JP2006014523A - Rotation angle detecting device for electric rotating machine - Google Patents

Rotation angle detecting device for electric rotating machine Download PDF

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JP2006014523A
JP2006014523A JP2004189627A JP2004189627A JP2006014523A JP 2006014523 A JP2006014523 A JP 2006014523A JP 2004189627 A JP2004189627 A JP 2004189627A JP 2004189627 A JP2004189627 A JP 2004189627A JP 2006014523 A JP2006014523 A JP 2006014523A
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rotor
rotation angle
electrical machine
rotating electrical
phase
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Hideaki Otsuka
英明 大塚
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Nissan Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to shorten length in the axis-of-rotation direction of an electric rotating machine. <P>SOLUTION: A coil 13 that is wound centering on the rotating shaft of a rotor 4 is arranged near an end surface of the axis-of-rotation direction of the rotor 4. Then, the rotation angle of the rotor 4 is detected based on an induced voltage that is generated in the coil 13 by leakage flux that occurs from the pawl-like magnetic poles of the rotor 4. This structure enables the coil 13 for detecting the rotation angle of the rotor 4 to be provided inside a dead space of a three-phase AC electric rotating machine 1, which makes it unnecessary to arrange a device in the axis-of-rotation direction of the rotor 4. Thus, the rotating machine 1 can be made thinner and simultaneously, the length in the axis-of-rotation direction of the rotating machine 1 can be shortened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ハイブリッド車両や燃料電池自動車等の車両を駆動する三相交流回転電機に適用して好適な回転電機の回転角検出装置に関する。   The present invention relates to a rotation angle detection device for a rotating electrical machine suitable for application to a three-phase AC rotating electrical machine that drives a vehicle such as a hybrid vehicle or a fuel cell vehicle.

一般に、回転電機の回転数を制御する際には、回転電機の回転角に合わせて回転電機に供給する電流の位相を制御する必要があるために、回転電機の回転角を正確に検出する必要性がある。このような背景から、爪状磁極を有するルンデル型（若しくはランデル型）回転電機には、回転電機の回転子の回転軸と同軸に配設されたセンサ回転子とセンサ固定子から成る回転角センサが配設され、この回転角センサを利用して回転電機の回転角を検出している（例えば、特許文献１を参照）。
特開２００３−６１３２４号公報 In general, when controlling the rotational speed of a rotating electrical machine, it is necessary to control the phase of the current supplied to the rotating electrical machine in accordance with the rotational angle of the rotating electrical machine. Therefore, it is necessary to accurately detect the rotational angle of the rotating electrical machine. There is sex. From such a background, the Rundel type (or Rundel type) rotating electrical machine having the claw-shaped magnetic pole includes a rotation angle sensor comprising a sensor rotor and a sensor stator arranged coaxially with the rotation axis of the rotor of the rotating electrical machine. The rotation angle of the rotating electrical machine is detected using this rotation angle sensor (see, for example, Patent Document 1).
JP 2003-61324 A

しかしながら、従来までの回転角センサは、上述の通り、回転電機の回転子の回転軸と同軸にセンサ回転子を配設する構成となっているために、このような回転角度センサを利用した場合、回転電機の回転軸方向の寸法を小さくすることは困難である。   However, since the conventional rotation angle sensor has a configuration in which the sensor rotor is arranged coaxially with the rotation axis of the rotor of the rotating electrical machine as described above, when such a rotation angle sensor is used, It is difficult to reduce the size of the rotating electrical machine in the direction of the rotation axis.

本発明は、上記課題を解決するためになされたものであり、その目的は、回転電機の回転軸方向の寸法を小さくすることが可能な回転電機の回転角検出装置を提供することにある。   The present invention has been made to solve the above-described problems, and an object thereof is to provide a rotation angle detection device for a rotating electrical machine capable of reducing the size of the rotating electrical machine in the rotation axis direction.

上述の課題を解決するために、本発明に係る回転電機の回転角検出装置は、回転子の回転軸方向端面に近接配置され、回転子の回転軸を軸として巻線されたコイルを備え、回転子の爪状磁極から生じる漏れ磁束によってコイルに誘起される電圧に基づいて回転子の回転角を検出する。   In order to solve the above-mentioned problems, a rotation angle detection device for a rotating electrical machine according to the present invention includes a coil that is disposed close to the end surface in the rotation axis direction of the rotor and wound around the rotation axis of the rotor, The rotation angle of the rotor is detected based on the voltage induced in the coil by the leakage magnetic flux generated from the claw-shaped magnetic pole of the rotor.

本発明に係る回転電機の回転角検出装置は、回転電機の回転軸方向に装置を配設する必要が無いので、回転電機の回転軸方向の寸法を小さくすることができる。   Since the rotation angle detection device for a rotating electrical machine according to the present invention does not need to be provided in the direction of the rotating shaft of the rotating electrical machine, the size of the rotating electrical machine in the direction of the rotating shaft can be reduced.

本発明に係る回転角検出装置は、図１に示すような、ハイブリッド車両や燃料電池自動車等の車両を駆動する三相交流回転電機に適用することができる。以下、図面を参照して、本発明に係る回転角検出装置を適用した本発明の実施形態となる三相交流回転電機の構成について詳しく説明する。   The rotation angle detection device according to the present invention can be applied to a three-phase AC rotating electric machine that drives a vehicle such as a hybrid vehicle or a fuel cell vehicle as shown in FIG. Hereinafter, the configuration of a three-phase AC rotating electric machine that is an embodiment of the present invention to which a rotation angle detection device according to the present invention is applied will be described in detail with reference to the drawings.

〔三相交流回転電機の構成〕
本発明の実施形態となる三相交流回転電機１は、図１に示すように、界磁巻線２が巻かれた回転子コア３により構成される回転子４と、三相固定子巻線５が巻かれた固定子コア６により構成される固定子７と、回転子４と固定子７を保持するブラケット８と、軸受９を介して回転子４をブラケット８に対し回転自在に保持する回転軸１０と、回転軸１０の一方の端部に配設されたスリップリング１１と、スリップリング１１を介して界磁巻線２に界磁電流を供給する界磁端子１２とを主な構成要素として備える。また、回転子コア３は、爪状磁極が交互に組み合わされた状態になるように、爪状磁極を有する二つのコア３ａ，３ｂを向かい合わせで接合することにより構成されている。 [Configuration of three-phase AC rotating electric machine]
As shown in FIG. 1, a three-phase AC rotating electrical machine 1 according to an embodiment of the present invention includes a rotor 4 including a rotor core 3 around which a field winding 2 is wound, and a three-phase stator winding. A stator 7 constituted by a stator core 6 wound with 5, a rotor 4, a bracket 8 that holds the stator 7, and a rotor 9 that rotatably supports the bracket 8 via a bearing 9. The main configuration includes a rotating shaft 10, a slip ring 11 disposed at one end of the rotating shaft 10, and a field terminal 12 that supplies a field current to the field winding 2 via the slip ring 11. Prepare as an element. The rotor core 3 is configured by joining two cores 3a and 3b having claw-shaped magnetic poles facing each other so that the claw-shaped magnetic poles are alternately combined.

このような構成を有する三相交流回転電機１には、回転子４の回転軸方向端面近傍に回転子４の回転軸を軸として巻線されたコイル１３（巻数Ｎは任意の値）が配置され、コイル１３を利用して以下のようにして回転子４の回転角を検出する。以下、回転子４の回転角を検出する際の三相交流回転電機１の動作について説明する。   In the three-phase AC rotating electric machine 1 having such a configuration, a coil 13 (the number of turns N is an arbitrary value) wound around the rotating shaft of the rotor 4 is arranged in the vicinity of the end surface in the rotating shaft direction of the rotor 4. The rotation angle of the rotor 4 is detected using the coil 13 as follows. Hereinafter, the operation of the three-phase AC rotating electric machine 1 when detecting the rotation angle of the rotor 4 will be described.

〔回転角検出動作〕
一般に、三相交流回転電機１が動作している際には、回転子４の爪状磁極から図１に示す矢印Ａ方向に漏れ磁束が発生する。より具体的には、回転子４は、回転軸方向から見ると図２に示すように、爪状磁極の位置に合わせて凹凸形状を有し、漏れ磁束はこの凹凸形状に応じて図３に示すように発生する（図３に示す例では、点Ｐ１，Ｐ２がそれぞれ凸部及び凹部に対応）。従って、回転子４の回転軸方向端面近傍に配設されたコイル８には回転子４の爪状磁極から生じる漏れ磁束が鎖交し、コイル１３には以下の数式１により表される誘起電圧が発生する。そして、このようにして発生した誘起電圧の大きさは、図４に示すように回転子４の回転角（電気角）に応じて変化するために（図４に示す例では、点Ｐ３，Ｐ４がそれぞれ凸部及び凹部に対応）、この三相交流回転電機１では、コイル１３が発生する誘起電圧の大きさに基づいて回転子４の回転角を検出する。なお、数式１中、Ｖ，Ｎ，φはそれぞれ、誘起電圧，コイル巻数，鎖交磁束を表す。

Figure 2006014523
(Rotation angle detection operation)
In general, when the three-phase AC rotating electric machine 1 is operating, leakage magnetic flux is generated from the claw-shaped magnetic poles of the rotor 4 in the direction of arrow A shown in FIG. More specifically, as shown in FIG. 2, the rotor 4 has an uneven shape according to the position of the claw-shaped magnetic pole when viewed from the direction of the rotation axis, and the leakage magnetic flux is shown in FIG. (In the example shown in FIG. 3, the points P1 and P2 correspond to a convex part and a concave part, respectively). Therefore, the leakage flux generated from the claw-shaped magnetic poles of the rotor 4 is linked to the coil 8 disposed in the vicinity of the end surface in the rotation axis direction of the rotor 4, and the induced voltage represented by the following formula 1 is applied to the coil 13. Occurs. The magnitude of the induced voltage generated in this way changes according to the rotation angle (electrical angle) of the rotor 4 as shown in FIG. 4 (in the example shown in FIG. 4, points P3 and P4). The three-phase AC rotating electric machine 1 detects the rotation angle of the rotor 4 based on the magnitude of the induced voltage generated by the coil 13. In Equation 1, V, N, and φ represent an induced voltage, the number of coil turns, and an interlinkage magnetic flux, respectively.
Figure 2006014523

以上の説明から明らかなように、本発明の実施形態となる三相交流回転電機１では、回転子４の回転軸方向端面近傍に回転子４の回転軸を軸として巻線されたコイル１３が配置され、回転子４の爪状磁極から生じる漏れ磁束によってコイル１３に発生する誘起電圧に基づいて回転子４の回転角を検出する。そして、このような構成によれば、回転子４の回転角を検出するためのコイル１３は、三相交流回転電機１のデッドスペース内に設けられ、回転子４の回転軸方向に装置を配設する必要が無いので、三相交流回転電機１の薄型化が可能になると同時に、三相交流回転電機１の回転軸方向の寸法を小さくすることができる。   As is clear from the above description, in the three-phase AC rotating electric machine 1 according to the embodiment of the present invention, the coil 13 wound around the rotating shaft of the rotor 4 around the rotating shaft direction end surface of the rotor 4 is provided. The rotation angle of the rotor 4 is detected based on the induced voltage generated in the coil 13 by the leakage magnetic flux generated from the claw-shaped magnetic pole of the rotor 4. According to such a configuration, the coil 13 for detecting the rotation angle of the rotor 4 is provided in the dead space of the three-phase AC rotating electric machine 1, and the device is arranged in the rotation axis direction of the rotor 4. Since the three-phase AC rotating electric machine 1 can be thinned, the dimension of the three-phase AC rotating electric machine 1 in the rotation axis direction can be reduced.

以上、本発明者によってなされた発明を適用した実施の形態について説明したが、この実施の形態による本発明の開示の一部をなす論述及び図面により本発明は限定されることはない。例えば、上記実施形態では、回転電機内にコイル１３を一つだけ設けたが、回転電機が三相交流回転電機である場合には、図５に示すように、回転子４の回転軸を中心としてＵ相用，Ｖ相用，Ｗ相用のコイル１３ｕ，１３ｖ，１３ｖを電気角１２０度間隔に配設することが望ましい。このような構成によれば、各コイルに発生する誘起電圧は、図６に示すように、電気角１２０度の位相差を有するので、各誘起電圧を固定子巻線５のＵ相，Ｖ相，Ｗ相に対応させることにより、三相交流のＵ相，Ｖ相，Ｗ相に対応した角度信号を検出し、固定子巻線５に通電する電流の切り替えタイミングを正確に判断し、精度良く回転角制御を行うことができる。このように、この実施の形態に基づいて当業者等によりなされる他の実施の形態、実施例及び運用技術等は全て本発明の範疇に含まれることは勿論であることを付け加えておく。   As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the description and the drawings that form part of the disclosure of the present invention according to this embodiment. For example, in the above embodiment, only one coil 13 is provided in the rotating electrical machine. However, when the rotating electrical machine is a three-phase alternating current rotating electrical machine, as shown in FIG. It is desirable that the U-phase, V-phase, and W-phase coils 13u, 13v, and 13v be disposed at an electrical angle interval of 120 degrees. According to such a configuration, as shown in FIG. 6, the induced voltage generated in each coil has a phase difference of 120 degrees in electrical angle. Therefore, each induced voltage is converted into the U phase and V phase of the stator winding 5. , W phase is detected, angle signals corresponding to the U phase, V phase, and W phase of the three-phase AC are detected, and the switching timing of the current to be supplied to the stator winding 5 is accurately determined, and the accuracy is accurately determined. Rotational angle control can be performed. As described above, it is a matter of course that all other embodiments, examples, operation techniques and the like made by those skilled in the art based on this embodiment are included in the scope of the present invention.

本発明の実施形態となる三相交流回転電機の構成を示す模式図である。It is a schematic diagram which shows the structure of the three-phase alternating current rotating electrical machine used as embodiment of this invention. 図１に示す三相交流回転電機における回転子の回転軸方向の構成を示す模式図である。It is a schematic diagram which shows the structure of the rotating shaft direction of the rotor in the three-phase alternating current rotary electric machine shown in FIG. 図１に示す三相交流回転電機における回転子の爪状磁極から生じる漏れ磁束を示す波形図である。It is a wave form diagram which shows the leakage magnetic flux which arises from the nail | claw-shaped magnetic pole of the rotor in the three-phase alternating current rotary electric machine shown in FIG. 図３に示す回転子の爪状磁極から生じる漏れ磁束によってコイルに発生する誘起電圧を示す波形図である。It is a wave form diagram which shows the induced voltage which generate | occur | produces in a coil by the leakage magnetic flux which arises from the claw-shaped magnetic pole of the rotor shown in FIG. 本発明の実施形態となる三相交流回転電機の応用例を説明するための模式図である。It is a schematic diagram for demonstrating the application example of the three-phase alternating current rotating electrical machine used as embodiment of this invention. 図５に示す三相交流回転電機における回転子の爪状磁極から生じる漏れ磁束によってコイルに発生する誘起電圧を示す波形図である。It is a wave form diagram which shows the induced voltage which generate | occur | produces in a coil by the leakage magnetic flux which arises from the claw-shaped magnetic pole of the rotor in the three-phase alternating current rotating electrical machine shown in FIG.

符号の説明Explanation of symbols

１：三相交流回転電機
２：界磁巻線
３：回転子コア
４：回転子
５：三相固定子巻線
６：固定子コア
７：固定子
８：ブラケット
９：軸受
１０：回転軸
１１：スリップリング
１２：界磁端子
１３：コイル
Ａ：漏れ磁束 1: three-phase AC rotating electric machine 2: field winding 3: rotor core 4: rotor 5: three-phase stator winding 6: stator core 7: stator 8: bracket 9: bearing 10: rotating shaft 11 : Slip ring 12: Field terminal 13: Coil A: Leakage magnetic flux

Claims (2)

爪状磁極を有する回転電機の回転角検出装置であって、
回転電機の回転子の回転軸方向端面に近接配置され、当該回転子の回転軸を軸として巻線されたコイルを備え、前記爪状磁極から生じる漏れ磁束によってコイルに誘起される電圧に基づいて回転子の回転角を検出すること
を特徴とする回転電機の回転角検出装置。 A rotation angle detection device for a rotating electrical machine having a claw-shaped magnetic pole,
Based on the voltage induced in the coil by the leakage magnetic flux generated from the claw-shaped magnetic pole, comprising a coil disposed close to the end surface in the rotation axis direction of the rotor of the rotating electrical machine and wound around the rotation axis of the rotor. An apparatus for detecting a rotation angle of a rotating electrical machine, wherein the rotation angle of a rotor is detected. 請求項１に記載の回転電機の回転角検出装置であって、
前記回転電機は、三相交流回転電機であり、前記コイルは、前記回転子の回転軸を中心として１２０度の電気角間隔で複数配置され、前記爪状磁極から生じる漏れ磁束によって電気角１２０度の位相差でコイルに誘起される電圧に基づいて回転子の回転角を検出すること
を特徴とする回転電機の回転角検出装置。 A rotation angle detection device for a rotating electrical machine according to claim 1,
The rotating electrical machine is a three-phase AC rotating electrical machine, and a plurality of the coils are arranged at an electrical angle interval of 120 degrees around the rotation axis of the rotor, and an electrical angle of 120 degrees is generated by leakage magnetic flux generated from the claw-shaped magnetic poles. A rotation angle detection device for a rotating electrical machine that detects a rotation angle of a rotor based on a voltage induced in a coil with a phase difference of.
JP2004189627A 2004-06-28 2004-06-28 Rotation angle detecting device for electric rotating machine Pending JP2006014523A (en)

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