入する虞がある。異物はステータ(固定子)とロータ(回転子)との間で回転をロックさせる可能性がある。異物の混入を防ぐために孔を小さくすると、異物は侵入しにくくなるが、端末を穴に挿入しにくくなり組み立て性が悪化する。   If a hole is provided in the metal end coil portion and the end of the stator coil is passed through to the outside, there is a possibility that foreign matter may enter the motor from the outside through the hole. Foreign matter may lock rotation between the stator (stator) and the rotor (rotor). If the hole is made small in order to prevent the entry of foreign matter, the foreign matter is less likely to enter, but the terminal is difficult to insert into the hole and the assemblability deteriorates.

回転子と、固定子と、前記固定子に巻装される固定子コイルと、前記回転子と前記固定子を収容するハウジングと、前記ハウジングの一端に配置されるエンドプレートと、を有する回転電機であって、前記エンドプレートは樹脂製のコイル保持部が嵌合する孔を有し、前記樹脂製のコイル保持部は、前記固定子コイルの端末が挿通する孔を有することを特徴とする回転電機である。   A rotating electrical machine having a rotor, a stator, a stator coil wound around the stator, a housing that houses the rotor and the stator, and an end plate that is disposed at one end of the housing The end plate has a hole into which a resin coil holding portion is fitted, and the resin coil holding portion has a hole through which the end of the stator coil is inserted. Electric.

エンドプレート(エンドコイル部)の孔を絶縁樹脂のコイル保持部でふさぐため固定子コイル端末の絶縁不良を防止すると共に異物の侵入を防ぎ、モータロックが発生することを防止することが可能である。   Since the hole of the end plate (end coil part) is blocked by the coil holding part of the insulating resin, it is possible to prevent the insulation failure of the stator coil terminal and to prevent foreign matter from entering, and to prevent the motor lock from occurring. .

本発明の実施形態に係る回転電機の外観図である。1 is an external view of a rotating electrical machine according to an embodiment of the present invention. 本発明の実施形態に係る回転電機の断面図である。It is sectional drawing of the rotary electric machine which concerns on embodiment of this invention. 本発明の実施形態に係るコイル貫通部の外観図である。It is an external view of the coil penetration part which concerns on embodiment of this invention. 本発明の実施形態に係るコイル貫通部の断面図である。It is sectional drawing of the coil penetration part which concerns on embodiment of this invention. 本発明の実施形態に係る絶縁ブッシュのフランジとの合わせ面の断面図である。It is sectional drawing of the mating surface with the flange of the insulation bush which concerns on embodiment of this invention.

以下、本発明の実施形態について図を用いて詳細に説明するが、本発明は以下の実施形態に限定されることなく、本発明の技術的な概念の中で種々の変形例や応用例をもその範囲に含むものである。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

図１は一例としての電動パワーステアリング装置に用いられる回転電機組立体１０を示しており、この回転電機組立体１０は回転電機１１とこの回転電機を駆動制御するインバータ制御部１２とより構成されている。   FIG. 1 shows a rotating electrical machine assembly 10 used in an electric power steering apparatus as an example, and this rotating electrical machine assembly 10 is composed of a rotating electrical machine 11 and an inverter control unit 12 that drives and controls the rotating electrical machine. Yes.

インバータ制御部１２は筺体内部にインバータ回路を構成する電力用半導体素子、この電力用半導体素子を駆動する駆動回路、この駆動回路を制御する制御回路等が内蔵されている。   The inverter control unit 12 includes a power semiconductor element that constitutes an inverter circuit, a drive circuit that drives the power semiconductor element, a control circuit that controls the drive circuit, and the like.

回転電機１１とインバータ制御部１２とは専用の固定ボルトで強固に固定され、両者が固定された回転電機組立体１０はパワーステアリング装置（図示せず）にボルト等で一体化されるものである。   The rotating electrical machine 11 and the inverter control unit 12 are firmly fixed with a dedicated fixing bolt, and the rotating electrical machine assembly 10 to which both are fixed is integrated with a power steering device (not shown) with a bolt or the like. .

次に、回転電機組立体１０からインバータ制御部１２を取り外した状態の回転電機１１の詳細な構成を図２に基づき説明する。   Next, a detailed configuration of the rotating electrical machine 11 with the inverter control unit 12 removed from the rotating electrical machine assembly 10 will be described with reference to FIG.

図２は回転電機１１の軸方向の断面図である。回転電機１１は大きく分けて、筺体部を構成するハウジング１３とフランジ１４(ハウジングの一端に配置される金属製のエンドプレート)、電動機部を構成する回転子１５と固定子１６とから構成されている。   FIG. 2 is a cross-sectional view of the rotating electrical machine 11 in the axial direction. The rotating electrical machine 11 is roughly divided into a housing 13 and a flange 14 (a metal end plate disposed at one end of the housing) constituting a housing part, and a rotor 15 and a stator 16 constituting an electric motor part. Yes.

ハウジング１３は一端に開口部１７を有した有底円筒状（いわゆるカップ状）に形成されており、この開口部１７を塞ぐようにフランジ１４がハウジング１３にトメワ２９により固定されている。   The housing 13 is formed in a bottomed cylindrical shape (so-called cup shape) having an opening 17 at one end, and the flange 14 is fixed to the housing 13 by a tome 29 so as to close the opening 17.

ハウジング１３の内周側に固定子１６が固定されている。固定子１６を構成する分割された固定コア１８が円形形状を保持した状態で、圧入或いは焼嵌めによって固定されている。この分割された固定コア１８は分割面を溶接、或いは溶接しないで円形に形成されている。   A stator 16 is fixed to the inner peripheral side of the housing 13. The divided fixed cores 18 constituting the stator 16 are fixed by press-fitting or shrink fitting while maintaining a circular shape. The divided fixed core 18 is formed in a circular shape with or without welding the divided surfaces.

固定コア１８にはボビン１９が取り付けられ、その外周部にコイル２０が巻回されている。コイル２０の口出し線は絶縁ブッシュ２１を還してバスバー２６に一体成型されたターミナル２７に接続されている。尚、コイル２０は２連続巻き、或いは４連続巻きした後に口出し線を出すようにするか、または、各固定コア１８に巻かれた状態で絶縁ブッシュ２１を還してターミナル２７に接続されている。また、ハウジング１３とボビン１９の間は隙間を設けても良いし、嵌合するようにしても良い。   A bobbin 19 is attached to the fixed core 18, and a coil 20 is wound around the outer periphery thereof. The lead wire of the coil 20 is connected to a terminal 27 formed integrally with the bus bar 26 by returning the insulating bush 21. In addition, the coil 20 is connected to the terminal 27 by returning the insulating bush 21 in a state where it is wound around each fixed core 18 after two or four continuous windings are taken out. . Further, a gap may be provided between the housing 13 and the bobbin 19 or may be fitted.

固定コア１８の内周側には回転子１５が回転可能に配置されている。回転子１５は、回転子軸２２、回転基体２３、磁石２４、磁石カバー２５から構成されている。   A rotor 15 is rotatably arranged on the inner peripheral side of the fixed core 18. The rotor 15 includes a rotor shaft 22, a rotating base 23, a magnet 24, and a magnet cover 25.

図３に示すように、磁石２４（図示せず）は磁石カバー２５により覆われており、これによって磁石２４の飛散の防止がなされている。   As shown in FIG. 3, the magnet 24 (not shown) is covered with a magnet cover 25, thereby preventing the magnet 24 from scattering.

尚、バスバー２６は各相のコイルと接続されるように配線され、入力端子２８により入力されるＵ相、Ｖ相、Ｗ相の電力が入力されている。   The bus bar 26 is wired so as to be connected to a coil of each phase, and U-phase, V-phase, and W-phase power input from the input terminal 28 is input.

以上は回転電機１１の基本的な構成であるのでこれ以上の説明は省略する。次に、本実施例の技術的な特徴について説明する。   Since the above is the basic configuration of the rotating electrical machine 11, further description will be omitted. Next, technical features of the present embodiment will be described.

図２に示したように、コイル端末は絶縁ブッシュの内径側を貫通し、ターミナル２７に接続される。本箇所にてコイル端末部との隙間を無くすことで、回転子と固定子間の隙間に混入を防止することが出来る。   As shown in FIG. 2, the coil terminal passes through the inner diameter side of the insulating bush and is connected to the terminal 27. By eliminating the gap with the coil terminal portion at this location, mixing into the gap between the rotor and the stator can be prevented.

図３にはコイル貫通部の概観図を示す。絶縁ブッシュは連結部を設け、一体とすることによって、複数個のエンドコイルが設けられた回転電機であっても簡易な組立にすることが可能となる。また、フランジ１４とバスバー２６との間に挟み込み、バスバー２６と共にねじで固定することでコンパクトにすることができる。   FIG. 3 shows an overview of the coil penetration portion. The insulating bush is provided with a connecting portion and is integrated, so that even a rotating electric machine provided with a plurality of end coils can be easily assembled. Moreover, it can be made compact by inserting | pinching between the flange 14 and the bus bar 26, and fixing with a bus bar 26 with a screw.

図４には絶縁ブッシュのコイル貫通部の断面一例を示す。コイル貫通部は絶縁ブッシュに設けられた孔であり、ハウジング１３の外側の開口を狭くし、固定子側(内側)の開口を広くするテーパ形状とすることで、固定子コイルの端末を挿入しやすくかつ、外部に向かっては位置決めが可能となり、更に、外部からの異物の混入を防ぐことができるようになる。また、絶縁ブッシュの外側開口をターミナルとの接続部に配置することで、コイル位置を自動で配置することが可能となる。   FIG. 4 shows an example of a cross section of the coil penetration portion of the insulating bush. The coil penetrating portion is a hole provided in the insulating bush, and the outer end of the housing 13 is narrowed and the opening on the stator side (inner side) is widened to insert the end of the stator coil. It is easy and can be positioned toward the outside, and can prevent foreign matters from entering. Further, by arranging the outer opening of the insulating bush at the connection portion with the terminal, the coil position can be automatically arranged.

さらに、絶縁ブッシュの樹脂を加熱すると収縮する性質を持つ熱収縮性の樹脂にすると、固定子コイルの端末を挿入した後に熱を加えることで、孔の径が収縮し、固定子コイルの端末をよりしっかりと固定するとともに、固定子コイルの端末と絶縁ブッシュの内径との間の隙間がさらに小さくなるので、外部からの異物の混入を防ぐことに役立つ。   Furthermore, if the resin of the insulating bush is made of heat-shrinkable resin that shrinks when heated, the hole diameter shrinks by applying heat after inserting the end of the stator coil, and the end of the stator coil is While fixing more firmly, since the clearance between the end of the stator coil and the inner diameter of the insulating bush is further reduced, it helps to prevent foreign matter from entering from the outside.

好ましくは、絶縁ブッシュに設けられた穴の内径にテーパを設け、外側（モータコイルの反対側）の内径を内側（モータコイル側）の内径よりも小さくしておくことで、固定子コイル端末をターミナル２７に溶接または溶着する時の熱を利用して、絶縁ブッシュに過熱を行うと、溶接または溶着部に近い絶縁ブッシュの外側の内径が収縮するため、コイル端末のしっかり保持する効果と異物の侵入を防ぐ効果が大きくなる。   Preferably, the inner diameter of the hole provided in the insulating bush is tapered, and the inner diameter of the outer side (opposite side of the motor coil) is made smaller than the inner diameter of the inner side (motor coil side). If the insulation bush is overheated by utilizing the heat generated when welding or welding to the terminal 27, the inner diameter of the outside of the insulation bush close to the weld or welded portion shrinks. The effect of preventing intrusion is increased.

図５に絶縁ブッシュのフランジとの合わせ面の断面の一例を示す。絶縁ブッシュとフランジとの印籠部に対して、軸方向の合わせ面を設けることで、絶縁ブッシュとフランジとの隙間が無くなり、外部からの異物の混入を防ぐことができるようになる。   FIG. 5 shows an example of a cross section of the mating surface with the flange of the insulating bush. By providing an axial alignment surface on the stamped portion between the insulating bush and the flange, there is no gap between the insulating bush and the flange, and foreign matter can be prevented from being mixed in from the outside.

以上より、絶縁ブッシュを設けることで、モータロックを防止することが可能であると共に、コイルとターミナルの接続位置を自動で配置することが可能であり組立を容易に行うことが可能となる。   As described above, by providing the insulating bush, it is possible to prevent the motor from being locked, and it is possible to automatically arrange the connection position between the coil and the terminal and to perform the assembly easily.

さらに、本実施例で説明したような、モータのハウジングにインバータ回路基板を収容するハウジングが一体で組みつけられる機電一体型の製品の場合には、インバータ回路を収容するハウジング内における異物の混入量の制限を緩和することができるという効果がある。これは、インバータ回路基板とそのハウジングを製造するうえでの異物混入管理が容易になり、コストを下げる。これは、本実施例においては、モータのハウジング外部から内部への異物の混入がしにくい構成となっているためである。   Further, in the case of an electromechanically integrated product in which the housing for housing the inverter circuit board is integrally assembled with the motor housing as described in the present embodiment, the amount of foreign matter mixed in the housing for housing the inverter circuit There is an effect that the restriction can be relaxed. This facilitates foreign matter contamination management in manufacturing the inverter circuit board and its housing, and reduces costs. This is because in this embodiment, it is difficult for foreign matter to enter from the outside to the inside of the motor housing.

１０…回転電機組立体、１１…回転電機、１２…インバータ制御部、
１３…ハウジング、１４…フランジ、１５…回転子、１６…固定子、１７…開口部、
１８…固定コア、１９…ボビン、２０…コイル、２１…絶縁ブッシュ、
２１ａ…絶縁ブッシュ連結部、２１ｂ…絶縁ブッシュ入り口、
２１c…絶縁ブッシュ合わせ部入り口、２２…回転子軸、２３…回転基体、２４…磁石、２５…磁石カバー、２６…バスバー、２７…ターミナル、２８…入力端子、２９…トメワDESCRIPTION OF SYMBOLS 10 ... Rotary electric machine assembly, 11 ... Rotary electric machine, 12 ... Inverter control part,
13 ... Housing, 14 ... Flange, 15 ... Rotor, 16 ... Stator, 17 ... Opening,
18 ... Fixed core, 19 ... Bobbin, 20 ... Coil, 21 ... Insulating bush,
21a ... Insulating bush connecting part, 21b ... Insulating bush entrance,
21c ... Insulation bushing entrance, 22 ... Rotor shaft, 23 ... Rotating base, 24 ... Magnet, 25 ... Magnet cover, 26 ... Busbar, 27 ... Terminal, 28 ... Input terminal, 29 ... Tomewa

Claims (6)

回転子と、固定子と、前記固定子に巻装される固定子コイルと、前記回転子と前記固定子を収容するハウジングと、前記ハウジングの一端に配置されるエンドプレートと、を有する回転電機であって、
前記エンドプレートは樹脂製のコイル保持部が嵌合する孔を有し、
前記樹脂製のコイル保持部は、前記固定子コイルの端末が挿通する孔を有する回転電機。A rotating electrical machine having a rotor, a stator, a stator coil wound around the stator, a housing that houses the rotor and the stator, and an end plate that is disposed at one end of the housing Because
The end plate has a hole into which a resin coil holding portion is fitted,
The resin coil holding portion is a rotating electrical machine having a hole through which an end of the stator coil is inserted. 請求項１記載の回転電機において、
前記孔は固定子側の開口面積よりも反対側の開口面積の方が小さい形状をしている回転電機。The rotating electrical machine according to claim 1, wherein
The rotary electric machine has a shape in which the opening area on the opposite side is smaller than the opening area on the stator side. 請求項１記載の回転電機において、
複数の樹脂製コイル保持部材を一体に成形している回転電機。The rotating electrical machine according to claim 1, wherein
A rotating electrical machine in which a plurality of resin coil holding members are integrally formed. 請求項１記載の回転電機において、
インバータ制御装置と一体構造になっている回転電機。The rotating electrical machine according to claim 1, wherein
A rotating electrical machine that is integrated with the inverter controller. 請求項１記載の回転電機において、
コイル保持部材とバスバーを一体成形した回転電機。The rotating electrical machine according to claim 1, wherein
A rotating electrical machine in which a coil holding member and bus bar are integrally molded. 請求項１記載の回転電機において、
前記樹脂製のコイル保持部と前記エンドプレートとの印籠部に対して、軸方向の合わせ面を設けた回転電機。The rotating electrical machine according to claim 1, wherein
A rotating electrical machine in which an axial alignment surface is provided to a stamped portion between the resin coil holding portion and the end plate.
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JP2005341640A (en) * 2004-05-24 2005-12-08 Koyo Seiko Co Ltd Stator of motor
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JPH0613367U (en) * 1992-07-21 1994-02-18 株式会社富士通ゼネラル motor
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