JP2009014537A - Resolver - Google Patents

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Publication number
JP2009014537A
JP2009014537A JP2007177286A JP2007177286A JP2009014537A JP 2009014537 A JP2009014537 A JP 2009014537A JP 2007177286 A JP2007177286 A JP 2007177286A JP 2007177286 A JP2007177286 A JP 2007177286A JP 2009014537 A JP2009014537 A JP 2009014537A
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resolver
stator core
back yoke
stator
rotor
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JP4520489B2 (en
Inventor
Shinsuke Henmi
晋介 逸見
Satoru Akutsu
悟 阿久津
Hirokazu Sakuta
寛和 作田
Yosuke Sugino
陽介 杉野
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a resolver capable of improving angle detection accuracy of the resolver by suppressing transmission of stress by a fixing means to a teeth part. <P>SOLUTION: In the resolver 4 including a resolver stator 8 having a stator core 9 in which a plurality of electromagnetic steel plates are laminated and a resolver rotor 6 rotatably provided at the center of the stator core 9 and having an outer circumferential curved line by which reluctance in a space to the stator core 9 is varied in accordance with a rotational angle, wherein the stator core 9 includes a ring-shaped back yoke part 16, the plurality of teeth parts 17 formed so as to protrude from the back yoke part 16 to the inside in the radial direction at an interval along the circumferential direction, and an attachment part 18 formed so as to protrude from the back yoke part 16 to the outside in the radial direction, for fixation to a housing 3 of a motor 1 using a screw 7, a root part 18a of the attachment part 18 includes a constriction part 19 formed on at least one of the both end parts along the circumferential direction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、複数の電磁鋼板が積層されたステータコアを有したレゾルバステータと、このステータコアの中心に回転可能に設けられ、回転角度に応じてステータコアとの間でのリラクタンスが変化する外周曲線を有したレゾルバロータとを備えたレゾルバに関する。   The present invention has a resolver stator having a stator core in which a plurality of electromagnetic steel sheets are laminated, and an outer peripheral curve that is rotatably provided at the center of the stator core and changes reluctance with the stator core according to the rotation angle. The present invention relates to a resolver provided with a resolved resolver rotor.

従来、複数の電磁鋼板が積層されたステータコアを有したレゾルバステータと、このステータコアの中心に回転可能に設けられ、回転角度に応じてステータコアとの間でのリラクタンスが変化する外周曲線を有したレゾルバロータとを備えたレゾルバが知られている。
前記ステータコアの積層方向に沿った端部の前記電磁鋼板は、リング形状のバックヨーク部と、このバックヨーク部から径方向内側に突出し、周方向に間隔をおいて形成された複数のティース部と、前記バックヨーク部から径方向外側に突出し、ネジが貫通する貫通孔が形成され、前記ネジによりモータのハウジングに固着される一対の取付部とを有し、この取付部の根元部は、周方向の両端面が平行に延びて形成されている（例えば、特許文献１参照）。 2. Description of the Related Art Conventionally, a resolver stator having a stator core in which a plurality of electromagnetic steel sheets are laminated, and a resolver having an outer peripheral curve that is rotatably provided at the center of the stator core and changes reluctance with the stator core according to the rotation angle. A resolver including a rotor is known.
The electromagnetic steel sheet at the end along the stacking direction of the stator core includes a ring-shaped back yoke portion, and a plurality of teeth portions protruding radially inward from the back yoke portion and spaced apart in the circumferential direction. A through hole that protrudes radially outward from the back yoke portion and through which a screw passes, and has a pair of mounting portions that are fixed to the motor housing by the screw. Both end surfaces in the direction extend in parallel (for example, see Patent Document 1).

特開２００６−２４２７５８号公報JP 2006-242758 A

しかしながら、このものの場合、ネジを用いて取付部をモータのハウジングに固着すると、ネジによる応力がティース部に伝達され、この応力により、ティース部の磁気特性の変化および寸法の変化が生じて、レゾルバの角度検出精度が低下してしまうという問題点があった。   However, in this case, when the mounting portion is fixed to the motor housing using a screw, the stress due to the screw is transmitted to the tooth portion, and this stress causes changes in the magnetic characteristics and dimensions of the tooth portion, thereby causing the resolver to change. There is a problem that the angle detection accuracy is reduced.

この発明は、上述のような問題点を解決することを課題とするものであって、その目的は、固着手段を用いて被取付体に固着されたときに、その固着手段による応力がティース部に伝達されるのを抑制し、その応力によるティース部の磁気特性の変化および寸法の変化が低減され、レゾルバの角度検出精度を向上させるレゾルバを提供するものである。   An object of the present invention is to solve the above-described problems. The object of the present invention is to fix stress on the teeth portion when the fixing means is used to fix the object to the attachment body. Therefore, it is possible to provide a resolver that improves the angle detection accuracy of a resolver by suppressing changes in magnetic characteristics and dimensions of a tooth portion due to the stress.

この発明に係るレゾルバは、複数の電磁鋼板が積層されたステータコアを有したレゾルバステータと、前記ステータコアの中心に回転可能に設けられ、回転角度に応じて前記ステータコアとの間でのリラクタンスが変化する外周曲線を有したレゾルバロータとを備え、前記ステータコアは、リング形状のバックヨーク部と、このバックヨーク部から径方向内側に突出し、周方向に間隔をおいて形成された複数のティース部と、前記バックヨーク部から径方向外側に突出し、固着手段が貫通する貫通孔が形成され、前記固着手段により被取付体に固着される取付部とを有したレゾルバにおいて、前記取付部の根元部は、周方向の両端部の少なくとも一方に、くびれ部が形成されている。   The resolver according to the present invention is provided so as to be rotatable at the center of the stator core having a stator core in which a plurality of electromagnetic steel plates are laminated, and the reluctance between the stator core changes according to the rotation angle. A resolver rotor having an outer peripheral curve, and the stator core includes a ring-shaped back yoke portion and a plurality of teeth portions protruding radially inward from the back yoke portion and spaced apart in the circumferential direction. In the resolver having a through hole that protrudes radially outward from the back yoke portion and through which the fixing means penetrates, and has a mounting portion that is fixed to the mounted body by the fixing means, the base portion of the mounting portion is A constricted portion is formed on at least one of both end portions in the circumferential direction.

この発明に係るレゾルバによれば、固着手段を用いて被取付体に固着されたときに、その固着手段による応力がティース部に伝達されるのを抑制し、その応力によるティース部の磁気特性の変化および寸法の変化が低減され、レゾルバの角度検出精度を向上させることができる。   According to the resolver of the present invention, when the fixing means is used to fix the attachment body, the stress due to the fixing means is suppressed from being transmitted to the teeth portion, and the magnetic characteristics of the teeth portion due to the stress are suppressed. The change and the change of the dimension are reduced, and the angle detection accuracy of the resolver can be improved.

以下、この発明の各実施の形態を図に基づいて説明するが、各図において、同一または相当の部材、部位については、同一符号を付して説明する。
実施の形態１．
図１（ａ）は実施の形態１に係るレゾルバ４が取り付けられたモータ１の正面図、図１（ｂ）は図１（ａ）のモータ１の側面図、図２（ａ）は図１（ａ）のモータ１のレゾルバ４を示す正面図、図２（ｂ）は図２（ａ）のレゾルバ４の側面図、図３（ａ）は図２（ａ）のレゾルバステータ８の平面図、図３（ｂ）は図３（ａ）のレゾルバステータ８の側面図、図４は図３（ａ）のステータコア９を示す平面図である。
モータ１は、有底円筒形状のケース２と、このケース２の内部に固定された図示しない円筒形状の固定子と、この固定子の内側に回転可能に設けられた図示しない回転子と、ケース２の開口部側に固定され、開口部を覆う被取付体であるハウジング３と、回転子およびハウジング３に設けられたレゾルバ４とを備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.
Embodiment 1 FIG.
1A is a front view of the motor 1 to which the resolver 4 according to Embodiment 1 is attached, FIG. 1B is a side view of the motor 1 in FIG. 1A, and FIG. 2A is FIG. 2A is a front view showing the resolver 4 of the motor 1 in FIG. 2A, FIG. 2B is a side view of the resolver 4 in FIG. 2A, and FIG. 3A is a plan view of the resolver stator 8 in FIG. FIG. 3B is a side view of the resolver stator 8 in FIG. 3A, and FIG. 4 is a plan view showing the stator core 9 in FIG.
The motor 1 includes a bottomed cylindrical case 2, a cylindrical stator (not shown) fixed inside the case 2, a rotor (not shown) rotatably provided inside the stator, and a case 2 is provided with a housing 3 that is fixed to the opening portion side and covers the opening portion, and a resolver 4 provided on the rotor and the housing 3.

レゾルバ４は、回転子のシャフト５に固定され、複数の珪素鋼板が積層されて構成されたレゾルバロータ６と、このレゾルバロータ６の外周に設けられ、固着手段であるネジ７を用いてハウジング３に固着されたレゾルバステータ８とを備えている。
なお、固着手段は、ネジ７に限らず、貫通孔１８ｂに貫通して取付部１８をハウジング３に固着できるものであればよい。 The resolver 4 is fixed to the shaft 5 of the rotor and is provided with a resolver rotor 6 formed by laminating a plurality of silicon steel plates, and a screw 7 that is provided on the outer periphery of the resolver rotor 6 and is a fixing means. And a resolver stator 8 fixed to the base plate.
The fixing means is not limited to the screw 7, but may be any means that can penetrate the through hole 18 b and fix the mounting portion 18 to the housing 3.

レゾルバステータ８は、複数の珪素鋼板が積層されて構成されたステータコア９と、このステータコア９のティース部１７に、樹脂からなるインシュレータ１０を介して、導線が巻回されて構成された巻線１１とを有している。
巻線１１は、１相の励磁巻線と、２相の出力巻線とから構成されている。 The resolver stator 8 includes a stator core 9 formed by laminating a plurality of silicon steel plates, and a winding 11 formed by winding a conductive wire around a tooth portion 17 of the stator core 9 via an insulator 10 made of resin. And have.
The winding 11 is composed of a one-phase excitation winding and a two-phase output winding.

レゾルバロータ６の外周の形状は、シャフト５とともにレゾルバロータ６を回転させたときに、ステータコア９のティース部１７とレゾルバロータ６との間でのリラクタンスが所定の変化をするような特殊形状になっている。   The shape of the outer periphery of the resolver rotor 6 is a special shape such that when the resolver rotor 6 is rotated together with the shaft 5, the reluctance between the teeth portion 17 of the stator core 9 and the resolver rotor 6 changes in a predetermined manner. ing.

レゾルバ４のインシュレータ１０には、巻線１１と電気的に接続された端子１２を有する信号接続用のコネクタ１３が設けられている。
インシュレータ１０の固定子側には、下カバー１４が嵌着され、インシュレータ１０の反固定子側には、上カバー１５が嵌着されており、下カバー１４および上カバー１５により、ステータコア９のティース部１７、インシュレータ１０および巻線１１が覆われている。 The insulator 10 of the resolver 4 is provided with a signal connection connector 13 having a terminal 12 electrically connected to the winding 11.
A lower cover 14 is fitted on the stator side of the insulator 10, and an upper cover 15 is fitted on the anti-stator side of the insulator 10, and the teeth of the stator core 9 are formed by the lower cover 14 and the upper cover 15. The portion 17, the insulator 10 and the winding 11 are covered.

レゾルバ４のステータコア９は、リング形状のバックヨーク部１６と、このバックヨーク部１６から径方向内側に突出し、全周に渡って、間隔をおいて形成された８個のティース部１７と、バックヨーク部１６から径方向外側に突出し、ネジ７が貫通する貫通孔１８ｂが形成された、対向した一対の耳形状の取付部１８とを有している。
取付部１８の根元部１８ａは、周方向に沿った両端部に、周方向に凹んだくびれ部１９が形成されている。
このくびれ部１９により、取付部１８の根元部１８ａは、塑性変形が可能になっている。 The stator core 9 of the resolver 4 includes a ring-shaped back yoke portion 16, eight teeth portions 17 projecting radially inward from the back yoke portion 16 and spaced over the entire circumference, It has a pair of opposing ear-shaped attachment portions 18 that protrude radially outward from the yoke portion 16 and have through holes 18b through which the screws 7 pass.
The base portion 18a of the mounting portion 18 has a constricted portion 19 that is recessed in the circumferential direction at both end portions along the circumferential direction.
By this constricted portion 19, the base portion 18a of the mounting portion 18 can be plastically deformed.

巻線１１の励磁巻線には、例えば、１０ｋＨｚ、５Ｖｐｐの正弦波信号が印加され、モータ１の回転により、レゾルバロータ６が回転すると、ステータコア９のティース部１７とレゾルバロータ６との間でのリラクタンスが変化し、２相の出力巻線における、出力電圧の振幅と、励磁巻線に入力された正弦波信号に対する出力電圧の位相とが変化する。
２相の出力巻線の振幅変化は、互いの位相が９０度ずれるように配置されており、この信号を図示しない検出回路によって信号処理することで、回転子の回転角度が検出される。 For example, a 10 kHz, 5 Vpp sine wave signal is applied to the excitation winding of the winding 11, and when the resolver rotor 6 is rotated by the rotation of the motor 1, between the teeth portion 17 of the stator core 9 and the resolver rotor 6. Reluctance changes, and the amplitude of the output voltage in the two-phase output winding and the phase of the output voltage with respect to the sine wave signal input to the excitation winding change.
The amplitude changes of the two-phase output windings are arranged so that their phases are shifted by 90 degrees, and the rotation angle of the rotor is detected by processing this signal by a detection circuit (not shown).

次に、ネジ７を用いてハウジング３にレゾルバステータ８を固着するときの、ネジ７による応力のステータコア９への影響について説明する。
ネジ７を用いてレゾルバステータ８をハウジング３に固着すると、ネジ７の座面およびハウジング３からステータコア９の取付部１８に最も強い応力が加えられる。
取付部１８に加えられたネジ７による応力の主力は、くびれ部１９の塑性変形により吸収され、バックヨーク部１６への伝達が抑制される。その結果、ネジ７による応力のティース部１７への伝達が抑制される。
ティース部１７への応力の伝達が抑制されるので、ティース部１７の磁気特性の変化および寸法の変化が低減されて、レゾルバ４の角度検出の精度を向上させることができる。 Next, the influence of the stress caused by the screw 7 on the stator core 9 when the resolver stator 8 is fixed to the housing 3 using the screw 7 will be described.
When the resolver stator 8 is fixed to the housing 3 using the screw 7, the strongest stress is applied to the seating surface of the screw 7 and the mounting portion 18 of the stator core 9 from the housing 3.
The main force of the stress due to the screw 7 applied to the mounting portion 18 is absorbed by the plastic deformation of the constricted portion 19, and transmission to the back yoke portion 16 is suppressed. As a result, transmission of stress to the teeth portion 17 by the screw 7 is suppressed.
Since the transmission of stress to the tooth portion 17 is suppressed, changes in the magnetic properties and dimensions of the tooth portion 17 are reduced, and the angle detection accuracy of the resolver 4 can be improved.

以上説明したように、実施の形態１に係るレゾルバ４によると、取付部１８の根元部１８ａには、周方向に沿った両端部にくびれ部１９が形成されているので、モータ１のハウジング３に固着されたときに、ネジ７による応力がティース部１７に伝達されるのを抑制し、その応力によるティース部１７の磁気特性の変化および寸法の変化が低減され、その結果、レゾルバ４の角度検出の精度を向上させることができる。   As described above, according to the resolver 4 according to the first embodiment, the base portion 18a of the mounting portion 18 is formed with the constricted portions 19 at both end portions along the circumferential direction. When it is fixed to the tooth portion, the stress due to the screw 7 is suppressed from being transmitted to the tooth portion 17, and the change in magnetic properties and the size of the tooth portion 17 due to the stress are reduced. As a result, the angle of the resolver 4 is reduced. The accuracy of detection can be improved.

なお、上記実施の形態１では、取付部１８の根元部１８ａの周方向の両端部にくびれ部１９が形成されたステータコア９について説明したが、勿論このものに限らず、取付部１８の根元部１８ａの周方向の両端部の何れか一方にくびれ部１９が形成されたステータコア９であってもよい。   In the first embodiment, the stator core 9 in which the constricted portions 19 are formed at both ends in the circumferential direction of the root portion 18a of the mounting portion 18 has been described. However, the present invention is not limited to this, and the root portion of the mounting portion 18 is of course not limited thereto. It may be the stator core 9 in which the constricted portion 19 is formed at either one of the both ends in the circumferential direction of 18a.

また、上記実施の形態１では、モータ１の回転子の回転角度の検出に用いられるレゾルバ４について説明したが、勿論このものに限らず、その他の回転角度の検出に用いられるレゾルバ４であってもよい。   In the first embodiment, the resolver 4 used for detecting the rotation angle of the rotor of the motor 1 has been described. Of course, the resolver 4 is not limited to this, and the resolver 4 is used for detecting other rotation angles. Also good.

図１（ａ）は実施の形態１に係るレゾルバが取り付けられたモータの正面図、図１（ｂ）は図１（ａ）のモータの側面図である。FIG. 1A is a front view of a motor to which the resolver according to Embodiment 1 is attached, and FIG. 1B is a side view of the motor of FIG. 図２（ａ）は図１（ａ）のモータのレゾルバを示す正面図、図２（ｂ）は図２（ａ）のレゾルバの側面図である。2A is a front view showing a resolver of the motor of FIG. 1A, and FIG. 2B is a side view of the resolver of FIG. 2A. 図３（ａ）は図２（ａ）のレゾルバステータの内部を示す正面図、図３（ｂ）は図３（ａ）のレゾルバステータの側面図である。3A is a front view showing the inside of the resolver stator of FIG. 2A, and FIG. 3B is a side view of the resolver stator of FIG. 3A. 図４は図３（ａ）のステータコアを示す正面図である。FIG. 4 is a front view showing the stator core of FIG.

符号の説明Explanation of symbols

１ モータ、２ ケース、３ ハウジング、４ レゾルバ、５ シャフト、６ レゾルバロータ、７ ネジ、８ レゾルバステータ、９ ステータコア、１０ インシュレータ、１１ 巻線、１２ 端子、１３ コネクタ、１４ 下カバー、１５ 上カバー、１６ バックヨーク部、１７ ティース部、１８ 取付部、１８ａ 根元部、１８ｂ 貫通孔、１９ くびれ部。   1 motor, 2 case, 3 housing, 4 resolver, 5 shaft, 6 resolver rotor, 7 screw, 8 resolver stator, 9 stator core, 10 insulator, 11 winding, 12 terminals, 13 connector, 14 lower cover, 15 upper cover, 16 Back yoke portion, 17 teeth portion, 18 mounting portion, 18a root portion, 18b through hole, 19 constricted portion.

Claims (2)

複数の電磁鋼板が積層されたステータコアを有したレゾルバステータと、
前記ステータコアの中心に回転可能に設けられ、回転角度に応じて前記ステータコアとの間でのリラクタンスが変化する外周曲線を有したレゾルバロータとを備え、
前記ステータコアは、リング形状のバックヨーク部と、このバックヨーク部から径方向内側に突出し、周方向に間隔をおいて形成された複数のティース部と、前記バックヨーク部から径方向外側に突出し、固着手段が貫通する貫通孔が形成され、前記固着手段により被取付体に固着される取付部とを有したレゾルバにおいて、
前記取付部の根元部は、周方向の両端部の少なくとも一方に、くびれ部が形成されていることを特徴とするレゾルバ。 A resolver stator having a stator core in which a plurality of electromagnetic steel sheets are laminated;
A resolver rotor having an outer peripheral curve that is rotatably provided at the center of the stator core and changes reluctance with the stator core according to a rotation angle;
The stator core includes a ring-shaped back yoke portion, a plurality of teeth portions projecting radially inward from the back yoke portion, and spaced apart in the circumferential direction, and projecting radially outward from the back yoke portion, In the resolver having a through-hole through which the fixing means penetrates and having an attachment portion fixed to the attached body by the fixing means,
The resolver according to claim 1, wherein the base portion of the mounting portion is formed with a constricted portion at at least one of both end portions in the circumferential direction. モータの回転子の回転角度の検出に用いられることを特徴とする請求項１に記載のレゾルバ。   The resolver according to claim 1, wherein the resolver is used for detecting a rotation angle of a rotor of a motor.
JP2007177286A 2007-07-05 2007-07-05 Resolver Expired - Fee Related JP4520489B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946425A1 (en) * 2009-06-03 2010-12-10 Mitsubishi Electric Corp Resolver for detecting rotation angle of motor, has stator windings mounted on teeth of stator core by first and second slit insulators, where protection cover covering windings is provided on first insulator and not on second insulator
JP2012139749A (en) * 2010-12-28 2012-07-26 Hitachi Koki Co Ltd Power tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242758A (en) * 2005-03-03 2006-09-14 Honda Motor Co Ltd Resolver and vehicular steering device
JP2006280117A (en) * 2005-03-29 2006-10-12 Showa Corp Mounting structure of resolver, rotary electric machine, and mounting method of resolver
JP2007143249A (en) * 2005-11-16 2007-06-07 Tamagawa Seiki Co Ltd Resolver stator structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006242758A (en) * 2005-03-03 2006-09-14 Honda Motor Co Ltd Resolver and vehicular steering device
JP2006280117A (en) * 2005-03-29 2006-10-12 Showa Corp Mounting structure of resolver, rotary electric machine, and mounting method of resolver
JP2007143249A (en) * 2005-11-16 2007-06-07 Tamagawa Seiki Co Ltd Resolver stator structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2946425A1 (en) * 2009-06-03 2010-12-10 Mitsubishi Electric Corp Resolver for detecting rotation angle of motor, has stator windings mounted on teeth of stator core by first and second slit insulators, where protection cover covering windings is provided on first insulator and not on second insulator
JP2010283962A (en) * 2009-06-03 2010-12-16 Mitsubishi Electric Corp Resolver
JP4731614B2 (en) * 2009-06-03 2011-07-27 三菱電機株式会社 Resolver
JP2012139749A (en) * 2010-12-28 2012-07-26 Hitachi Koki Co Ltd Power tool

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