JP6662008B2 - Stator, motor, and stator manufacturing method - Google Patents

Stator, motor, and stator manufacturing method Download PDF

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JP6662008B2
JP6662008B2 JP2015236660A JP2015236660A JP6662008B2 JP 6662008 B2 JP6662008 B2 JP 6662008B2 JP 2015236660 A JP2015236660 A JP 2015236660A JP 2015236660 A JP2015236660 A JP 2015236660A JP 6662008 B2 JP6662008 B2 JP 6662008B2
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core
stator
claw
portions
shaped magnetic
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JP2017103957A (en
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佳朗 竹本
佳朗 竹本
匡史 松田
匡史 松田
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Denso Corp
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Denso Corp
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Priority to JP2015236660A priority Critical patent/JP6662008B2/en
Priority to US15/562,928 priority patent/US20180269729A1/en
Priority to CN201680008480.3A priority patent/CN107251369A/en
Priority to DE112016005533.1T priority patent/DE112016005533T5/en
Priority to PCT/JP2016/085256 priority patent/WO2017094689A1/en
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Description

本発明は、ステータ、モータ及びステータの製造方法に関する。   The present invention relates to a stator, a motor, and a method for manufacturing a stator.

従来、例えば特許文献1に示すように、所謂ランデル型(コンシクエントポール型)構造のステータと、該ステータと径方向に対向する永久磁石を磁極としたロータとを備えたモータが知られている。ランデル型構造のステータは、周方向に複数の爪状磁極を有する環状のステータコアを対で用い、対のステータコアの各爪状磁極が周方向に交互となるように組み合わされるとともに、その対のステータコアの軸方向間にコイル部を配置し、各爪状磁極を互いに異なる磁極として機能させるようになっている。   2. Description of the Related Art Conventionally, as shown in Patent Document 1, for example, a motor including a so-called Landel type (consequent pole type) structure stator and a rotor having a permanent magnet as a magnetic pole facing the stator in a radial direction is known. . The stator of the Landel type structure uses a pair of annular stator cores having a plurality of claw-shaped magnetic poles in the circumferential direction, and the stator cores of the pair of stator cores are combined so that the claw-shaped magnetic poles are alternately arranged in the circumferential direction. The coil portions are arranged in the axial direction, and the claw-shaped magnetic poles function as mutually different magnetic poles.

また、ステータの各ステータコアは、例えば、ステータコアの爪状磁極とは径方向において反対側に爪状磁極と同方向に延びるコアバック部を有する。このコアバック部をステータコアに設けることによって磁気飽和が抑えられている。   Further, each stator core of the stator has, for example, a core back portion extending in the same direction as the claw-shaped magnetic poles on the opposite side in the radial direction from the claw-shaped magnetic poles of the stator core. By providing this core back portion on the stator core, magnetic saturation is suppressed.

特開2007−181303号公報JP 2007-181303 A

ところで、上記のようなステータでは、コアバック部を設けることでコア部材(ステータコア)における磁気飽和を抑えているが、爪状磁極を含めてコア部材(ステータコア)を構成する構成部品が複雑となっていた。   By the way, in the above-described stator, magnetic saturation in the core member (stator core) is suppressed by providing the core back portion, but the components constituting the core member (stator core) including the claw-shaped magnetic poles are complicated. I was

本発明は、上記課題を解決するためになされたものであって、その目的は、コア部材の構成部品を簡素化することができるステータ、モータ及びステータの製造方法を提供することにある。   The present invention has been made to solve the above problems, and an object of the present invention is to provide a stator, a motor, and a method of manufacturing a stator that can simplify the components of a core member.

上記課題を解決するステータは、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第1コア部と、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第2コア部と、前記第1コア部及び前記第2コア部によって軸方向に挟持されるコイルと、を備えたステータであって、前記第1及び第2コア部の爪状磁極とは径方向反対側に、前記第1及び第2コア部とは別体であって磁性部材からなるコアバック部が設けられ、前記第1コア部及び前記第2コア部は、径方向の前記コアバック部が位置する側において、前記爪状磁極側に窪んだ凹部が設けられ、前記凹部に前記コアバック部が位置するA stator for solving the above-mentioned problems includes a first core portion having a plurality of claw-shaped magnetic poles extending in a circumferential direction from a disc-shaped core base in a circumferential direction, and a claw extending in an axial direction from the disc-shaped core base. A stator comprising: a second core portion having a plurality of magnetic poles in a circumferential direction; and a coil axially sandwiched by the first core portion and the second core portion, wherein the first and second cores are provided. A core back portion made of a magnetic member and provided separately from the first and second core portions is provided on a radially opposite side of the claw-shaped magnetic pole of the portion, and the first core portion and the second core portion are provided. The concave portion is provided on the side where the core back portion is located in the radial direction on the claw-shaped magnetic pole side, and the core back portion is located in the concave portion .

この構成によれば、第1及び第2コア部の爪状磁極とは径方向反対側に、第1及び第2コア部とは別体であって磁性部材からなるコアバック部が設けられるため、コアバック部を同一部品にそれぞれ設けた場合と比較して各部品の構造を簡素化することができる。   According to this configuration, the core back portion made of a magnetic member is provided separately from the first and second core portions on the radially opposite side of the claw-shaped magnetic poles of the first and second core portions. The structure of each component can be simplified as compared with the case where the core back portion is provided on the same component.

この構成によれば、凹部にコアバック部が設けられるため、コアバック部によって第1及び第2コア部同士の周方向位置決めを行うことができる。
上記ステータにおいて、前記第1コア部と、前記第2コア部と、前記コイルとを有するステータ部が軸方向に複数積層され、複数の前記ステータ部を積層した状態で軸方向両側から挟持する挟持部を有することが好ましい。
According to this configuration, since the core back portion is provided in the concave portion, the core back portion can position the first and second core portions in the circumferential direction.
In the above-described stator, a plurality of stator portions having the first core portion, the second core portion, and the coil are laminated in the axial direction, and a plurality of the stator portions are laminated and sandwiched from both axial sides. It is preferable to have a part.

この構成によれば、第1コア部と、第2コア部と、コイルとを有するステータ部が軸方向に複数積層され、複数のステータ部を積層した状態で軸方向両側から挟持する挟持部を有するため、挟持部によって複数のステータ部を積層した状態で挟持固定することができる。   According to this configuration, a plurality of stator portions having the first core portion, the second core portion, and the coil are stacked in the axial direction, and the holding portion for holding the plurality of stator portions in a stacked state from both sides in the axial direction is provided. Therefore, the plurality of stator portions can be sandwiched and fixed by the sandwiching portion in a state of being stacked.

上記ステータにおいて、前記挟持部は、複数の前記ステータ部を積層した状態で軸方向一方側に位置する第1挟持部と、複数の前記ステータ部を積層した状態で軸方向他方側に位置する第2挟持部と、前記第1挟持部及び前記第2挟持部の間を接続する接続部とを備え、前記接続部の一部として前記コアバック部が設けられることがこのましい。   In the above stator, the holding portion is a first holding portion positioned on one side in the axial direction when a plurality of the stator portions are stacked, and a first holding portion positioned on the other side in the axial direction when a plurality of the stator portions are stacked. It is preferable that the core back portion be provided as a part of the connecting portion, comprising: a second holding portion; and a connecting portion connecting between the first holding portion and the second holding portion.

この構成によれば、挟持部は、複数のステータ部を積層した状態で軸方向一方側に位置する第1挟持部と、複数の前記ステータ部を積層した状態で軸方向他方側に位置する第2挟持部と、第1挟持部及び前記第2挟持部の間を接続する接続部とを備え、前記接続部の一部として前記コアバック部が設けられる。即ち、挟持部にコアバック部を設けることで挟持固定を行いつつコアバック部の効果を付与することができる。また挟持部とコアバック部を別体とした場合と比較して部品点数の増加を抑えることができる。   According to this configuration, the holding portion includes a first holding portion that is located on one side in the axial direction when a plurality of stator portions are stacked, and a first holding portion that is located on the other side in the axial direction when the plurality of stator portions are stacked. A second holding portion, and a connecting portion connecting between the first holding portion and the second holding portion, wherein the core back portion is provided as a part of the connecting portion. That is, by providing the core back portion in the holding portion, the effect of the core back portion can be provided while holding and fixing. In addition, an increase in the number of parts can be suppressed as compared with a case where the holding portion and the core back portion are formed separately.

また上記課題を解決するモータは、上記いずれかに記載のステータを備える。
この構成によれば、上記何れかに記載の効果と同様の効果を奏するモータを提供することができる。
According to another aspect of the present invention, there is provided a motor including the stator described above.
According to this configuration, it is possible to provide a motor having the same effect as any of the effects described above.

また上記課題を解決するモータの製造方法は、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第1コア部と、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第2コア部と、前記第1コア部及び前記第2コア部によって軸方向に挟持されるコイルと、を備えたステータの製造方法であって、前記第1コア部及び前記第2コア部は、圧縮成形によって成形された圧粉磁心であり、磁性部材でなる別体のコアバック部が前記爪状磁極とは径方向反対側において当接配置されるとともに、前記第1コア部及び前記第2コア部は、径方向の前記コアバック部が位置する側において、前記爪状磁極側に窪んだ凹部が設けられ、前記凹部に前記コアバック部が位置するFurther, a method of manufacturing a motor that solves the above-described problem includes a first core portion having a plurality of claw-shaped magnetic poles extending in a circumferential direction from a disc-shaped core base in a circumferential direction, and A method of manufacturing a stator, comprising: a second core portion having a plurality of claw-shaped magnetic poles extending in a circumferential direction; and a coil axially held between the first core portion and the second core portion. The first core portion and the second core portion are powder magnetic cores formed by compression molding, and a separate core back portion made of a magnetic member abuts on a side radially opposite to the claw-shaped magnetic pole. The first core portion and the second core portion are provided with a concave portion that is recessed toward the claw-shaped magnetic pole on a side where the core back portion is located in a radial direction, and the core back portion is provided in the concave portion. Is located .

この構成によれば、第1コア部及び前記第2コア部は、圧縮成形によって成形された圧粉磁心であり、磁性部材でなる別体のコアバック部が爪状磁極とは径方向反対側において当接配置される。このため、第1及び第2コア部の爪状磁極とは径方向反対側に、第1及び第2コア部とは別体であって磁性部材からなるコアバック部が設けられるため、コアバック部を同一部品にそれぞれ設けた場合と比較して各部品の構造を簡素化することができる。   According to this configuration, the first core portion and the second core portion are powder magnetic cores formed by compression molding, and a separate core back portion made of a magnetic member is on the side opposite to the claw-shaped magnetic pole in the radial direction. At the contact position. For this reason, a core back portion that is separate from the first and second core portions and made of a magnetic member is provided on the opposite side of the claw-shaped magnetic poles of the first and second core portions in the radial direction. The structure of each part can be simplified as compared with the case where the parts are provided on the same part.

本発明のステータ、モータ及びステータの製造方法によれば、コア部材の構成部品を簡素化することができる。   ADVANTAGE OF THE INVENTION According to the stator, the motor, and the manufacturing method of a stator of this invention, the component parts of a core member can be simplified.

一実施形態におけるモータの断面図。FIG. 2 is a cross-sectional view of the motor according to the embodiment. 同形態のモータの分解斜視図。FIG. 3 is an exploded perspective view of the motor of the same embodiment. 同形態のステータの分解斜視図。The exploded perspective view of the stator of the same form. 同形態のステータの断面斜視図。Sectional perspective view of the stator of the same form.

以下、モータの一実施形態について説明する。
図1に示すように、本実施形態のモータMは、ブラシレスモータであって、ロータ10及びステータ20とを有する。
Hereinafter, an embodiment of the motor will be described.
As shown in FIG. 1, the motor M of the present embodiment is a brushless motor, and has a rotor 10 and a stator 20.

図1及び図2に示すように、ロータ10は、磁性体よりなるロータコア11と、ロータコア11に固着された磁石12,13とを有する。
ロータコア11は、ロータ10の軸線Lを中心とする円筒状をなす内周側円筒部14と、軸線Lを中心とする円筒状をなし、内周側円筒部14よりも外周側に位置する外周側円筒部15と、内周側円筒部14と外周側円筒部15の軸方向一端を繋ぐ上底部16とを有している。上底部16は、軸線Lに対して垂直をなす平板状に形成されている。ロータコア11は、内周側円筒部14の内周面が支軸17に対して軸受18を介して回転可能に支持される。
As shown in FIGS. 1 and 2, the rotor 10 has a rotor core 11 made of a magnetic material, and magnets 12 and 13 fixed to the rotor core 11.
The rotor core 11 has an inner peripheral cylindrical portion 14 having a cylindrical shape centered on the axis L of the rotor 10 and an outer peripheral portion having a cylindrical shape centered on the axis L and located on an outer peripheral side of the inner cylindrical portion 14. It has a side cylindrical portion 15 and an upper bottom portion 16 connecting one end in the axial direction of the inner cylindrical portion 14 and the outer cylindrical portion 15. The upper bottom part 16 is formed in a flat plate shape perpendicular to the axis L. In the rotor core 11, the inner peripheral surface of the inner peripheral side cylindrical portion 14 is rotatably supported on a support shaft 17 via a bearing 18.

外周側円筒部15の内周面には、A相用の磁石12と、B相用の磁石13とが固着されている。磁石12,13は軸方向に並んで配置されており、磁石12は後述の第1ステータ部21と径方向に対向し、磁石13は後述の第2ステータ部22と径方向に対向するようになっている。各磁石12,13は径方向に磁化され、N極・S極が周方向において等間隔に交互に構成されている。   An A-phase magnet 12 and a B-phase magnet 13 are fixed to the inner peripheral surface of the outer cylindrical portion 15. The magnets 12 and 13 are arranged side by side in the axial direction. The magnet 12 radially opposes a first stator 21 described later, and the magnet 13 radially opposes a second stator 22 described later. Has become. Each of the magnets 12 and 13 is magnetized in the radial direction, and N poles and S poles are alternately arranged at equal intervals in the circumferential direction.

ステータ20は、ハウジングHに固定されるものであり、円環状をなす第1ステータ部21と、円環状をなす第2ステータ部22と、第1ステータ部21及び第2ステータ部22をハウジングHに対して固定するための固定部40とを有する。   The stator 20 is fixed to the housing H, and includes an annular first stator portion 21, an annular second stator portion 22, and the first stator portion 21 and the second stator portion 22. And a fixing portion 40 for fixing the fixing portion 40 to the fixing portion.

第1及び第2ステータ部21,22は、互いに同一構成、同一形状をなし、軸方向に並設されている。なお、第2ステータ部22が軸方向の前記上底部16側(図1及び図2において上側)に配置され、第1ステータ部21がロータコア11の軸方向開放端側(図1及び図2において下側)に配置される。   The first and second stator portions 21 and 22 have the same configuration and the same shape as each other, and are arranged side by side in the axial direction. The second stator portion 22 is disposed on the upper bottom portion 16 side (upper side in FIGS. 1 and 2) in the axial direction, and the first stator portion 21 is disposed on the axially open end side of the rotor core 11 (in FIGS. Lower).

本実施形態では、第1ステータ部21はA相用とされ、それらには同相(A相)の駆動電流が供給される。また、第2ステータ部22はB相用とされ、それらには同相(B相)の駆動電流が供給される。   In the present embodiment, the first stator section 21 is used for the A phase, and the same current (A phase) is supplied to them. The second stator section 22 is used for the B phase, and the same phase (B phase) drive current is supplied to them.

図2及び図3に示すように、第1及び第2ステータ部21,22はそれぞれ、互いに同一形状を有する一対のステータコア(第1ステータコア23及び第2ステータコア24)と、該一対のステータコア23,24の間に配置された巻線25とを備えている。   As shown in FIGS. 2 and 3, the first and second stator portions 21 and 22 each include a pair of stator cores (a first stator core 23 and a second stator core 24) having the same shape, and a pair of the stator cores 23 and 24. 24, and a winding 25 disposed between them.

各ステータコア23,24は、例えば圧縮成形によって形成された圧粉磁心であって、円筒状をなすコアベース26と、そのコアベース26からに延出された複数(本実施形態では6つ)の爪状磁極とを備えている。なお、第1ステータコア23に形成された爪状磁極を第1爪状磁極27とし、第2ステータコア24に形成された爪状磁極を第2爪状磁極28とする。各爪状磁極27,28は、互いに同一形状をなしている。また、各第1爪状磁極27は周方向において等間隔(60度間隔)に設けられ、各第2爪状磁極28も同様に周方向において等間隔(60度間隔)に設けられている。   Each of the stator cores 23 and 24 is, for example, a dust core formed by compression molding, and has a cylindrical core base 26 and a plurality (six in the present embodiment) extending from the core base 26. And a claw-shaped magnetic pole. The claw-shaped magnetic poles formed on the first stator core 23 are referred to as first claw-shaped magnetic poles 27, and the claw-shaped magnetic poles formed on the second stator core 24 are referred to as second claw-shaped magnetic poles 28. Each claw-shaped magnetic pole 27, 28 has the same shape as each other. The first claw-shaped magnetic poles 27 are provided at equal intervals (60-degree intervals) in the circumferential direction, and the second claw-shaped magnetic poles 28 are also provided at equal intervals (60-degree intervals) in the circumferential direction.

各爪状磁極27,28は、コアベース26から径方向外側に延出されるとともに軸方向を向くように直角に屈曲形成されている。ここで、各爪状磁極27,28において、コアベース26から径方向外側に延出した部分を径方向延出部29といい、軸方向に屈曲された先端部分を磁極部30という。径方向延出部29は、外周側ほど周方向幅が狭くなるように形成されている。磁極部30の外周面(径方向外側面)は、軸線Lを中心とする円弧面に形成されている。   Each claw-shaped magnetic pole 27, 28 extends radially outward from the core base 26 and is bent at a right angle so as to face the axial direction. Here, in each of the claw-shaped magnetic poles 27 and 28, a portion extending radially outward from the core base 26 is referred to as a radially extending portion 29, and a tip portion bent in the axial direction is referred to as a magnetic pole portion 30. The radially extending portion 29 is formed such that the circumferential width decreases toward the outer peripheral side. The outer peripheral surface (radially outer surface) of the magnetic pole portion 30 is formed in an arc surface centered on the axis L.

また、各ステータコア23,24は、径方向内側面に径方向外側に窪んだ凹部23a,24aが形成される。
上記構成の第1及び第2ステータコア23,24は、それらの第1及び第2爪状磁極27,28(磁極部30)が軸方向において互いに反対方向を向くように組み付けられる。また、この組付状態において、第1爪状磁極27の磁極部30と、第2爪状磁極28の磁極部30とが周方向等間隔に交互に配置される。
Each of the stator cores 23 and 24 has a recess 23a and 24a that is recessed radially outward on a radially inner side surface.
The first and second stator cores 23 and 24 having the above-described configuration are assembled such that the first and second claw-shaped magnetic poles 27 and 28 (magnetic pole portions 30) face in opposite directions in the axial direction. In this assembled state, the magnetic pole portions 30 of the first claw-shaped magnetic poles 27 and the magnetic pole portions 30 of the second claw-shaped magnetic poles 28 are alternately arranged at equal intervals in the circumferential direction.

また、この組付状態において、第1及び第2ステータコア23,24の軸方向の間には巻線25が介在されている。なお、巻線25と第1及び第2ステータコア23,24との間には、図示しない絶縁部材が介装されている。巻線25は、ステータ20の周方向に沿った円環状をなしている。また、巻線25は、軸方向においては第1爪状磁極27の径方向延出部29と第2爪状磁極28の径方向延出部29との間に配置されるとともに、径方向においては各ステータコア23,24のコアベース26と各爪状磁極27,28の磁極部30との間に配置されている。   In this assembled state, the winding 25 is interposed between the first and second stator cores 23 and 24 in the axial direction. An insulating member (not shown) is interposed between the winding 25 and the first and second stator cores 23 and 24. The winding 25 has an annular shape along the circumferential direction of the stator 20. The winding 25 is disposed between the radially extending portion 29 of the first claw-shaped magnetic pole 27 and the radially extending portion 29 of the second claw-shaped magnetic pole 28 in the axial direction. Is disposed between the core base 26 of each stator core 23, 24 and the magnetic pole portion 30 of each claw-shaped magnetic pole 27, 28.

上記のように構成された各ステータ部21,22は、所謂ランデル型構造をなす。つまり、第1及び第2ステータ部21,22は、第1及び第2ステータコア23,24間に配置された巻線25によって、第1及び第2爪状磁極27,28をその時々で互いに異なる磁極に励磁する12極のランデル型構造をなす。   Each of the stator portions 21 and 22 configured as described above has a so-called Lundell type structure. That is, the first and second stator portions 21 and 22 cause the first and second claw-shaped magnetic poles 27 and 28 to be different from each other at each time by the windings 25 arranged between the first and second stator cores 23 and 24. It has a 12-pole Rundel-type structure that excites the magnetic poles.

図2に示すように、第1及び第2ステータ部21,22は、第2ステータコア24同士が軸方向に隣接するように積層される。
なお、A相用の第1ステータ部21に対するB相用の第2ステータ部22の配置角度は、軸方向上側(ステータ部21側)から見て時計回り方向に予め定めた所定角度だけずれている。つまり、第1ステータ部21の磁極(各爪状磁極27,28)に対し、第2ステータ部22の磁極(各爪状磁極27,28)が、時計回り方向に所定角度だけずれるように構成されている。
As shown in FIG. 2, the first and second stator portions 21 and 22 are stacked such that the second stator cores 24 are adjacent to each other in the axial direction.
The arrangement angle of the B-phase second stator section 22 with respect to the A-phase first stator section 21 is shifted by a predetermined angle in a clockwise direction when viewed from the axial upper side (the stator section 21 side). I have. In other words, the magnetic poles (claw-shaped magnetic poles 27, 28) of the second stator portion 22 are shifted clockwise by a predetermined angle with respect to the magnetic poles (claw-shaped magnetic poles 27, 28) of the first stator portion 21. Have been.

また、第1及び第2ステータ部21,22と径方向に対向するロータ10側の磁石12,13においても、周方向に互いにずれるように構成されている。詳しくは、軸方向上側(磁石13側)から見て、B相用の磁石13のN極(S極)が、A相用の磁石12のN極(S極)に対し、反時計回り方向に予め定めた所定角度だけずれるように配置されている。   Further, the magnets 12 and 13 on the rotor 10 side radially facing the first and second stator portions 21 and 22 are also configured to be shifted from each other in the circumferential direction. More specifically, when viewed from the upper side in the axial direction (the magnet 13 side), the N-pole (S-pole) of the B-phase magnet 13 is counterclockwise with respect to the N-pole (S-pole) of the A-phase magnet 12. Are arranged so as to be shifted by a predetermined angle.

図1、図2及び図4に示すように、各ステータ部21,22は、軸方向に積層した状態で固定部40によって挟持されてハウジングHに固定される。
固定部40は、第1固定部41と第2固定部42とを有する。第1及び第2固定部41,42は、それぞれ各ステータ部21,22と軸方向において当接する当接部43と、複数のコアバック部44と、複数の取付部45とを有する。
As shown in FIGS. 1, 2, and 4, each of the stator portions 21 and 22 is sandwiched by the fixing portion 40 and fixed to the housing H in a state of being stacked in the axial direction.
The fixing part 40 has a first fixing part 41 and a second fixing part 42. The first and second fixing portions 41 and 42 include a contact portion 43 that comes into contact with each of the stator portions 21 and 22 in the axial direction, a plurality of core back portions 44, and a plurality of mounting portions 45.

第1及び第2固定部41,42の当接部43は、それぞれ円環板状をなすように形成される。第1固定部41の当接部43は第1ステータ部21の第1ステータコア23のコアベース26と軸方向において当接し、第2固定部42の当接部43は第2ステータ部22の第1ステータコア23のコアベース26と軸方向において当接する。   The contact portions 43 of the first and second fixing portions 41 and 42 are formed so as to form annular plates, respectively. The contact portion 43 of the first fixed portion 41 contacts the core base 26 of the first stator core 23 of the first stator portion 21 in the axial direction, and the contact portion 43 of the second fixed portion 42 is the second contact portion of the second stator portion 22. It comes into contact with the core base 26 of one stator core 23 in the axial direction.

各コアバック部44は、第1固定部41,42のそれぞれに径方向内側から軸方向に延出するように形成される。各コアバック部44は、軸直交方向に切った断面が円弧状をなすように形成され、各コアバック部44が各ステータコア23,24に設けられる凹部23a,24aに嵌入されるようになっている。   Each core back portion 44 is formed on each of the first fixing portions 41 and 42 so as to extend in the axial direction from the radial inside. Each of the core back portions 44 is formed such that a cross section cut in a direction perpendicular to the axis forms an arc shape, and each of the core back portions 44 is fitted into the concave portions 23 a and 24 a provided in each of the stator cores 23 and 24. I have.

取付部45は、各コアバック部44の先端側において径方向内側に延出するよう形成される。取付部45には、挿通孔45aが形成され、ハウジングHの被取付部H1に対して例えばボルト等によって取付可能となっている。   The mounting portion 45 is formed to extend radially inward at the distal end side of each core back portion 44. An insertion hole 45a is formed in the attachment portion 45, and can be attached to the attachment portion H1 of the housing H by, for example, a bolt or the like.

また、取付部45は、第1ステータ部21と第2ステータ部22の軸方向における境界位置、即ち、各相(A相、B相)の境界位置に配置される。
上記のように構成された固定部40は、第1及び第2固定部41,42の当接部43によって第1及び第2ステータ部21,22を軸方向に積層した状態で挟持し、取付部45がハウジングHに対して取り付けられることで第1及び第2ステータ部21,22がハウジングHに対して固定される。
Further, the mounting portion 45 is disposed at a boundary position in the axial direction between the first stator portion 21 and the second stator portion 22, that is, at a boundary position of each phase (A phase, B phase).
The fixing portion 40 configured as described above is sandwiched by the contact portions 43 of the first and second fixing portions 41 and 42 in a state where the first and second stator portions 21 and 22 are laminated in the axial direction, and attached. The first and second stator portions 21 and 22 are fixed to the housing H by attaching the portion 45 to the housing H.

次に、本実施形態の作用について説明する。
A相用の第1ステータ部21の各巻線25にはA相駆動電流が供給され、B相用の第2ステータ部22の各巻線25にはB相駆動電流が供給される。A相駆動電流及びB相駆動電流は交流電流であり、互いの位相差が例えば90度に設定される。そして、各ステータ部21,22に対応するA相及びB相駆動電流が供給されると、磁石12,13を回転させるトルクが発生し、ロータ10が回転駆動される。
Next, the operation of the present embodiment will be described.
An A-phase drive current is supplied to each winding 25 of the first A-phase stator portion 21, and a B-phase drive current is supplied to each winding 25 of the second B-phase stator portion 22. The A-phase drive current and the B-phase drive current are AC currents, and their phase difference is set to, for example, 90 degrees. Then, when the A-phase and B-phase driving currents corresponding to the respective stator sections 21 and 22 are supplied, torque for rotating the magnets 12 and 13 is generated, and the rotor 10 is driven to rotate.

次に、本実施形態の特徴的な効果を記載する。
(1)第1及び第2ステータコア23,24の爪状磁極27,28とは径方向反対側に、第1及び第2ステータコア23,24とは別体であって磁性部材からなるコアバック部44が設けられるため、コアバック部44を同一部品にそれぞれ設けた場合と比較して各部品(ステータコア23,24やコアバック部44)の構造を簡素化することができる。
Next, the characteristic effects of the present embodiment will be described.
(1) A core back portion made of a magnetic member that is separate from the first and second stator cores 23 and 24 and is located on the opposite side of the first and second stator cores 23 and 24 in the radial direction from the claw-shaped magnetic poles 27 and 28. Since the 44 is provided, the structure of each component (the stator cores 23 and 24 and the core back portion 44) can be simplified as compared with the case where the core back portion 44 is provided on the same component.

(2)ステータコア23,24の凹部23a,24aにコアバック部44が設けられるため、コアバック部44によってステータコア23,24同士の周方向位置決めを行うことができる。   (2) Since the core back portions 44 are provided in the recesses 23a and 24a of the stator cores 23 and 24, the stator cores 23 and 24 can be positioned in the circumferential direction by the core back portions 44.

(3)第1ステータコア23と、第2ステータコア24と、巻線25とを有するステータ部21,22が軸方向に複数積層され、複数のステータ部21,22を積層した状態で軸方向両側から挟持する挟持部を構成する固定部40を有するため、固定部40によって複数のステータ部21,22を積層した状態で挟持固定することができる。   (3) A plurality of stator portions 21 and 22 having the first stator core 23, the second stator core 24, and the windings 25 are stacked in the axial direction, and the plurality of stator portions 21 and 22 are stacked from both sides in the axial direction. Since the fixing portion 40 that forms the holding portion for holding is provided, the fixing portion 40 can hold and fix the plurality of stator portions 21 and 22 in a stacked state.

(4)固定部40は、複数のステータ部21,22を積層した状態で軸方向一方側に位置する第1固定部41の当接部43と、複数のステータ部21,22を積層した状態で軸方向他方側に位置する第2固定部42の当接部43と、各当接部43の間を接続する接続部としてのコアバック部44及び取付部45とを備える。即ち、固定部40の一部としてコアバック部44を設けることで挟持固定を行いつつコアバック部44の効果を付与することができる。また固定部40とコアバック部44を別体とした場合と比較して部品点数の増加を抑えることができる。   (4) The fixing portion 40 is a state in which the abutting portion 43 of the first fixing portion 41 located on one side in the axial direction in a state where the plurality of stator portions 21 and 22 are stacked, and the plurality of stator portions 21 and 22 are stacked. And a contact part 43 of the second fixing part 42 located on the other side in the axial direction, and a core back part 44 and a mounting part 45 as connecting parts for connecting the contact parts 43 to each other. That is, by providing the core back portion 44 as a part of the fixing portion 40, the effect of the core back portion 44 can be imparted while holding and fixing. In addition, an increase in the number of parts can be suppressed as compared with the case where the fixing portion 40 and the core back portion 44 are formed separately.

(5)取付部45が第1ステータ部21と第2ステータ部22との境界位置に配置されるので、第1ステータ部21と第2ステータ部22との相互間における周方向位置の微調整が可能である。   (5) Since the mounting portion 45 is disposed at the boundary between the first stator portion 21 and the second stator portion 22, fine adjustment of the circumferential position between the first stator portion 21 and the second stator portion 22 is performed. Is possible.

なお、上記実施形態は、以下のように変更してもよい。
・上記実施形態では、第1ステータ部21と第2ステータ部22とを軸方向に積層してステータ20を構成したが、その積層数は適宜変更してもよい。
The above embodiment may be modified as follows.
In the above-described embodiment, the stator 20 is formed by laminating the first stator portion 21 and the second stator portion 22 in the axial direction. However, the number of laminations may be changed as appropriate.

また、第1ステータ部21及び第2ステータ部22のいずれか一方のみでステータ20を構成してもよい。
・上記実施形態では、固定部40と、コアバック部44を一体形成したが、別体であってもよい。
Further, the stator 20 may be constituted by only one of the first stator portion 21 and the second stator portion 22.
-In the above-mentioned embodiment, although fixed part 40 and core back part 44 were formed in one, it may be separate.

・上記実施形態では、ステータコア23,24に凹部23a,24aを形成し、その凹部23a,24aにコアバック部44が嵌入される構成としたが、ステータコア23,24と径方向においてコアバック部44が当接していれば、凹部23a,24aを省略した構成を採用してもよい。   In the above-described embodiment, the recesses 23a and 24a are formed in the stator cores 23 and 24, and the core back portion 44 is fitted into the recesses 23a and 24a. , The concave portions 23a and 24a may be omitted.

・上記実施形態並びに各変形例は適宜組み合わせてもよい。   -The said embodiment and each modification may be combined suitably.

M…モータ、20…ステータ、21…第1ステータ部、22…第2ステータ部、23…第1ステータコア(第1コア部)、23a…凹部、24…第2ステータコア(第2コア部)、24a…凹部、25…コイル(巻線)、26…コアベース、27,28…爪状磁極、40…固定部(挟持部)、43…当接部(第1挟持部及び第2挟持部)、44…コアバック部(接続部)、45…取付部(接続部)。   M: motor, 20: stator, 21: first stator portion, 22: second stator portion, 23: first stator core (first core portion), 23a: concave portion, 24: second stator core (second core portion), 24a: concave portion, 25: coil (winding), 26: core base, 27, 28: claw-shaped magnetic pole, 40: fixed portion (holding portion), 43: contact portion (first holding portion and second holding portion) , 44: core back portion (connection portion), 45: mounting portion (connection portion).

Claims (5)

円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第1コア部と、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第2コア部と、前記第1コア部及び前記第2コア部によって軸方向に挟持されるコイルと、を備えたステータであって、
前記第1及び第2コア部の爪状磁極とは径方向反対側に、前記第1及び第2コア部とは別体であって磁性部材からなるコアバック部が設けられ
前記第1コア部及び前記第2コア部は、径方向の前記コアバック部が位置する側において、前記爪状磁極側に窪んだ凹部が設けられ、
前記凹部に前記コアバック部が位置することを特徴とするステータ。
A first core portion having a plurality of claw-shaped magnetic poles extending in the circumferential direction from the disk-shaped core base, and a plurality of claw-shaped magnetic poles extending in the circumferential direction from the disk-shaped core base in the circumferential direction. A stator comprising: a second core portion; and a coil axially sandwiched between the first core portion and the second core portion,
A core back portion made of a magnetic member and provided separately from the first and second core portions is provided on a radially opposite side of the claw-shaped magnetic poles of the first and second core portions ,
The first core portion and the second core portion are provided with concave portions that are recessed on the claw-shaped magnetic pole side on a side where the core back portion is located in a radial direction,
The stator, wherein the core back portion is located in the concave portion .
請求項1に記載のステータにおいて、
前記第1コア部と、前記第2コア部と、前記コイルとを有するステータ部が軸方向に複数積層され、
複数の前記ステータ部を積層した状態で軸方向両側から挟持する挟持部を有することを特徴とするステータ。
The stator according to claim 1 ,
A plurality of stator portions each including the first core portion, the second core portion, and the coil are stacked in an axial direction,
A stator having a holding portion for holding the plurality of stator portions in a stacked state from both sides in the axial direction.
請求項に記載のステータにおいて、
前記挟持部は、複数の前記ステータ部を積層した状態で軸方向一方側に位置する第1挟持部と、複数の前記ステータ部を積層した状態で軸方向他方側に位置する第2挟持部と、前記第1挟持部及び前記第2挟持部の間を接続する接続部とを備え、
前記接続部の一部として前記コアバック部が設けられることを特徴とするステータ。
The stator according to claim 2 ,
The holding portion is a first holding portion that is located on one side in the axial direction when a plurality of the stator portions are stacked, and a second holding portion that is located on the other side in the axial direction when a plurality of the stator portions are stacked. A connection portion that connects between the first holding portion and the second holding portion,
The stator, wherein the core back portion is provided as a part of the connection portion.
請求項1〜のいずれか一項に記載のステータを備えることを特徴とするモータ。 A motor comprising the stator according to any one of claims 1 to 3 . 円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第1コア部と、円板状のコアベースから軸方向に延出する爪状磁極を周方向に複数有する第2コア部と、前記第1コア部及び前記第2コア部によって軸方向に挟持されるコイルと、を備えたステータの製造方法であって、
前記第1コア部及び前記第2コア部は、圧縮成形によって成形された圧粉磁心であり、磁性部材でなる別体のコアバック部が前記爪状磁極とは径方向反対側において当接配置されるとともに、
前記第1コア部及び前記第2コア部は、径方向の前記コアバック部が位置する側において、前記爪状磁極側に窪んだ凹部が設けられ、前記凹部に前記コアバック部が位置することを特徴とするステータの製造方法。
A first core portion having a plurality of claw-shaped magnetic poles extending in the circumferential direction from the disk-shaped core base, and a plurality of claw-shaped magnetic poles extending in the circumferential direction from the disk-shaped core base in the circumferential direction. A method for manufacturing a stator, comprising: a second core portion; and a coil axially sandwiched between the first core portion and the second core portion,
The first core portion and the second core portion are powder magnetic cores formed by compression molding, and a separate core back portion made of a magnetic member abuts on a side radially opposite to the claw-shaped magnetic pole. As well as
The first core portion and the second core portion are provided with a concave portion that is recessed on the claw-shaped magnetic pole side on a side where the core back portion is located in a radial direction, and the core back portion is located in the concave portion. A method for manufacturing a stator, comprising:
JP2015236660A 2015-12-03 2015-12-03 Stator, motor, and stator manufacturing method Active JP6662008B2 (en)

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JP2015236660A JP6662008B2 (en) 2015-12-03 2015-12-03 Stator, motor, and stator manufacturing method
US15/562,928 US20180269729A1 (en) 2015-12-03 2016-11-29 Motor and method for manufacturing stator
CN201680008480.3A CN107251369A (en) 2015-12-03 2016-11-29 The manufacture method of motor and stator
DE112016005533.1T DE112016005533T5 (en) 2015-12-03 2016-11-29 Engine and method of manufacturing a stator
PCT/JP2016/085256 WO2017094689A1 (en) 2015-12-03 2016-11-29 Method for manufacturing motor and stator

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