JP2021151043A - Bus bar for motor - Google Patents

Bus bar for motor Download PDF

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Publication number
JP2021151043A
JP2021151043A JP2020047364A JP2020047364A JP2021151043A JP 2021151043 A JP2021151043 A JP 2021151043A JP 2020047364 A JP2020047364 A JP 2020047364A JP 2020047364 A JP2020047364 A JP 2020047364A JP 2021151043 A JP2021151043 A JP 2021151043A
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Prior art keywords
side portion
bus bar
winding
motor
terminal
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JP2020047364A
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JP7327228B2 (en
JP2021151043A5 (en
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佳紀 秋津
Yoshinori AKITSU
佳紀 秋津
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Denso Corp
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Denso Corp
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Priority to JP2020047364A priority Critical patent/JP7327228B2/en
Priority to PCT/JP2021/010291 priority patent/WO2021187400A1/en
Publication of JP2021151043A publication Critical patent/JP2021151043A/en
Publication of JP2021151043A5 publication Critical patent/JP2021151043A5/ja
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

To provide a bus bar for a motor, having a low resistance loss as a whole, which can be manufactured with a satisfactory yield.SOLUTION: A bus bar 6 (U) to be used for a motor includes: a winding side part 61 connected to the winding of a stator; a terminal side part 62 connected to an external connector; and a joint part 63 which joins the winding side part 61 with the terminal side part 62. The winding side part 61 is formed of pure copper having relatively lower electric resistivity, whereas the winding side part 62 is formed of brass having relatively higher electric resistivity. The terminal side part 62 has a terminal part 623 on a first piece 621, which extends substantially in parallel to a motor center shaft, and the winding side part 61 is connected to a second fragment piece 622, extending to the periphery of the center shaft, in a manner to extend in the extension direction of the second piece 622. The joint part 63 includes a weld part 631 which straddles both of the winding side part 61 and the terminal side part 62.SELECTED DRAWING: Figure 4

Description

本発明は、モータに使用されるモータ用バスバーに関する。 The present invention relates to a motor busbar used in a motor.

従来、モータの巻線に接続される巻線側部分と、外部機器の端子が接続される端子側部分と、を備えたバスバーが知られている。例えば、特許文献１には、モータの中心軸と平行に延びる端子側部分と、中心軸の周囲を延びる巻線側部分とを備え、全体が同じ材質の導電材料で一体形成されたバスバーが記載されている。 Conventionally, a bus bar having a winding side portion connected to a winding of a motor and a terminal side portion to which a terminal of an external device is connected is known. For example, Patent Document 1 describes a bus bar that includes a terminal side portion that extends parallel to the central axis of the motor and a winding side portion that extends around the central axis, and is integrally formed of a conductive material that is the same material as a whole. Has been done.

特開２０１９−１７０１３７号公報JP-A-2019-170137

ところが、バスバー全体を同じ材質の導電材料、例えば黄銅で形成すると、バスバー全体の抵抗損失が多く、発熱量が増加するという問題がある。また、中心軸と平行に延びる端子側部分と中心軸の周囲を延びる巻線側部分とを打ち抜き加工によって一体に形成すると、材料ロスが増加し、歩留まりが低下するという問題点があった。 However, if the entire bus bar is made of a conductive material of the same material, for example, brass, there is a problem that the resistance loss of the entire bus bar is large and the amount of heat generated is increased. Further, if the terminal side portion extending parallel to the central axis and the winding side portion extending around the central axis are integrally formed by punching, there is a problem that material loss increases and the yield decreases.

本発明の目的は、全体としての抵抗損失が少なく、かつ歩留まり良く製作できるモータ用バスバーを提供することにある。 An object of the present invention is to provide a bus bar for a motor, which has a low resistance loss as a whole and can be manufactured with a high yield.

上記課題を解決するために、本発明のモータ用バスバー（６）は、モータ（１）の巻線（５）に電気的に接続される巻線側部分（６１）と、外部機器（７）が電気的に接続される端子部（６２３）を有する端子側部分（６２）と、巻線側部分および端子側部分を接合する接合部分（６３）と、を備え、巻線側部分および端子側部分がそれぞれ異なる電気抵抗率の導電材料で形成されている。 In order to solve the above problems, the motor bus bar (6) of the present invention includes a winding side portion (61) electrically connected to the winding (5) of the motor (1) and an external device (7). A terminal side portion (62) having a terminal portion (623) electrically connected to the coil, and a joint portion (63) for joining the winding side portion and the terminal side portion. The parts are made of conductive materials having different electrical resistances.

本発明のモータ用バスバーによれば、巻線側部分および端子側部分がそれぞれ異なる電気抵抗率の導電材料で形成されているので、バスバー全体としての抵抗損失を少なくし、発熱を抑えることができる。また、巻線側部分および端子側部分を別々に加工し、材料ロスを抑え、バスバーを歩留まり良く製作することができる。 According to the bus bar for a motor of the present invention, since the winding side portion and the terminal side portion are formed of conductive materials having different electrical resistivitys, the resistance loss of the entire bus bar can be reduced and heat generation can be suppressed. .. Further, the winding side portion and the terminal side portion can be processed separately to suppress material loss, and the bus bar can be manufactured with a good yield.

本発明の一実施形態を示すモータの断面図である。It is sectional drawing of the motor which shows one Embodiment of this invention. 図１のＩＩ−ＩＩ線断面図である。FIG. 2 is a cross-sectional view taken along the line II-II of FIG. バスバーホルダ、ターミナルホルダおよびエンドフレームの斜視図である。It is a perspective view of a bus bar holder, a terminal holder and an end frame. バスバーの実施形態を示す斜視図である。It is a perspective view which shows the embodiment of a bus bar. （ａ）端子側部分の打ち抜き形状を示す展開図、（ｂ）巻線側部分の打ち抜き形状を示す展開図である。It is a developed view which shows (a) the punched shape of the terminal side portion, and (b) is the developed view which shows the punched shape of the winding side part. 比較例の一体型バスバーの打ち抜き形状を示す展開図である。It is a developed view which shows the punching shape of the integrated bus bar of a comparative example.

＜一実施形態＞
以下、本発明による一実施形態のモータ用バスバーを図面に基づいて説明する。
まず、本実施形態を適用したモータの構成について説明する。
図１に示すモータ１は、車両のブレーキ油圧を発生させるシステムで用いられる３相ブラシレスモータであって、モータハウジング２が底付きの本体２１と、本体２１の上端開放部２１１を覆うエンドフレーム２２とからなっている。本体２１の内側には、ステータ３とロータ４とが収められ、ステータ３の複数のティース（図示略）に３相の巻線５が巻き回されている。各巻線５の端部５１は、別々のバスバー６を介して外部機器のコネクタ７（以下、外部コネクタ７）に電気接続される。 <One Embodiment>
Hereinafter, a bus bar for a motor according to an embodiment of the present invention will be described with reference to the drawings.
First, the configuration of the motor to which this embodiment is applied will be described.
The motor 1 shown in FIG. 1 is a three-phase brushless motor used in a system for generating brake hydraulic pressure of a vehicle, and is an end frame 22 in which a motor housing 2 covers a main body 21 with a bottom and an upper end opening portion 211 of the main body 21. It consists of. A stator 3 and a rotor 4 are housed inside the main body 21, and a three-phase winding 5 is wound around a plurality of teeth (not shown) of the stator 3. The end portion 51 of each winding 5 is electrically connected to the connector 7 of the external device (hereinafter referred to as the external connector 7) via a separate bus bar 6.

ロータ４にはシャフト８が固定され、シャフト８の上端が上軸受９によりエンドフレーム２２に支持され、シャフト８の下端が下軸受１１によりハウジング本体２１の底壁部２１２に支持されている。そして、外部コネクタ７から巻線５に電源が供給されると、ステータ３とロータ４との間に形成された回転磁界によって、シャフト８がロータ４と一緒に中心軸Ｏの周りで回転される。なお、本明細書では、図１において、バスバー６が突出する方向をモータ１の「上」、反対側を「下」と呼ぶ。 A shaft 8 is fixed to the rotor 4, the upper end of the shaft 8 is supported by the upper bearing 9 on the end frame 22, and the lower end of the shaft 8 is supported by the lower bearing 11 on the bottom wall portion 212 of the housing body 21. Then, when power is supplied from the external connector 7 to the winding 5, the shaft 8 is rotated around the central axis O together with the rotor 4 by the rotating magnetic field formed between the stator 3 and the rotor 4. .. In this specification, in FIG. 1, the direction in which the bus bar 6 protrudes is referred to as "upper" of the motor 1, and the opposite side is referred to as "lower".

図１、図２に示すように、ステータ３の上には、３相のバスバー６を保持するバスバーホルダ１４が設置されている。バスバーホルダ１４は、樹脂等の絶縁材料からなる円環部１４１を備え、円環部１４１の中央にエンドフレーム２２の胴部２２１が嵌入する開口部１４２が形成されている。また、円環部１４１には、巻線５の端部５１が挿入される複数の切欠部１４３、バスバー６を位置決めする突起または穴からなる複数の位置決め部１４４、およびステータ３に掛止される複数の掛止片１４５が形成されている。 As shown in FIGS. 1 and 2, a bus bar holder 14 for holding the three-phase bus bar 6 is installed on the stator 3. The bus bar holder 14 includes an annular portion 141 made of an insulating material such as resin, and an opening 142 into which the body portion 221 of the end frame 22 is fitted is formed in the center of the annular portion 141. Further, the ring portion 141 is hooked on a plurality of notch portions 143 into which the end portion 51 of the winding 5 is inserted, a plurality of positioning portions 144 composed of protrusions or holes for positioning the bus bar 6, and a stator 3. A plurality of hook pieces 145 are formed.

図１、図３に示すように、エンドフレーム２２の上には、３相のバスバー６の端子部６２３を保持するターミナルホルダ１５が装着されている。ターミナルホルダ１５は、エンドフレーム２２のフランジ部２２２に被さる円板部１５１と、エンドフレーム２２の胴部２２１に内側から嵌着される円筒部１５２とを備え、全体が樹脂等の絶縁材料でリング状に形成されている。そして、円板部１５１にスリーブ１５３が立設され、スリーブ１５３の３つの貫通孔１５４にバスバー６の端子側部分６２が貫通保持されている。なお、エンドフレーム２２のフランジ部２２２には、バスバー６が嵌合するスリット２２３が形成されている。 As shown in FIGS. 1 and 3, a terminal holder 15 for holding a terminal portion 623 of the three-phase bus bar 6 is mounted on the end frame 22. The terminal holder 15 includes a disk portion 151 that covers the flange portion 222 of the end frame 22, and a cylindrical portion 152 that is fitted from the inside to the body portion 221 of the end frame 22, and is entirely ringed with an insulating material such as resin. It is formed in a shape. A sleeve 153 is erected on the disk portion 151, and a terminal side portion 62 of the bus bar 6 is held through the three through holes 154 of the sleeve 153. The flange portion 222 of the end frame 22 is formed with a slit 223 into which the bus bar 6 is fitted.

次に、バスバー６の構成について詳述する。
図４は、図２に示した３相のバスバー６のうち符号（６Ｕ）が追記されたバスバーを示す。バスバー６Ｕは、３相のうち対応する一つの相の２本の巻線５が接続される巻線側部分６１と、外部コネクタ７に接続される端子部６２３を有する端子側部分６２と、巻線側部分６１および端子側部分６２を接合する接合部分６３とを備え、全体が略Ｌ字形に構成されている。製作時には、巻線側部分６１および端子側部分６２が別部品として打ち抜き加工され、両方の部品の接合部分６３が溶接によって接続される。 Next, the configuration of the bus bar 6 will be described in detail.
FIG. 4 shows a bus bar to which a reference numeral (6U) is added among the three-phase bus bars 6 shown in FIG. The bus bar 6U is wound with a winding side portion 61 to which two windings 5 of one of the three phases corresponding to each other are connected, and a terminal side portion 62 having a terminal portion 623 connected to the external connector 7. A joint portion 63 for joining the wire side portion 61 and the terminal side portion 62 is provided, and the entire structure is substantially L-shaped. At the time of manufacture, the winding side portion 61 and the terminal side portion 62 are punched as separate parts, and the joint portion 63 of both parts is connected by welding.

巻線側部分６１および端子側部分６２は、それぞれ異なる電気抵抗率の導電材料で形成されている。本実施形態では、巻線側部分６１が相対的に低い電気抵抗率の第１導電材料で形成され、端子側部分６２が相対的に高い電気抵抗率の第２導電材料で形成されている。第１導電材料としては、巻線側部分６１が接続される巻線５と実質的に同じ材質の純銅が用いられている。第２導電材料としては、端子側部分６２が接続される外部コネクタ７の端子材料と実質的に同じ材質の黄銅が用いられている。 The winding side portion 61 and the terminal side portion 62 are formed of conductive materials having different electrical resistivitys. In the present embodiment, the winding side portion 61 is formed of a first conductive material having a relatively low electrical resistivity, and the terminal side portion 62 is formed of a second conductive material having a relatively high electrical resistivity. As the first conductive material, pure copper, which is substantially the same material as the winding 5 to which the winding side portion 61 is connected, is used. As the second conductive material, brass, which is substantially the same material as the terminal material of the external connector 7 to which the terminal side portion 62 is connected, is used.

図３、図４に示すように、巻線側部分６１は、モータ１の中心軸Ｏの周囲を延びる横長に形成され、巻線側部分６１の一端に端子側部分６２が接合される巻線側接合部６１１が設けられている。巻線側接合部６１１と反対側の端部には、２本の巻線５の端部５１（図１参照）が別々接続される２つの接続片６１２が形成されている。接続片６１２と巻線側接合部６１１との間には、バスバーホルダ１４の位置決め部１４４に係止される巻線側係止片６１３が形成されている。そして、巻線側係止片６１３によりバスバーホルダ１４を介して、巻線側部分６１がステータ３に対する定位置に係止されている。 As shown in FIGS. 3 and 4, the winding side portion 61 is formed in a horizontally long shape extending around the central axis O of the motor 1, and the terminal side portion 62 is joined to one end of the winding side portion 61. A side joint 611 is provided. At the end opposite to the winding side joint 611, two connection pieces 612 are formed to which the ends 51 (see FIG. 1) of the two windings 5 are separately connected. A winding side locking piece 613 that is locked to the positioning portion 144 of the bus bar holder 14 is formed between the connecting piece 612 and the winding side joint portion 611. Then, the winding side portion 61 is locked at a fixed position with respect to the stator 3 by the winding side locking piece 613 via the bus bar holder 14.

端子側部分６２は、モータ１の中心軸Ｏと略平行に延びる縦長の第１片６２１と、中心軸Ｏの周囲を延びる第２片６２２とからなり、第１片６２１の上端に端子部６２３を備え、第２片６２２の先端に端子側接合部６２４を備えている。巻線側部分６１は第２片６２２の延長方向に延び、巻線側接合部６１１が端子側接合部６２４に接合される。第１片６２１と第２片６２２との交差部６２５には、バスバーホルダ１４の係止孔（図示略）に係止される端子側係止片６２６が設けられ、端子側部分６２が端子側係止片６２６によりバスバーホルダ１４を介してステータ３に対する定位置に係止されている。 The terminal side portion 62 is composed of a vertically long first piece 621 extending substantially parallel to the central axis O of the motor 1 and a second piece 622 extending around the central axis O, and a terminal portion 623 at the upper end of the first piece 621. The terminal side joint portion 624 is provided at the tip of the second piece 622. The winding side portion 61 extends in the extension direction of the second piece 622, and the winding side joint portion 611 is joined to the terminal side joint portion 624. The intersection 625 between the first piece 621 and the second piece 622 is provided with a terminal-side locking piece 626 that is locked in a locking hole (not shown) of the bus bar holder 14, and the terminal-side portion 62 is on the terminal side. It is locked in place with respect to the stator 3 via the bus bar holder 14 by the locking piece 626.

バスバー６の接合部分６３には、溶接部６３１が巻線側接合部６１１および端子側接合部６２４の両方に跨るように形成されている。図４に示す溶接部６３１は、スポット溶接により点状に形成されているが、巻線側接合部６１１および端子側接合部６２４の周縁に沿って線状の溶接部を形成してもよい。なお、図２に示された、３つのバスバー６は、巻線側部分の６１の長さが相違する点を除き、バスバー６Ｕと略同様に構成されている。 The joint portion 63 of the bus bar 6 is formed so that the welded portion 631 straddles both the winding side joint portion 611 and the terminal side joint portion 624. Although the welded portion 631 shown in FIG. 4 is formed in a dot shape by spot welding, a linear welded portion may be formed along the peripheral edges of the winding side joint portion 611 and the terminal side joint portion 624. The three bus bars 6 shown in FIG. 2 are configured in substantially the same manner as the bus bars 6U, except that the lengths of 61 on the winding side portion are different.

次に、上記のように構成されたバスバー６の作用効果について悦明する。
本実施形態では、巻線側部分６１が端子側部分６２よりも電気抵抗率の低い純銅で形成されているので、バスバー６の全体を黄銅で形成した場合と比較し、全体としての抵抗損失を少なくし、発熱を抑えることができる。バスバー６の製作にあたっては、それぞれの導電板から巻線側部分６１および端子側部分６２がプレスで打ち抜かれ、接合部分６３に溶接部６３１が形成される。 Next, I am pleased about the action and effect of the bus bar 6 configured as described above.
In the present embodiment, since the winding side portion 61 is made of pure copper having a lower electrical resistivity than the terminal side portion 62, the resistance loss as a whole is reduced as compared with the case where the entire bus bar 6 is made of brass. It can be reduced and heat generation can be suppressed. In manufacturing the bus bar 6, the winding side portion 61 and the terminal side portion 62 are punched out from the respective conductive plates by a press, and the welded portion 631 is formed at the joint portion 63.

溶接部６３１は、材質が異なる２部品を強固に接合し、接合部分６３に充分な溶着面積を確保し、抵抗損失を低減させる。また、２部品を打ち抜くことで、端子側部分６２および巻線側部分６１を図５（ａ），（ｂ）に示すような形状で加工することができる。したがって、打ち抜き加工に伴う材料ロスを少なくし、バスバー６を歩留まりよく製作することができる。 The welded portion 631 firmly joins two parts made of different materials, secures a sufficient welding area in the joined portion 63, and reduces resistance loss. Further, by punching out the two parts, the terminal side portion 62 and the winding side portion 61 can be processed into the shapes shown in FIGS. 5A and 5B. Therefore, the material loss due to the punching process can be reduced, and the bus bar 6 can be manufactured with a high yield.

＜比較例＞
図６は、比較例として、巻線側部分７１および端子側部分７２が一体化されたバスバー７０の打ち抜き形状を示す。図５および図６を対比すると、本実施形態によるバスバー６は比較例のバスバー７０と比べて、製作時の材料ロスが少ないことがわかる。また、本実施形態のバスバー６は、端子側部分６２が黄銅で形成されているため、バスバー６の全体としての材料費を低減することができる。 <Comparison example>
FIG. 6 shows a punched shape of the bus bar 70 in which the winding side portion 71 and the terminal side portion 72 are integrated as a comparative example. Comparing FIGS. 5 and 6, it can be seen that the bus bar 6 according to the present embodiment has less material loss during production than the bus bar 70 of the comparative example. Further, in the bus bar 6 of the present embodiment, since the terminal side portion 62 is made of brass, the material cost of the bus bar 6 as a whole can be reduced.

＜他の実施形態＞
次に、本発明の他の実施形態について説明する。
（１）上記実施形態では、巻線側部分６１の電気抵抗率が端子側部分６２の電気抵抗率よりも低く設定されているが、他の実施形態において、端子側部分の電気抵抗率を巻線側部分の電気抵抗率よりも低く設定することも可能である。こうすれば、外部機器を発熱から保護する必要がある用途において、端子側部分の抵抗損失を少なくすることができる。 <Other embodiments>
Next, other embodiments of the present invention will be described.
(1) In the above embodiment, the electrical resistivity of the winding side portion 61 is set lower than the electrical resistivity of the terminal side portion 62, but in other embodiments, the electrical resistivity of the terminal side portion is wound. It is also possible to set it lower than the electrical resistivity of the wire side portion. By doing so, it is possible to reduce the resistance loss of the terminal side portion in the application where it is necessary to protect the external device from heat generation.

（２）上記実施形態では、巻線側部分６１および端子側部分６２をステータ３の定位置に係止するために、巻線側係止片６１３および端子側係止片６２６がバスバーホルダ１４を介してステータ３に間接的に係止されているが、他の実施形態において、巻線側係止片および端子側係止片をステータ３に直接的に係止できるように設けることも可能である。 (2) In the above embodiment, the winding side locking piece 613 and the terminal side locking piece 626 hold the bus bar holder 14 in order to lock the winding side portion 61 and the terminal side portion 62 to the fixed positions of the stator 3. Although it is indirectly locked to the stator 3 via, in other embodiments, it is also possible to provide the winding side locking piece and the terminal side locking piece so that they can be directly locked to the stator 3. be.

（３）上記実施形態では、接合部分６３がモータ１の中心軸Ｏの周囲を延びる部位に配置されているが、他の実施形態において、接合部分をモータ中心軸と平行に延びる部位に配置することも可能である。
その他、本発明は、上記各実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲で、各部の形状および構成を適宜に変更して実施することも可能である。 (3) In the above embodiment, the joint portion 63 is arranged at a portion extending around the central axis O of the motor 1, but in other embodiments, the joint portion is arranged at a portion extending parallel to the central axis of the motor. It is also possible.
In addition, the present invention is not limited to each of the above embodiments, and the shape and configuration of each part can be appropriately changed and implemented without departing from the spirit of the invention.

１・・・モータ、３・・・ステータ、４・・・ロータ、５・・・巻線、
６・・・モータ用バスバー、７・・・外部コネクタ（外部機器）、
６１・・・巻線側部分、６２・・・端子側部分、６２３・・・端子部、
６３・・・接合部分、６３１・・・溶接部。 1 ... motor, 3 ... stator, 4 ... rotor, 5 ... winding,
6 ... Bus bar for motor, 7 ... External connector (external device),
61 ... Winding side part, 62 ... Terminal side part, 623 ... Terminal part,
63 ... Joint part, 631 ... Welded part.

Claims (5)

モータ（１）の巻線（５）に接続される巻線側部分（６１）と、
外部機器（７）に接続される端子部（６２３）を有する端子側部分（６２）と、
前記巻線側部分および前記端子側部分を接合する接合部分（６３）と、を備え、
前記巻線側部分および前記端子側部分がそれぞれ異なる電気抵抗率の導電材料で形成されているモータ用バスバー（６）。 The winding side portion (61) connected to the winding (5) of the motor (1) and
A terminal side portion (62) having a terminal portion (623) connected to the external device (7),
A joining portion (63) for joining the winding side portion and the terminal side portion is provided.
A bus bar for a motor (6) in which the winding side portion and the terminal side portion are made of conductive materials having different electrical resistivitys. 前記巻線側部分は、前記端子側部分の導電材料よりも低い電気抵抗率を有する導電材料で形成されている請求項１に記載のモータ用バスバー。 The bus bar for a motor according to claim 1, wherein the winding side portion is formed of a conductive material having a lower electrical resistivity than the conductive material of the terminal side portion. 前記巻線側部分の導電材料が純銅であり、前記端子側部分の導電材料が黄銅である請求項２に記載のモータ用バスバー。 The bus bar for a motor according to claim 2, wherein the conductive material of the winding side portion is pure copper, and the conductive material of the terminal side portion is brass. 前記接合部分に、前記巻線側部分および前記端子側部分の両方に跨る溶接部（６３１）が形成されている請求項１〜３の何れか一項に記載のモータ用バスバー。 The motor bus bar according to any one of claims 1 to 3, wherein a welded portion (631) straddling both the winding side portion and the terminal side portion is formed in the joint portion. 前記端子側部分は、前記モータの中心軸（Ｏ）と略平行に延びる第１片（６２１）と、前記中心軸の周囲に延びる第２片（６２２）とを含み、前記巻線側部分が前記第２片の延長方向へ延びるように前記端子側部分に接続されている請求項１〜４の何れか一項に記載のモータ用バスバー。 The terminal side portion includes a first piece (621) extending substantially parallel to the central axis (O) of the motor and a second piece (622) extending around the central axis, and the winding side portion includes the winding side portion. The motor bus bar according to any one of claims 1 to 4, which is connected to the terminal side portion so as to extend in the extension direction of the second piece.
JP2020047364A 2020-03-18 2020-03-18 motor Active JP7327228B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002058228A (en) * 2000-06-02 2002-02-22 Moric Co Ltd Brushless dc motor
JP2003217707A (en) * 2001-11-15 2003-07-31 D D K Ltd Connector for double face contact
WO2019064877A1 (en) * 2017-09-29 2019-04-04 日本電産株式会社 Bus bar unit and motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002058228A (en) * 2000-06-02 2002-02-22 Moric Co Ltd Brushless dc motor
JP2003217707A (en) * 2001-11-15 2003-07-31 D D K Ltd Connector for double face contact
WO2019064877A1 (en) * 2017-09-29 2019-04-04 日本電産株式会社 Bus bar unit and motor

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