JP5002859B2 - Variable reluctance resolver rotor and brushless motor - Google Patents

Variable reluctance resolver rotor and brushless motor Download PDF

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JP5002859B2
JP5002859B2 JP2008215562A JP2008215562A JP5002859B2 JP 5002859 B2 JP5002859 B2 JP 5002859B2 JP 2008215562 A JP2008215562 A JP 2008215562A JP 2008215562 A JP2008215562 A JP 2008215562A JP 5002859 B2 JP5002859 B2 JP 5002859B2
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press
resolver rotor
salient pole
variable reluctance
resolver
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JP2010048775A (en
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祐司 山下
工 鈴木
克年 豊竹
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Asmo Co Ltd
Tamagawa Seiki Co Ltd
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Tamagawa Seiki Co Ltd
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Description

本発明は、回転軸に対して好適に固定可能なバリアブルリラクタンス型レゾルバロータ、及びそのレゾルバを備えてなるブラシレスモータに関するものである。   The present invention relates to a variable reluctance resolver rotor that can be suitably fixed to a rotating shaft, and a brushless motor including the resolver.

従来、バリアブルリラクタンス型（ＶＲ型）レゾルバロータとしては、例えば特許文献１に記載されたものが知られている。レゾルバロータは、その外側検出面とレゾルバステータとの間のギャップパーミアンスが該レゾルバロータ（回転軸）の回転角度に対して正弦波状に変化するように非円形状（文献１では、径方向外側に突出する突極部を２つ有する形状）をなしている。このようなレゾルバロータは、回転軸に圧入にて固定されるのが一般的である。
特開２００２−１７４５３５号公報 Conventionally, as a variable reluctance type (VR type) resolver rotor, for example, one described in Patent Document 1 is known. The resolver rotor has a non-circular shape so that the gap permeance between the outer detection surface and the resolver stator changes sinusoidally with respect to the rotation angle of the resolver rotor (rotating shaft) (in Reference 1, the outer side in the radial direction). A shape having two protruding salient pole portions). Such a resolver rotor is generally fixed to a rotating shaft by press fitting.
JP 2002-174535 A

ところで、レゾルバロータは回転軸との位置決めを行う必要もあるため、特許文献１では、レゾルバロータ中央部の軸固定孔内周縁に突起を１個形成し、回転軸のレゾルバロータの固定部分にも位置決め凹部を１個形成して、その突起を位置決め凹部内に嵌合させることで回転軸に対するレゾルバロータの周方向の位置決めが行われている。   By the way, since it is necessary to position the resolver rotor with the rotating shaft, in Patent Document 1, one protrusion is formed on the inner periphery of the shaft fixing hole at the center of the resolver rotor, and the resolver rotor is fixed to the rotating shaft. Positioning in the circumferential direction of the resolver rotor with respect to the rotation shaft is performed by forming one positioning recess and fitting the protrusion into the positioning recess.

しかしながら、レゾルバロータの軸固定孔がその位置決め用の突起を設けることで非円形状となることから、該軸固定孔にてレゾルバロータを回転軸に圧入固定すると、その軸固定孔の周縁部において回転軸からの圧接力の反力が周方向に均一に作用しないために、レゾルバロータの外側検出面に周方向に不均一な変形が生じてしまう。レゾルバロータの外側検出面は、回転角度の検出に係る高精度な形状に形成されているため、このような周方向の不均一な変形が生じると、レゾルバステータで生成される回転角度信号においてその波形歪みの原因となるレゾルバステータのスロット数と一致した高調波成分が助長され検出性能に著しい影響を及ぼすことがある。   However, since the shaft fixing hole of the resolver rotor becomes non-circular by providing the positioning projection, when the resolver rotor is press-fitted and fixed to the rotating shaft through the shaft fixing hole, the peripheral edge of the shaft fixing hole is Since the reaction force of the pressure contact force from the rotating shaft does not act uniformly in the circumferential direction, non-uniform deformation occurs in the circumferential direction on the outer detection surface of the resolver rotor. Since the outer detection surface of the resolver rotor is formed in a highly accurate shape related to the detection of the rotation angle, if such uneven deformation in the circumferential direction occurs, the rotation angle signal generated by the resolver stator Harmonic components that coincide with the number of slots in the resolver stator, which cause waveform distortion, are promoted and may significantly affect detection performance.

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、回転軸への圧入に伴う外側検出面の周方向の不均一な変形を抑制でき、レゾルバの検出性能の向上に寄与することができるバリアブルリラクタンス型レゾルバロータ及びブラシレスモータを提供することにある。   The present invention has been made to solve the above-mentioned problems, and its purpose is to suppress uneven deformation in the circumferential direction of the outer detection surface due to press-fitting into the rotating shaft, and to improve the detection performance of the resolver. It is an object of the present invention to provide a variable reluctance resolver rotor and a brushless motor that can contribute to the above.

上記課題を解決するために、請求項１に記載の発明は、径方向外側に複数の突極部を有する外側検出面を備えるとともに、回転軸に圧入固定される軸固定孔を中央部に備えてなるバリアブルリラクタンス型レゾルバロータであって、前記軸固定孔には、少なくとも１つを除いた所定の前記突極部の周方向中央部に該孔に開口する位置決め凹部が設けられるとともに、該孔の内周縁部に前記回転軸に圧接する複数の圧入凸部が設けられ、前記複数の圧入凸部はそれぞれ、前記突極部間の谷部と一致する角度位置から周方向両側にそれぞれ前記突極部の１／４の範囲内の角度位置に配置されていることをその要旨とする。 In order to solve the above-mentioned problems, the invention according to claim 1 includes an outer detection surface having a plurality of salient pole portions on the radially outer side, and a shaft fixing hole that is press-fitted and fixed to the rotating shaft at the center portion. A variable reluctance type resolver rotor, wherein the shaft fixing hole is provided with a positioning recess opening in the circumferential central portion of the predetermined salient pole portion excluding at least one, and the hole inner peripheral edge portion of the plurality of press-fit protrusions for pressing is provided on the rotary shaft, each of the plurality of press-fit protrusions, wherein each of the angular position that matches the valleys between the salient pole portions in the circumferential sides butt of The gist is that it is arranged at an angular position within a quarter of the pole portion .

この発明では、レゾルバロータの軸固定孔には、少なくとも１つを除いた所定の突極部の周方向中央部に該孔に開口する位置決め凹部が設けられ、また該孔の内周縁部に回転軸に圧接する複数の圧入凸部が設けられる。そして、複数の圧入凸部はそれぞれ、隣接する突極部間の谷部と一致する角度位置から周方向両側にそれぞれ突極部の１／４の範囲内の角度位置に配置される。ここで、このようなレゾルバロータでは各突極部に対して位置決め凹部を有するものと有さないものとが混在するため、レゾルバロータの回転軸への圧入の際、その位置決め凹部の有無で各突極部の外側検出面に現れる歪み寸法量に差が生じることが懸念される。それを踏まえ、突極部の周方向中央部に設ける位置決め凹部に対し、軸固定孔の内周縁部の圧入凸部を突極部間の谷部と一致する角度位置から周方向両側にそれぞれ突極部の１／４の範囲内の角度位置に設ける、即ち各圧入凸部をその位置決め凹部から極力離間させつつ、各突極部間の谷部と一致する角度位置から周方向両側にそれぞれ突極部の１／４の範囲内の角度位置に分散して設けることで、回転軸からの圧接力の反力が各圧入凸部を通じて周方向に略均等に作用することが可能となる。また、圧入凸部の圧入による各突極部の外側検出面の歪みが、レゾルバステータとのエアギャップが最も大きく一定量の歪みに対し検出精度が最も影響を与えられ難い谷部に最も大きく現れ易いものとなる。これにより、各突極部の外側検出面の変形が略均一となり、レゾルバの検出性能の向上に寄与できる。 In the present invention, the shaft fixing hole of the resolver rotor is provided with a positioning recess opening in the circumferential center portion of a predetermined salient pole portion excluding at least one, and is rotated at the inner peripheral edge portion of the hole. A plurality of press-fitting protrusions are provided in pressure contact with the shaft. Each of the plurality of press-fitting convex portions is arranged at an angular position within a range of ¼ of the salient pole portion on each side in the circumferential direction from an angular position that coincides with a valley between adjacent salient pole portions. Here, in such a resolver rotor, there are a mixture of those having a positioning recess for each salient pole portion and those having no positioning recess. There is a concern that a difference may occur in the amount of strain dimension appearing on the outer detection surface of the salient pole part. Based on this, the press-fitting convex portion on the inner peripheral edge of the shaft fixing hole protrudes from the angular position that coincides with the trough between the salient pole portions to the both sides in the circumferential direction with respect to the positioning concave portion provided in the central portion in the circumferential direction of the salient pole portion. providing an angle position location within 1/4 of the range pole portions, i.e. each respective press-fit protrusions while as much as possible away from the positioning recess, both sides in the circumferential direction from the angle position corresponding valley portion between each salient pole portion By dispersively providing angular positions within a quarter of the salient pole portion, the reaction force of the press contact force from the rotating shaft can be applied substantially uniformly in the circumferential direction through each press-fit convex portion. In addition, the distortion of the outer detection surface of each salient pole due to the press-fitting of the press-fitting protrusions is the largest in the valley where the air gap with the resolver stator is the largest and the detection accuracy is hardly affected by a certain amount of distortion. It will be easy. Thereby, the deformation | transformation of the outer side detection surface of each salient pole part becomes substantially uniform, and it can contribute to the improvement of the detection performance of a resolver.

請求項２に記載の発明は、請求項１に記載のバリアブルリラクタンス型レゾルバロータにおいて、前記位置決め凹部の周方向両側に設けられる前記圧入凸部は、前記突極部間の谷部と一致する角度位置から前記位置決め凹部側に前記突極部の１／４の範囲内でそれぞれ偏倚させてなることをその要旨とする。   According to a second aspect of the present invention, in the variable reluctance type resolver rotor according to the first aspect, the press-fit convex portions provided on both sides in the circumferential direction of the positioning concave portion coincide with a valley portion between the salient pole portions. The gist is that each of the salient poles is deviated from the position within the range of 1/4 of the salient pole part.

この発明では、位置決め凹部の周方向両側に設けられる圧入凸部は、突極部間の谷部と一致する角度位置からその位置決め凹部側に突極部の１／４の範囲内でそれぞれ偏倚して配置される。ここで、例えば各圧入凸部を周方向に等角度間隔に配置してもその配置が位置決め凹部から極力離間する突極部間の谷部としていることから、各突極部に対して位置決め凹部の有無が混在しても各突極部の外側検出面の変形が均等化するものの、若干ではあるが位置決め凹部を有する突極部の外側検出面の変形が異なる。この場合、位置決め凹部の周方向両側に設けられる圧入凸部を突極部間の谷部と一致する角度位置に設定すると若干遠くなるため該凹部が開くように変形するため、これを防止すべく、位置決め凹部の周方向両側の圧入凸部は、該凹部側に上記範囲内で偏倚して配置される。これにより、各突極部の外側検出面の変形がより均一化され、レゾルバの検出性能のより一層の向上に寄与できる。   In this invention, the press-fitting convex portions provided on both sides in the circumferential direction of the positioning concave portion are displaced from the angular position coincident with the valley portion between the salient pole portions to the positioning concave portion within a range of 1/4 of the salient pole portion. Arranged. Here, for example, even if the press-fitting convex portions are arranged at equal angular intervals in the circumferential direction, the arrangement is a valley between salient pole portions that are as far away as possible from the positioning concave portion. Although the deformation of the outer detection surface of each salient pole portion is equalized even if both are present, the deformation of the outer detection surface of the salient pole portion having the positioning recess is slightly different. In this case, if the press-fit convex portions provided on both sides in the circumferential direction of the positioning concave portion are set at an angular position that coincides with the valley portion between the salient pole portions, the concave portion is deformed so that the concave portion is opened. The press-fitting convex portions on both sides in the circumferential direction of the positioning concave portion are biased and disposed within the above range on the concave portion side. Thereby, the deformation | transformation of the outer side detection surface of each salient pole part is made more uniform, and it can contribute to the further improvement of the detection performance of a resolver.

請求項３に記載の発明は、請求項１又は２に記載のバリアブルリラクタンス型レゾルバロータにおいて、前記レゾルバロータは、複数枚のコアシートを積層し、前記突極部の周方向中央部に設けた連結部にて軸方向に連結して一体化されるものであることをその要旨とする。   According to a third aspect of the present invention, in the variable reluctance resolver rotor according to the first or second aspect, the resolver rotor is formed by laminating a plurality of core sheets and is provided at a circumferential central portion of the salient pole portion. The gist of the invention is that they are connected and integrated in the axial direction at the connecting portion.

この発明では、レゾルバロータは、複数枚のコアシートを積層し、突極部の周方向中央部に設けた連結部にて軸方向に連結して一体化されてなる。つまり、レゾルバロータはコアシートを用いた積層型よりなり、その製造が容易である。   In the present invention, the resolver rotor is formed by laminating a plurality of core sheets and connecting and integrating them in the axial direction at a connecting portion provided at the center in the circumferential direction of the salient pole portion. That is, the resolver rotor is a laminated type using a core sheet, and its manufacture is easy.

請求項４に記載の発明は、請求項１〜３のいずれか１項に記載のバリアブルリラクタンス型レゾルバロータにおいて、前記位置決め凹部は、周方向に１つ設けられてなることをその要旨とする。   The gist of the invention described in claim 4 is that, in the variable reluctance type resolver rotor described in any one of claims 1 to 3, the positioning recess is provided in the circumferential direction.

この発明では、位置決め凹部が周方向に１つのレゾルバロータは、回転軸への圧入固定の際に各突極部の外側検出面の変形に差が生じ易い形状であることから、このレゾルバロータに適用する意義は大きい。また、上記請求項３に適用すれば、かしめ部等よりなる連結部におけるコアシート間の連結力が位置決め凹部側に逃げて低下することが抑制され、コアシートが相互に強固に連結できる。   In the present invention, the resolver rotor having one positioning recess in the circumferential direction has a shape that is likely to cause a difference in deformation of the outer detection surface of each salient pole portion when being press-fitted and fixed to the rotating shaft. Significance of application is great. Moreover, if it applies to the said Claim 3, it is suppressed that the connection force between the core sheets in the connection part which consists of a crimping part etc. escapes and falls to the positioning recessed part side, and a core sheet can connect firmly mutually.

請求項５に記載の発明は、請求項１〜４のいずれか１項に記載のバリアブルリラクタンス型レゾルバロータにおいて、前記位置決め凹部の周方向両側に設けられる前記圧入凸部は、その他の前記圧入凸部よりも前記回転軸に対する圧入代が大とされていることをその要旨とする。   According to a fifth aspect of the present invention, in the variable reluctance resolver rotor according to any one of the first to fourth aspects, the press-fit protrusions provided on both sides in the circumferential direction of the positioning recess are the other press-fit protrusions. The gist is that the press-fitting allowance for the rotating shaft is larger than the portion.

この発明では、位置決め凹部の周方向両側に設けられる圧入凸部は、その他の圧入凸部よりも回転軸に対する圧入代が大とされる。つまり、位置決め凹部の周方向両側に設けられる圧入凸部の回転軸への圧接力がその位置決め凹部側に逃げることを考慮し、各圧入凸部の圧接力を略同等、即ち各突極部の外側検出面の変形を略同等とすることが可能となる。   In this invention, the press-fitting protrusions provided on both sides in the circumferential direction of the positioning recess have a larger press-fitting allowance for the rotation shaft than the other press-fitting protrusions. That is, considering that the pressing force to the rotation shaft of the press-fitting convex portion provided on both sides in the circumferential direction of the positioning concave portion escapes to the positioning concave portion side, the pressing force of each press-fitting convex portion is substantially equal, that is, each salient pole portion The deformation of the outer detection surface can be made substantially equal.

請求項６に記載の発明は、請求項１〜５のいずれか１項に記載のレゾルバロータをモータの回転軸に圧入固定し、その径方向外側にレゾルバステータを配置してなるバリアブルリラクタンス型レゾルバが搭載されたブラシレスモータである。   A sixth aspect of the present invention is a variable reluctance resolver in which the resolver rotor according to any one of the first to fifth aspects is press-fitted and fixed to a rotating shaft of a motor, and a resolver stator is disposed radially outside thereof. Is a brushless motor equipped with

この発明では、上記請求項に記載のレゾルバロータが用いられ、該レゾルバロータをモータの回転軸に圧入固定しても各突極部の外側検出面の変形が略均一となることでレゾルバの検出性能が良好となるため、回転角度検出に優れたレゾルバ搭載のブラシレスモータを提供できる。   In the present invention, the resolver rotor described in the above claims is used, and even when the resolver rotor is press-fitted and fixed to the rotation shaft of the motor, the deformation of the outer detection surface of each salient pole portion becomes substantially uniform, thereby detecting the resolver. Since the performance is good, it is possible to provide a resolver-mounted brushless motor excellent in rotation angle detection.

本発明によれば、回転軸への圧入に伴う外側検出面の周方向の不均一な変形を抑制でき、レゾルバの検出性能の向上に寄与することができるバリアブルリラクタンス型レゾルバロータ及びブラシレスモータを提供することができる。   According to the present invention, there are provided a variable reluctance resolver rotor and a brushless motor that can suppress non-uniform deformation in the circumferential direction of the outer detection surface due to press-fitting into a rotating shaft, and can contribute to improvement in the detection performance of the resolver. can do.

以下、本発明を具体化した一実施形態を図面に従って説明する。
図１は、本実施形態におけるバリアブルリラクタンス型（ＶＲ型）レゾルバ搭載のブラシレスモータ１を示す断面図である。このブラシレスモータ１は、例えば運転者のステアリング操作をアシストすることを主たる目的とした車両用電動パワーステアリング装置に組み付けられる。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a brushless motor 1 equipped with a variable reluctance type (VR type) resolver according to this embodiment. The brushless motor 1 is assembled in a vehicular electric power steering apparatus whose main purpose is to assist a driver's steering operation, for example.

図１に示すように、ブラシレスモータ１は、ステータコア３の複数のティース３ａにそれぞれモータ巻線２が巻回されてなる環状のステータ４と、該ステータ４の内側に配置されて回転軸５とともに一体回転するロータ６と、該ロータ６の回転角度を検出するＶＲ型のレゾルバ７とを備えている。   As shown in FIG. 1, the brushless motor 1 includes an annular stator 4 in which a motor winding 2 is wound around a plurality of teeth 3 a of a stator core 3, and a rotating shaft 5 that is disposed inside the stator 4. A rotor 6 that rotates integrally and a VR resolver 7 that detects a rotation angle of the rotor 6 are provided.

ブラシレスモータ１のモータケース１０は、有底筒状に形成されたヨークハウジング１１と、該ヨークハウジング１１の開口部１１ａを閉塞するエンドプレート１２とからなり、ステータ４はそのヨークハウジング１１の内周面に固定されている。ステータ４は、モータ巻線２に三相（Ｕ，Ｖ，Ｗ相）の駆動電源が供給されることにより、回転磁界を発生する。   A motor case 10 of the brushless motor 1 includes a yoke housing 11 formed in a bottomed cylindrical shape and an end plate 12 that closes an opening 11 a of the yoke housing 11, and the stator 4 has an inner periphery of the yoke housing 11. It is fixed to the surface. The stator 4 generates a rotating magnetic field when three-phase (U, V, W phase) driving power is supplied to the motor winding 2.

ロータ６は、その回転軸５がヨークハウジング１１の底部１１ｂ及びエンドプレート１２に設けられた軸受１３，１４により回転可能に支持され、ステータ４の内側に配置されている。ロータ６は、マグネット飛散防止用の円筒カバー６ａの内部に複数個のマグネット（図示略）を有している。ロータ６は、ステータ４にて生じる回転磁界の影響を受け回転する。   The rotor 6 has a rotating shaft 5 rotatably supported by bearings 13 and 14 provided on the bottom 11 b of the yoke housing 11 and the end plate 12, and is disposed inside the stator 4. The rotor 6 has a plurality of magnets (not shown) inside a cylindrical cover 6a for preventing magnet scattering. The rotor 6 rotates under the influence of a rotating magnetic field generated in the stator 4.

レゾルバ７は、図２に示すように、回転軸５に圧入されて該回転軸５（ロータ６）と一体回転するように固定される環状のレゾルバロータ２１と、該レゾルバロータ２１の径方向外側に配置される環状のレゾルバステータ２２とを備えている。   As shown in FIG. 2, the resolver 7 is an annular resolver rotor 21 that is press-fitted into the rotating shaft 5 and fixed so as to rotate integrally with the rotating shaft 5 (rotor 6), and a radially outer side of the resolver rotor 21. And an annular resolver stator 22.

レゾルバロータ２１は、図３に示すように、同形状の磁性鋼板よりなるコアシート２１ｘを複数枚積層してなり、径方向外側に突出する同形状の複数（７つ）の突極部３１を備えている。これら突極部３１は、周方向に等角度間隔に配設されており、中心角の二等分線に関して線対称となる略円弧状の外側検出面３１ａを有している。   As shown in FIG. 3, the resolver rotor 21 is formed by laminating a plurality of core sheets 21 x made of magnetic steel plates having the same shape, and includes a plurality (seven) salient pole portions 31 of the same shape protruding outward in the radial direction. I have. These salient pole portions 31 are arranged at equal angular intervals in the circumferential direction, and have a substantially arc-shaped outer detection surface 31a that is line-symmetric with respect to the bisector of the central angle.

また、レゾルバロータ２１は、中央部に前記回転軸５に固定するための略円形状の軸固定孔３２を有するとともに、複数の突極部３１のうちいずれか１つの突極部３１の周方向中央部の角度位置でその軸固定孔３２に向けて開口する矩形状の位置決め凹部３３（位置決め部）を有している。位置決め凹部３３は、突極部３１の周方向範囲の１／２よりも小さく設定されている。位置決め凹部３３は、各々のコアシート２１ｘに形成された凹部３３ｘが軸方向に一致され、これにより軸方向に貫通する溝形状をなしている。位置決め凹部３３は、前記ロータ６に対するレゾルバロータ２１の周方向の位置決めのためのものであり、例えば両ロータ６，２１間に跨って冶具等が挿通されてレゾルバロータ２１の各突極部３１と前記ロータ６の永久磁石との周方向の位置決めに用いられる。   The resolver rotor 21 has a substantially circular shaft fixing hole 32 for fixing to the rotation shaft 5 at the center, and the circumferential direction of any one of the plurality of salient pole portions 31. It has a rectangular positioning recess 33 (positioning portion) that opens toward the shaft fixing hole 32 at the angular position of the center portion. The positioning recess 33 is set to be smaller than ½ of the circumferential range of the salient pole portion 31. The positioning recess 33 has a groove shape in which the recesses 33x formed in each core sheet 21x are aligned in the axial direction, thereby penetrating in the axial direction. The positioning recess 33 is for positioning the resolver rotor 21 in the circumferential direction with respect to the rotor 6. For example, a jig or the like is inserted between the rotors 6, 21 and the salient pole portions 31 of the resolver rotor 21. It is used for circumferential positioning of the rotor 6 with the permanent magnet.

また、レゾルバロータ２１は、軸固定孔３２の内周縁部において、各突極部３１間の谷部３１ｂと一致する角度位置にそれぞれ同形状をなす半円状の圧入凸部３４を有している。これら圧入凸部３４は、前記回転軸５へのレゾルバロータ２１の圧入に際し、該回転軸５の外周面（円周面）に圧接することでレゾルバロータ２１が回転軸５に固定される。   In addition, the resolver rotor 21 has semicircular press-fit convex portions 34 having the same shape at angular positions that coincide with the valley portions 31b between the salient pole portions 31 at the inner peripheral edge portion of the shaft fixing hole 32. Yes. When the resolver rotor 21 is press-fitted into the rotary shaft 5, these press-fit convex portions 34 are pressed against the outer peripheral surface (circumferential surface) of the rotary shaft 5, thereby fixing the resolver rotor 21 to the rotary shaft 5.

また、レゾルバロータ２１は、各突極部３１の周方向中央部の角度位置でその外側検出面３１ａから径方向内側の等距離位置にそれぞれ配置された円形のかしめ部３５（連結部）を有している。これらかしめ部３５は、各コアシート２１ｘの一側面から他側面側に押し出されて形成され、隣接する一方のコアシート２１ｘのかしめ部３５の凸部が他方のコアシート２１ｘのかしめ部３５の凹部に嵌合することで、複数のコアシート２１ｘが軸方向に積層されて一体的に固定される。このとき、位置決め凹部３３が設置される突極部３１のかしめ部３５では、軸方向の連結力が位置決め凹部３３側に逃げ、その連結力が他の位置に設置されるかしめ部３５よりも若干弱くなるが、位置決め凹部３３を１箇所のみの設置としている本実施形態では、他の位置のかしめ部３５により十分な連結力が得られ、コアシート２１ｘが相互に十分強固に連結される。そして、複数枚のコアシート２１ｘが一体化されて構成されたレゾルバロータ２１にて回転軸５に対して圧入されている。   In addition, the resolver rotor 21 has circular caulking portions 35 (connecting portions) disposed at equidistant positions on the radially inner side from the outer detection surface 31a at the angular position of the central portion in the circumferential direction of each salient pole portion 31. is doing. These caulking portions 35 are formed by being pushed out from one side surface to the other side surface of each core sheet 21x, and the convex portion of the caulking portion 35 of one adjacent core sheet 21x is the concave portion of the caulking portion 35 of the other core sheet 21x. The plurality of core sheets 21x are laminated in the axial direction and fixed integrally. At this time, in the caulking portion 35 of the salient pole portion 31 where the positioning recess 33 is installed, the axial coupling force escapes to the positioning recess 33 side, and the coupling force is slightly larger than the caulking portion 35 installed in another position. In the present embodiment in which the positioning recess 33 is installed only at one place, a sufficient coupling force is obtained by the caulking portions 35 at other positions, and the core sheets 21x are coupled sufficiently firmly to each other. And it is press-fitted with respect to the rotating shaft 5 by the resolver rotor 21 comprised by integrating the several core sheet | seat 21x.

ここで、このようなレゾルバロータ２１の回転軸５への圧入の際、軸固定孔３２の周方向一部に設けた位置決め凹部３３の影響を受け、各突極部３１の外側検出面３１ａに現れる歪み寸法量に差が生じることが懸念される。それを踏まえ、本実施形態のレゾルバロータ２１は、１つの突極部３１の周方向中央部の角度位置に設けられる１つの位置決め凹部３３に対し、各圧入凸部３４をその位置決め凹部３３から極力離間させつつ、７つある突極部３１間の谷部３１ｂと一致する角度位置、即ち本実施形態では等角度間隔にそれぞれ配置させている。これにより、レゾルバロータ２１の圧入による回転軸５からの圧接力の反力が各圧入凸部３４を通じて周方向に略均等に作用するようになる。こうして、レゾルバロータ２１の全ての突極部３１の外側検出面３１ａの変形が略同等とされて、レゾルバ７の検出性能の向上が図られている。   Here, when the resolver rotor 21 is press-fitted into the rotating shaft 5, it is affected by the positioning recess 33 provided in a part of the circumferential direction of the shaft fixing hole 32, and the outer detection surface 31 a of each salient pole portion 31 is affected. There is a concern that a difference may appear in the amount of strain dimension that appears. Based on this, the resolver rotor 21 of the present embodiment is configured such that each press-fit convex portion 34 is positioned as much as possible from the positioning concave portion 33 with respect to one positioning concave portion 33 provided at the angular position of the central portion in the circumferential direction of one salient pole portion 31. While being spaced apart, they are arranged at angular positions that coincide with the valley portions 31b between the seven salient pole portions 31, that is, at equal angular intervals in this embodiment. As a result, the reaction force of the pressure contact force from the rotating shaft 5 due to the press-fitting of the resolver rotor 21 acts substantially uniformly in the circumferential direction through each press-fitting convex portion 34. In this way, the deformation of the outer detection surfaces 31a of all the salient pole portions 31 of the resolver rotor 21 is made substantially equal, and the detection performance of the resolver 7 is improved.

図１及び図２に示すように、レゾルバステータ２２は、同形状の磁性鋼板よりなるコアシート２２ｘを複数枚積層してなり、複数（１０本）のティース２３ａを有するレゾルバステータコア２３と、樹脂製のインシュレータ２４を介してティース２３ａに巻回されたレゾルバ巻線２５とを備えている。尚、レゾルバ巻線２５は、励磁電圧が印加される一相の励磁巻線と、該励磁巻線の励磁に基づいてレゾルバロータ２１の回転に応じた位相の異なる出力信号（回転角度信号）を出力する二相の出力巻線とからなり、それぞれ所定位置のティース２３ａに巻回されている。レゾルバステータ２２は、エンドプレート１２に対して固定プレート１５と取付ねじ１６にて固定される。   As shown in FIGS. 1 and 2, the resolver stator 22 is formed by laminating a plurality of core sheets 22x made of magnetic steel plates having the same shape, and a resolver stator core 23 having a plurality (ten) teeth 23a, and a resin And a resolver winding 25 wound around a tooth 23a via an insulator 24. The resolver winding 25 has a single-phase excitation winding to which an excitation voltage is applied, and an output signal (rotation angle signal) having a different phase according to the rotation of the resolver rotor 21 based on the excitation of the excitation winding. It consists of two-phase output windings that output, each wound around a tooth 23a at a predetermined position. The resolver stator 22 is fixed to the end plate 12 with a fixing plate 15 and a mounting screw 16.

また、レゾルバステータ２２には、レゾルバ用コネクタ２６が一体に設けられている。レゾルバ巻線２５は、レゾルバ用コネクタ２６が外部から延びる信号配線２７の接続コネクタ２７ａと接続されることで、外部に設けられる制御装置（図示略）と電気的に接続される。そして、制御装置は、レゾルバ巻線２５のうちの励磁巻線を励磁させつつ出力巻線から得られる出力信号に基づいてレゾルバロータ２１、即ちモータ１のロータ６の回転位置を検出し、ステータ４（モータ巻線２）に供給する三相駆動電源を生成するようになっている。   The resolver stator 22 is integrally provided with a resolver connector 26. The resolver winding 25 is electrically connected to a control device (not shown) provided outside by connecting the resolver connector 26 to the connection connector 27a of the signal wiring 27 extending from the outside. The control device detects the rotational position of the resolver rotor 21, that is, the rotor 6 of the motor 1, based on the output signal obtained from the output winding while exciting the excitation winding of the resolver winding 25, and the stator 4. A three-phase drive power supply to be supplied to the (motor winding 2) is generated.

次に、本実施形態の特徴的な作用効果を記載する。
（１）本実施形態のレゾルバロータ２１の軸固定孔３２には、１つの突極部３１の周方向中央部に該孔３２に開口する位置決め凹部３３が設けられ、また該孔３２の内周縁部に回転軸５に圧接する複数の圧入凸部３４が設けられている。そして、この圧入凸部３４は、隣接する突極部３１間の谷部３１ｂと一致する角度位置に等角度間隔に配置されている。つまり、圧入に影響を与える位置決め凹部３３から各圧入凸部３４を極力離間させつつ、各突極部３１間の谷部３１ｂに相当する角度位置に分散して設けることで、回転軸５への圧入固定の際に、回転軸５からの圧接力の反力が各圧入凸部３４を通じて周方向に略均等に作用することとなる。また、圧入凸部３４の圧入による各突極部３１の外側検出面３１ａの歪みが、レゾルバステータ２２とのエアギャップが最も大きく一定量の歪みに対し検出精度が最も影響を与えられ難い谷部３１ｂに最も大きく現れ易いものとなる。そのため、各突極部３１の外側検出面３１ａの変形が略均一となることから、モータ１のロータ６の回転角度検出に係るレゾルバ７で生成される出力信号（回転角度信号）において、その波形歪みの原因となるレゾルバステータ２２のスロット数（１０個）と一致した高調波成分（１０次高調波成分）を抑制することができ、レゾルバ７の検出性能の向上を図ることができる。これにより、回転角度検出に優れたレゾルバ７搭載のブラシレスモータ１を構成でき、ひいては低振動・低騒音のブラシレスモータ１を構成することができる。 Next, characteristic effects of the present embodiment will be described.
(1) The shaft fixing hole 32 of the resolver rotor 21 of the present embodiment is provided with a positioning recess 33 that opens to the hole 32 at the center in the circumferential direction of one salient pole portion 31, and the inner peripheral edge of the hole 32. A plurality of press-fitting convex portions 34 that are in pressure contact with the rotary shaft 5 are provided on the portion. The press-fit convex portions 34 are arranged at equiangular intervals at angular positions that coincide with the valley portions 31 b between the adjacent salient pole portions 31. That is, by disposing the press-fitting convex portions 34 from the positioning concave portions 33 that affect the press-fitting as much as possible and dispersing them at angular positions corresponding to the valley portions 31 b between the salient pole portions 31, At the time of press-fitting and fixing, the reaction force of the press-contact force from the rotary shaft 5 acts substantially uniformly in the circumferential direction through the respective press-fitting convex portions 34. Further, the distortion of the outer detection surface 31a of each salient pole portion 31 due to the press-fitting of the press-fitting convex portion 34 has the largest air gap with the resolver stator 22, and the valley where the detection accuracy is hardly affected by a certain amount of strain. It becomes the most likely to appear at 31b. Therefore, since the deformation of the outer detection surface 31a of each salient pole portion 31 becomes substantially uniform, the waveform of the output signal (rotation angle signal) generated by the resolver 7 relating to the rotation angle detection of the rotor 6 of the motor 1 is The harmonic component (10th harmonic component) that matches the number of slots (10) of the resolver stator 22 that causes distortion can be suppressed, and the detection performance of the resolver 7 can be improved. Thereby, the brushless motor 1 equipped with the resolver 7 excellent in rotation angle detection can be configured, and as a result, the brushless motor 1 with low vibration and low noise can be configured.

（２）位置決め凹部３３が周方向に１つの本実施形態のレゾルバロータ２１は、回転軸５への圧入固定の際に各突極部３１の外側検出面３１ａの変形に差が生じ易い形状であることから、本実施形態のレゾルバロータ２１に適用する意義は大きい。また、本実施形態のレゾルバロータ２１は、複数枚のコアシート２１ｘを積層し、突極部３１の周方向中央部に設けたかしめ部３５にて軸方向に連結して一体化されてなる。つまり、レゾルバロータ２１はコアシート２１ｘを用いた積層型よりなり、その製造が容易であるのは勿論のこと、かしめ部３５におけるコアシート２１ｘ間の連結力が位置決め凹部３３側に逃げて低下することを抑制することができ、コアシート２１ｘを相互に強固に連結することができる。   (2) The resolver rotor 21 of the present embodiment having one positioning recess 33 in the circumferential direction has a shape in which a difference is easily caused in the deformation of the outer detection surface 31 a of each salient pole portion 31 during press-fitting and fixing to the rotary shaft 5. Therefore, it is significant to apply to the resolver rotor 21 of the present embodiment. In addition, the resolver rotor 21 of the present embodiment is formed by laminating a plurality of core sheets 21x and connecting and integrating them in the axial direction with a caulking portion 35 provided at a circumferential central portion of the salient pole portion 31. That is, the resolver rotor 21 is a laminated type using the core sheet 21x, and the manufacturing force thereof is easy, and the connecting force between the core sheets 21x in the caulking portion 35 escapes toward the positioning recess 33 and decreases. This can be suppressed, and the core sheets 21x can be firmly connected to each other.

尚、本発明の実施形態は、以下のように変更してもよい。
・上記実施形態において、圧入凸部３４を突極部３１間の谷部３１ｂと一致する角度位置に等角度間隔に配置したが、圧入凸部３４の配置はこれに限らず、例えば突極部３１間の谷部３１ｂと一致する角度位置から周方向に若干偏倚させて調整してもよい。この場合、突極部３１間の谷部３１ｂと一致する角度位置から周方向両側にそれぞれ突極部３１の１／４の範囲内（図３のＡ範囲）とするのが望ましい。 In addition, you may change embodiment of this invention as follows.
In the above embodiment, the press-fit convex portions 34 are arranged at equal angular intervals at the angular positions that coincide with the valley portions 31b between the salient pole portions 31, but the arrangement of the press-fit convex portions 34 is not limited to this, for example, salient pole portions It may be adjusted by slightly deviating in the circumferential direction from the angular position that coincides with the valley portion 31b between 31. In this case, it is desirable that the angle position coincides with the valley portion 31b between the salient pole portions 31 to be within a range of 1/4 of the salient pole portion 31 on both sides in the circumferential direction (A range in FIG. 3).

また、図４に示す形態では、位置決め凹部３３の周方向両側に設けられる圧入凸部３４ａを、突極部３１間の谷部３１ｂと一致する角度位置からその位置決め凹部３３側に突極部の１／４の範囲Ａ内でそれぞれ同量だけ偏倚させている。尚、各圧入凸部３４ａは、この場合、範囲Ａの略中央にそれぞれ偏倚させている。   Further, in the embodiment shown in FIG. 4, the press-fitting convex portions 34 a provided on both sides in the circumferential direction of the positioning concave portion 33 are arranged on the positioning concave portion 33 side from the angular position coincident with the valley portion 31 b between the salient pole portions 31. Within the range A of ¼, the same amount is biased. In this case, each press-fit convex portion 34a is biased to the approximate center of the range A.

ここで、上記実施形態のように圧入凸部３４を突極部３１間の谷部３１ｂと一致させ等角度間隔に配置しても十分な効果が得られるが、図５に示すように、極めて僅かではあるが位置決め凹部３３を有する突極部３１（図５中、マル１）の外側検出面３１ａの径方向外側への変形量が小さく、その周方向両側の突極部３１（図５中、マル２及びマル７）もその影響を受け、その外側検出面３１ａの径方向外側への変形量が大きくなり、その他の位置決め凹部３３を有さない突極部３１（図５中、マル３〜マル６）の外側検出面３１ａの変形に差は生じない。この場合、位置決め凹部３３の周方向両側に設けられる圧入凸部３４を突極部３１間の谷部３１ｂと一致する角度位置に設定すると若干遠くなるため該凹部３３が開くように変形するためであり、これを防止すべく、図４に示す形態では、位置決め凹部３３の周方向両側の圧入凸部３４ａを該凹部３３側に上記範囲Ａ内で偏倚させることで、各突極部３１の外側検出面３１ａの変形をより均一化でき（図５にて実線で示す）、レゾルバ７の検出性能をより一層の向上することができる。   Here, a sufficient effect can be obtained even if the press-fitting convex portions 34 are aligned with the valley portions 31b between the salient pole portions 31 and arranged at equal angular intervals as in the above embodiment, but as shown in FIG. A small amount of deformation of the salient pole portion 31 (mal 1 in FIG. 5) of the outer detection surface 31a in the radial direction outside is small, and the salient pole portions 31 (see FIG. , Circle 2 and circle 7) are also affected by this, and the amount of deformation of the outer detection surface 31a toward the radially outer side increases, and the other salient pole portion 31 having no positioning recess 33 (see circle 3 in FIG. 5). No difference occurs in the deformation of the outer detection surface 31a of. In this case, if the press-fit convex portions 34 provided on both sides in the circumferential direction of the positioning concave portion 33 are set at an angular position that coincides with the valley portion 31b between the salient pole portions 31, the concave portion 33 is deformed so as to open. In order to prevent this, in the embodiment shown in FIG. 4, the press-fit convex portions 34 a on both sides in the circumferential direction of the positioning concave portion 33 are biased toward the concave portion 33 within the range A, so that the outside of each salient pole portion 31. The deformation of the detection surface 31a can be made more uniform (shown by the solid line in FIG. 5), and the detection performance of the resolver 7 can be further improved.

・上記実施形態では、７つの突極部３１を有するレゾルバロータ２１であったが、突極部３１の数を適宜変更してもよい。
例えば、図６に示すように、突極部３１を６つとしてレゾルバロータ２１を構成してもよい。また、この図６のレゾルバロータ２１では、６つの突極部３１で構成することから、位置決め凹部３３を２つとし、１８０°対向する突極部３１に配置することもできる。 In the above embodiment, the resolver rotor 21 has seven salient pole portions 31, but the number of salient pole portions 31 may be changed as appropriate.
For example, as shown in FIG. 6, the resolver rotor 21 may be configured with six salient pole portions 31. Further, since the resolver rotor 21 shown in FIG. 6 is composed of six salient pole portions 31, the positioning concave portion 33 can be two and disposed on the salient pole portion 31 facing 180 °.

また、図７に示すように、突極部３１を５つとしてレゾルバロータ２１を構成してもよい。また、この図７のレゾルバロータ２１では、５つの突極部３１で構成することから、位置決め凹部３３を３つとし、回転軸５を挟んだ３つの突極部３１にそれぞれ配置することもできる。   In addition, as shown in FIG. 7, the resolver rotor 21 may be configured with five salient pole portions 31. Further, since the resolver rotor 21 shown in FIG. 7 is composed of the five salient pole portions 31, the positioning recess 33 can be set to three and can be respectively arranged on the three salient pole portions 31 sandwiching the rotating shaft 5. .

・上記実施形態では、圧入凸部３４の形状を同形状とし回転軸５に対する圧入代を同等としたが、これに限らず適宜変更してもよく、例えば図８に示すように、位置決め凹部３３の周方向両側に設けられる圧入凸部３４ｂの先端部（径方向内側端部）までの半径ｒ２を、その他の圧入凸部３４の先端部（径方向内側端部）までの半径ｒ１よりも小とし、位置決め凹部３３の両側の圧入凸部３４ｂの回転軸５に対する圧入代を大としてもよい。これにより、先端部まで半径ｒ２とした圧入凸部３４ｂの回転軸５への圧接力が位置決め凹部３３側に逃げて半径ｒ１の圧入凸部３４の圧接力と略同等となり、これら略同等の圧接力による各突極部３１の外側検出面３１ａの歪みも略同等のものとなる。これにより、レゾルバ７の検出性能の向上を図ることができる。   In the above embodiment, the shape of the press-fitting convex portion 34 is the same shape and the press-fitting allowance for the rotary shaft 5 is equal. However, the present invention is not limited to this, and may be appropriately changed. For example, as shown in FIG. The radius r2 to the tip (radially inner end) of the press-fit convex portion 34b provided on both sides in the circumferential direction is smaller than the radius r1 to the tip (radially inner end) of the other press-fit convex 34. The press-fitting allowance for the rotary shaft 5 of the press-fitting convex portions 34b on both sides of the positioning concave portion 33 may be increased. As a result, the press-contact force of the press-fit convex portion 34b having the radius r2 up to the tip portion escapes to the positioning concave portion 33 side and becomes substantially equal to the press-fit force of the press-fit convex portion 34 of radius r1, and these substantially equal press-contact forces. The distortion of the outer detection surface 31a of each salient pole portion 31 due to the force is substantially equivalent. Thereby, the detection performance of the resolver 7 can be improved.

・上記実施形態では、突極部３１間の谷部３１ｂに相当する角度位置にそれぞれ１つの圧入凸部３４を設けたが、２以上の複数個を設けるようにしてもよい。また、圧入凸部３４を半円状以外の形状にて形成してもよい。   In the above-described embodiment, one press-fit convex portion 34 is provided at each angular position corresponding to the valley portion 31b between the salient pole portions 31, but a plurality of two or more may be provided. Moreover, you may form the press-fit convex part 34 in shapes other than semicircle shape.

・上記実施形態では、ブラシレスモータ１に搭載するレゾルバ７に適用したが、その他の装置に搭載するレゾルバに適用してもよい。   In the above embodiment, the present invention is applied to the resolver 7 mounted on the brushless motor 1, but may be applied to a resolver mounted on other devices.

本実施形態におけるブラシレスモータを示す断面図である。It is sectional drawing which shows the brushless motor in this embodiment. ＶＲ型レゾルバを示す平面図である。It is a top view which shows a VR type | mold resolver. レゾルバロータの構成を説明するための平面図である。It is a top view for demonstrating the structure of a resolver rotor. 別例におけるレゾルバロータの構成を説明するための平面図である。It is a top view for demonstrating the structure of the resolver rotor in another example. 図４のレゾルバロータの各突極部の変形量を説明するための説明図である。FIG. 5 is an explanatory diagram for explaining a deformation amount of each salient pole portion of the resolver rotor of FIG. 4. 別例におけるレゾルバロータの構成を説明するための平面図である。It is a top view for demonstrating the structure of the resolver rotor in another example. 別例におけるレゾルバロータの構成を説明するための平面図である。It is a top view for demonstrating the structure of the resolver rotor in another example. 別例におけるレゾルバロータの構成を説明するための平面図である。It is a top view for demonstrating the structure of the resolver rotor in another example.

符号の説明Explanation of symbols

１…ブラシレスモータ、５…回転軸、７…バリアブルリラクタンス型（ＶＲ型）レゾルバ、２１…レゾルバロータ、２２…レゾルバステータ、２１ｘ…コアシート、３１…突極部、３１ａ…外側検出面、３１ｂ…谷部、３２…軸固定孔、３３…位置決め凹部、３４，３４ａ，３４ｂ…圧入凸部、３５…かしめ部（連結部）、Ａ…範囲。   DESCRIPTION OF SYMBOLS 1 ... Brushless motor, 5 ... Rotating shaft, 7 ... Variable reluctance type (VR type) resolver, 21 ... Resolver rotor, 22 ... Resolver stator, 21x ... Core sheet, 31 ... Salient pole part, 31a ... Outer detection surface, 31b ... Valley part, 32 ... shaft fixing hole, 33 ... positioning concave part, 34, 34a, 34b ... press-fitting convex part, 35 ... caulking part (connecting part), A ... range.

Claims (6)

径方向外側に複数の突極部を有する外側検出面を備えるとともに、回転軸に圧入固定される軸固定孔を中央部に備えてなるバリアブルリラクタンス型レゾルバロータであって、
前記軸固定孔には、少なくとも１つを除いた所定の前記突極部の周方向中央部に該孔に開口する位置決め凹部が設けられるとともに、該孔の内周縁部に前記回転軸に圧接する複数の圧入凸部が設けられ、
前記複数の圧入凸部はそれぞれ、前記突極部間の谷部と一致する角度位置から周方向両側にそれぞれ前記突極部の１／４の範囲内の角度位置に配置されていることを特徴とするバリアブルリラクタンス型レゾルバロータ。 A variable reluctance resolver rotor having an outer detection surface having a plurality of salient pole portions on the radially outer side, and a shaft fixing hole that is press-fitted and fixed to a rotating shaft at the center portion,
The shaft fixing hole is provided with a positioning recess that opens to the hole in the circumferential central portion of the predetermined salient pole portion except at least one, and is in pressure contact with the rotary shaft at the inner peripheral edge of the hole. A plurality of press-fitting protrusions are provided,
Each of the plurality of press-fitting convex portions is disposed at an angular position within a range of ¼ of the salient pole portion on each side in the circumferential direction from an angular position that coincides with a valley between the salient pole portions. A variable reluctance type resolver rotor. 請求項１に記載のバリアブルリラクタンス型レゾルバロータにおいて、
前記位置決め凹部の周方向両側に設けられる前記圧入凸部は、前記突極部間の谷部と一致する角度位置から前記位置決め凹部側に前記突極部の１／４の範囲内でそれぞれ偏倚させてなることを特徴とするバリアブルリラクタンス型レゾルバロータ。 The variable reluctance type resolver rotor according to claim 1,
The press-fitting convex portions provided on both sides in the circumferential direction of the positioning concave portion are respectively biased from the angular position coincident with the valley portion between the salient pole portions to the positioning concave portion within a range of 1/4 of the salient pole portion. A variable reluctance resolver rotor characterized by comprising: 請求項１又は２に記載のバリアブルリラクタンス型レゾルバロータにおいて、
前記レゾルバロータは、複数枚のコアシートを積層し、前記突極部の周方向中央部に設けた連結部にて軸方向に連結して一体化されるものであることを特徴とするバリアブルリラクタンス型レゾルバロータ。 In the variable reluctance type resolver rotor according to claim 1 or 2,
The resolver rotor is a variable reluctance characterized in that a plurality of core sheets are laminated and integrated in an axial direction at a connecting portion provided at a circumferential central portion of the salient pole portion. Type resolver rotor. 請求項１〜３のいずれか１項に記載のバリアブルリラクタンス型レゾルバロータにおいて、
前記位置決め凹部は、周方向に１つ設けられてなることを特徴とするバリアブルリラクタンス型レゾルバロータ。 In the variable reluctance type resolver rotor according to any one of claims 1 to 3,
A variable reluctance resolver rotor, wherein one positioning recess is provided in the circumferential direction. 請求項１〜４のいずれか１項に記載のバリアブルリラクタンス型レゾルバロータにおいて、
前記位置決め凹部の周方向両側に設けられる前記圧入凸部は、その他の前記圧入凸部よりも前記回転軸に対する圧入代が大とされていることを特徴とするバリアブルリラクタンス型レゾルバロータ。 The variable reluctance type resolver rotor according to any one of claims 1 to 4,
The variable reluctance resolver rotor characterized in that the press-fitting convex portions provided on both sides in the circumferential direction of the positioning concave portion have a larger press-fitting allowance with respect to the rotating shaft than the other press-fitting convex portions. 請求項１〜５のいずれか１項に記載のレゾルバロータをモータの回転軸に圧入固定し、その径方向外側にレゾルバステータを配置してなるバリアブルリラクタンス型レゾルバが搭載されたことを特徴とするブラシレスモータ。   A variable reluctance type resolver is mounted, wherein the resolver rotor according to any one of claims 1 to 5 is press-fitted and fixed to a rotating shaft of a motor, and a resolver stator is disposed outside in a radial direction thereof. Brushless motor.
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