JP2624747B2 - Resolver - Google Patents
ResolverInfo
- Publication number
- JP2624747B2 JP2624747B2 JP63039654A JP3965488A JP2624747B2 JP 2624747 B2 JP2624747 B2 JP 2624747B2 JP 63039654 A JP63039654 A JP 63039654A JP 3965488 A JP3965488 A JP 3965488A JP 2624747 B2 JP2624747 B2 JP 2624747B2
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- JP
- Japan
- Prior art keywords
- stator teeth
- phase
- stator
- excitation
- resolver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、角度位置や回転速度の検出をおこなうレゾ
ルバに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a resolver that detects an angular position and a rotational speed.
（従来の技術） ロータの回転角度位置により、リラクタンス（磁気抵
抗）が変化し、このリラクタンス変化を利用して、回転
角度や回転速度を検出するVR（バリアブル・リラクタン
ス）形レゾルバにおいて、三相交流励磁のVRレゾルバ
は、第３図に示す様にステータ鉄心（１）に対してロー
タ（３）が１回転した時に一つのステータ歯（２）とロ
ータ（３）間の空隙部のパーミアンス（磁気抵抗の逆
数）変化が１周期の近似的正弦波関数となる様なロータ
構造となっている。例えば、ステータ中心（O1）に対し
て円筒磁性ロータの中心（O2）を偏心させるものであ
る。(Prior art) Reluctance (magnetic resistance) changes depending on the rotation angle position of a rotor, and a VR (variable reluctance) resolver that detects a rotation angle and a rotation speed using the reluctance change is a three-phase alternating current. As shown in FIG. 3, when the rotor (3) makes one rotation with respect to the stator core (1), the permeance (magnetic force) of the gap between one stator tooth (2) and the rotor (3) is increased. The rotor structure is such that the change (reciprocal of resistance) changes to an approximate sine wave function of one cycle. For example, the center (O 2 ) of the cylindrical magnetic rotor is eccentric with respect to the center (O 1 ) of the stator.
ステータ歯（２）には、磁界を形成するための励磁巻
線（４）とロータ位置により回転角度分だけ位相変調さ
れた信号を検出するための出力巻線（５）が集中巻され
ている。On the stator teeth (2), an excitation winding (4) for forming a magnetic field and an output winding (5) for detecting a signal phase-modulated by a rotation angle according to the rotor position are concentratedly wound. .
３相励磁の場合、３相のステータ歯（２）は、電気角
120゜（パーミアンス変化の基本波の１周期分を電気角3
60゜とする）間隔でU,V,W相のステータ歯（２）を設け
る。２極VR形レゾルバでは、機械角と電気角は同じとな
る。さらに、加工・製作による精度悪化を抑制するため
に、同相励磁のステータ歯（２）を180゜の位置に設け
る。この時、パーミアンス変化の位相は180゜ずれる
（逆極性となる）が出力巻線方向を逆向きにすることに
よって出力巻線（５）に生じる誘起電圧の向きを同方向
にしている。In the case of three-phase excitation, the three-phase stator teeth (2)
120 ゜ (one cycle of the fundamental wave of permeance change is an electrical angle of 3
U, V, W phase stator teeth (2) are provided at intervals of 60 °. In a two-pole VR resolver, the mechanical angle and the electrical angle are the same. Further, in order to suppress the deterioration of accuracy due to processing and manufacturing, stator teeth (2) for in-phase excitation are provided at positions of 180 °. At this time, the phase of the permeance change is shifted by 180 ° (has the opposite polarity), but by inverting the output winding direction, the direction of the induced voltage generated in the output winding (5) is made the same.
以下に、VR形レゾルバの作用を簡単な式であらわす。 Hereinafter, the operation of the VR resolver is represented by a simple equation.
出力電圧Vosは ここで N1は励磁側の巻数 N2は出力側の巻数 φは磁束 ｉは励磁電流 Ｐはパーミアンス P0はパーミアンスの直流分 P1はパーミアンスの基本波 ωは励磁周波数 θはロータ回転角度とする。The output voltage Vos Where N 1 is the number of turns on the excitation side N 2 is the number of turns on the output side φ is the magnetic flux i is the excitation current P is the permeance P 0 is the DC component of the permeance P 1 is the fundamental wave of the permeance ω is the excitation frequency θ is the rotor rotation angle I do.
そして、〔…〕内の第１項はＵ相、第２項はＶ相、第
３項はＷ相の要素を示す。The first term in [...] Indicates a U-phase element, the second term indicates a V-phase element, and the third term indicates a W-phase element.
以上、得られた出力電圧Vos＝Ksin（ωｔ−θ）と励
磁電圧Vin＝Esinωｔを位相比較することにより、ロー
タ回転角θを検出することができる。ただしＫは常数、
Ｅは励磁電圧の最大値とする。As described above, the rotor rotation angle θ can be detected by comparing the phases of the obtained output voltage Vos = Ksin (ωt−θ) and the excitation voltage Vin = Esinωt. Where K is a constant,
E is the maximum value of the excitation voltage.
（発明が解決しようとする課題） 従来のVR形レゾルバの信号波形とその時の位相差を第
４図に示す。即ち、励磁電圧を第４図（ａ）のように正
弦波で与えても、従来のVR形レゾルバは、パーミアンス
変化の２次高調波成分が大きく、このため、出力電圧に
２倍の角度で位相のずれた信号となりその信号が含まれ
て、出力電圧は歪み、本来の真の位相差（ロータ回転角
度）とは異なる位相ずれをおこす。即ち、２次の高調波
パーミアンスがある時の出力電圧波形は、第４図（ｂ）
に示すように基本波成分出力電圧と第４図（ｃ）に示す
２次高調波パーミアンスによる２次成分出力電圧を含む
ため、合成波出力電圧として第４図（ｄ）に示すように
歪み、励磁電圧との位相差はθ＋αとなる。(Problems to be Solved by the Invention) FIG. 4 shows a signal waveform of a conventional VR resolver and a phase difference at that time. That is, even if the excitation voltage is given by a sine wave as shown in FIG. 4 (a), the conventional VR type resolver has a large second harmonic component of the permeance change, and therefore, the output voltage is twice as large as the output voltage. The output voltage is distorted, and a phase shift different from the original true phase difference (rotor rotation angle) occurs. That is, the output voltage waveform when there is a second harmonic permeance is shown in FIG.
As shown in FIG. 4 (c), the output includes the fundamental component output voltage and the secondary component output voltage due to the second harmonic permeance shown in FIG. 4 (c). The phase difference from the excitation voltage is θ + α.
従って、ロータ回転角は、θ＋αとなり、αの角度誤
差が生じる。Therefore, the rotor rotation angle becomes θ + α, and an angle error of α occurs.
以上の様に従来の２極VR形レゾルバは、２次高調波パ
ーミアンスのため、出力電圧は歪み、レゾルバの角度検
出精度が悪化して、小形，簡素な構成にもかかわらず、
あまり産業上利用されていなかった。また、３次,4次等
の高調波成分を有する場合も同様であった。As described above, the conventional two-pole VR resolver has a second harmonic permeance, so the output voltage is distorted and the angle detection accuracy of the resolver is deteriorated.
It was not very used industrially. The same applies to the case of having third and fourth harmonic components.
本発明は２次,3次,4次等の高調波パーミアンス成分を
極力小さくすることにより、角度位置精度の良い２極VR
形レゾルバを提供することを目的とする。The present invention minimizes the second, third, and fourth harmonic permeance components to minimize the two-pole VR with high angular position accuracy.
An object of the present invention is to provide a shape resolver.
（課題を解決するための手段〕 上記目的を達成するために、本発明においては、ロー
タ鉄心とステータ歯間の空隙中のリラクタンスがロータ
鉄心位置により変化し、ロータ鉄心１回転でリラクタン
ス変化の基本波成分が１周期となる構造のステータとロ
ータを持ち、前記リラクタンス変化を検出することによ
り回転角度位置又は回転速度を検出する２極バリアブル
リラクタンス形レゾルバにおいて、３相交流励磁巻線と
出力巻線をそれぞれ別に持つ３個のステータ歯を120゜
間隔で設け、前記各相ステータ歯の180゜対称位置に前
記３相交流励磁巻線と同様の励磁巻線と、前記出力巻線
に対して巻方向を逆向きにした出力巻線を持つ３個のス
テータ歯を設けてＡ組のステータ歯とし、これらの６個
のＡ組のステータ歯に対し各々90゜ずれた位置に６個の
Ａ組と同様な巻線を持つＢ組のステータ歯を設け、各出
力巻線の出力を合成したことを特徴とするレゾルバを提
供する。(Means for Solving the Problems) In order to achieve the above object, in the present invention, the reluctance in the gap between the rotor core and the stator teeth changes according to the position of the rotor core, and the basics of the reluctance change in one rotation of the rotor core. In a two-pole variable reluctance resolver having a stator and a rotor having a structure in which a wave component has one cycle, and detecting a rotation angle position or a rotation speed by detecting the reluctance change, a three-phase AC excitation winding and an output winding Are provided at intervals of 120 °, respectively, and at the 180 ° symmetrical position of the stator teeth of each phase, the same windings as the three-phase AC exciting winding and the output winding are wound. Three stator teeth having output windings whose directions are reversed are provided to form A set of stator teeth, each of which is shifted by 90 ° from the six A set of stator teeth. The B group of the stator teeth with pieces of group A similar winding provided, provides a resolver, characterized in that by combining the outputs of the output winding.
（作 用） このように構成すると、Ａ組とＢ組の出力電圧波形の
基本波は正弦波であるから、両者を合成しても正弦波で
あり、Ａ組とＢ組の出力電圧波形の高調波同志を合成す
ると、互いに逆極性であるから、相互に打ち消される。
従って励磁電圧と出力電圧の波形の位相差を求めること
によりロータ回転角度が精度良く求められる。(Operation) With this configuration, the fundamental wave of the output voltage waveforms of the set A and the set B is a sine wave. When the harmonics are combined, they are mutually opposite because they have opposite polarities.
Therefore, the rotor rotation angle can be obtained with high accuracy by obtaining the phase difference between the waveforms of the excitation voltage and the output voltage.
（実施例） 以下、本発明の一実施例について、第１図，第２図を
参照して説明する。(Embodiment) An embodiment of the present invention will be described below with reference to FIG. 1 and FIG.
ロータ鉄心（３）は、ステータ鉄心（１）に対して偏
心した円筒状の磁性材から成り、ステータ鉄心と同心の
ロータシャフト（８）に取り付けられている。The rotor core (3) is made of a cylindrical magnetic material eccentric with respect to the stator core (1), and is attached to a rotor shaft (8) concentric with the stator core.
ステータ鉄心（１）には、12個のステータ歯（２）が
設けられており、各々の歯には、４極磁界を形成するた
めの励磁巻線（４）と、ロータ位置により変化したパー
ミアンスを利用して、ロータ回転角度を検出するための
出力巻線（５）の２つの巻線が集中巻されている。The stator core (1) is provided with twelve stator teeth (2). Each tooth has an excitation winding (4) for forming a quadrupole magnetic field, and a permeance changed according to the rotor position. , Two windings of an output winding (5) for detecting a rotor rotation angle are concentratedly wound.
励磁は、３相交流励磁で行い周波数は、数kHzであ
る。本レゾルバは、３相励磁であるので、３相のステー
タ歯U,V,Wは、電気角で120゜（パーミアンス変化の基本
波の１周期分を電気角360゜とし、２極VR形レゾルバで
あるから、ロータ１回転でパーミアンス変化１周期であ
り、電気角＝機械角となる）間隔で設ける。The excitation is performed by three-phase AC excitation, and the frequency is several kHz. Since this resolver is a three-phase excitation, the three-phase stator teeth U, V, W have an electrical angle of 120 ° (one cycle of the fundamental wave of permeance change is an electrical angle of 360 °, and a two-pole VR resolver Therefore, one rotation of the rotor is equivalent to one cycle of permeance change, and the electrical angle is equal to the mechanical angle.
更に、加工・製作による精度悪化を抑制するために、
180゜の位置のステータ歯を同相励磁とする。この時、
パーミアンス変化の基本波の位相は180゜ずれる（逆極
性）ので、出力巻線の巻方向を逆向きとすることによ
り、出力巻線に生ずる誘起電圧を同方向とする。Furthermore, in order to suppress the deterioration of accuracy due to processing and manufacturing,
The stator teeth at 180 ° are in-phase excitation. At this time,
Since the phase of the fundamental wave of the permeance change is shifted by 180 ° (reverse polarity), by inverting the winding direction of the output winding, the induced voltage generated in the output winding is made the same direction.
上記の６つのステータ歯をＡ組のステータ歯（６）と
すると、このＡ組のステータ歯（６）に対し、パーミア
ンス変化の基本波の位相がπ/2ずれる様に、Ａ組のステ
ータ歯に対し、電気角でπ/2（機械角でもπ/2＝90゜）
ずれた位置の６個の歯をＢ組のステータ歯（７）とす
る。Ｂ組の歯（７）は、Ａ組の歯（６）の位置からπ/2
ずらした位置に設けるが、励磁相順等はＡ組と同じであ
る。Assuming that the above-mentioned six stator teeth are A-set stator teeth (6), the A-set stator teeth are shifted from the A-set stator teeth (6) such that the phase of the fundamental wave of permeance change is shifted by π / 2. Π / 2 in electrical angle (π / 2 = 90 ° in mechanical angle)
The six teeth at the shifted positions are set as B sets of stator teeth (7). The set of teeth (7) is π / 2 from the position of the set of teeth (6).
Although they are provided at shifted positions, the excitation phase order and the like are the same as those of the group A.
次に上記構成の実施例の作用について説明する。 Next, the operation of the embodiment having the above configuration will be described.
３相の励磁巻線により４極の磁界が形成され、各出力
巻線（５）には、パーミアンス変化を受けた誘起電圧が
生じる。A four-pole magnetic field is formed by the three-phase excitation winding, and an induced voltage having a permeance change is generated in each output winding (5).
第２図（a,b,c,d,e,f）には、正弦波の励磁電圧
（ａ）と、Ａ組のステータ歯（６）で生じた出力電圧の
基本波成分（ｂ）と２次成分（ｃ）とＢ組のステータ歯
で生じた出力電圧の基本波成分（ｄ）と２次成分（ｅ）
と、A,B組の合成出力電圧（ｆ）とを示し、励磁電圧
（ａ）との位相関係を示している。ただし、パーミアン
ス変化は、基本波分と２次高調波成分からなっている場
合である。FIG. 2 (a, b, c, d, e, f) shows a sine wave excitation voltage (a) and a fundamental wave component (b) of an output voltage generated by the set A of stator teeth (6). The secondary component (c) and the fundamental component (d) and the secondary component (e) of the output voltage generated by the set B of stator teeth.
And the combined output voltage (f) of the sets A and B, and shows the phase relationship with the excitation voltage (a). However, the permeance change is a case where the change consists of a fundamental component and a second harmonic component.
A,B各組の出力電圧とも、第２図（ｂ），（ｄ）はパ
ーミアンスの基本波成分により生じた出力電圧を示し、
励磁電圧（ａ）との位相差はθ及びθ＋π/2であり、第
４図（ｃ），（ｅ）はパーミアンスの２次高調波成分に
より生じた出力電圧を示し、励磁電圧（ａ）との位相差
は２θ及び２θ＋πである。FIGS. 2 (b) and 2 (d) show the output voltage generated by the fundamental wave component of the permeance, with respect to the output voltage of each set of A and B.
The phase difference from the excitation voltage (a) is θ and θ + π / 2, and FIGS. 4 (c) and 4 (e) show the output voltage generated by the second harmonic component of the permeance. Are 2θ and 2θ + π.
Ｂ組のステータ歯は、Ａ組のステータ歯よりそれぞれ
π/2ずつずれた位置となっているため、Ｂ組の出力電圧
のパーミアンス基本波成分によるものは、Ａ組の電圧よ
りもπ/2位相がずれており、Ｂ組の出力電圧のパーミア
ンス２次高調波成分により生じる出力電圧は、Ａ組の同
じ２次高調波成分により生じる出力電圧よりもπだけ位
相がずれている。Since the stator teeth of the set B are shifted from the stator teeth of the set A by π / 2, respectively, the output of the set B due to the permeance fundamental wave component is π / 2 smaller than the voltage of the set A. The output voltages generated by the permeance second harmonic components of the output voltages of the set B are out of phase by π from the output voltages generated by the same second harmonic components of the set A.
レゾルバの出力電圧はＡ組とＢ組の合成となるため、
第２図に示す様に２次高調波成分により生じる電圧はＡ
組とＢ組で逆極性となり、お互いを打ち消し合う。した
がって、合成の出力電圧は、パーミアンスの基本波成分
による電圧のみとなるため、励磁電圧波形と位相比較す
ると、位相差θ＋π/4のみを検出することができ、−π
/4の位置に基準点を置くと、ロータ回転角θを精度良く
検出できる。Since the output voltage of the resolver is a combination of the sets A and B,
As shown in FIG. 2, the voltage generated by the second harmonic component is A
The pair and group B have opposite polarities and cancel each other. Therefore, the combined output voltage is only a voltage based on the fundamental wave component of the permeance. Therefore, when the phase is compared with the excitation voltage waveform, only the phase difference θ + π / 4 can be detected, and −π
By setting the reference point at the position of / 4, the rotor rotation angle θ can be detected with high accuracy.
上記実施例は２次高調波成分について説明したが、３
次,4次等の高調波成分に対しても、同様に打消し合って
上記実施例と同様の作用効果が得られる。In the above embodiment, the second harmonic component has been described.
The same effect can be obtained as in the above embodiment by canceling out the harmonic components such as the second and fourth harmonic components in the same manner.
本発明によれば、高調波パーミアンス成分による出力
電圧成分を極力小さくすることができるため、ロータ回
転角度を精度良く検出でき、２極VR形レゾルバを高精度
にすることができる。According to the present invention, since the output voltage component due to the harmonic permeance component can be minimized, the rotor rotation angle can be detected with high accuracy, and the two-pole VR resolver can have high accuracy.
第１図は本発明の２極VR形レゾルバの一実施例を示す横
断面図、第２図は第１図の装置の励磁電圧波形と出力電
圧波形を示す説明図、第３図は従来の例の横断面図、第
４図は第３図の装置の励磁電圧波形と出力電圧波形を示
す説明図である。 １……ステータ鉄心、２……ステータ歯 ３……ロータ鉄心、４……励磁巻線 ５……出力巻線、６……Ａ組ステータ歯 ７……Ｂ組ステータ歯、８……ロータシャフトFIG. 1 is a cross-sectional view showing an embodiment of a two-pole VR resolver according to the present invention, FIG. 2 is an explanatory view showing an excitation voltage waveform and an output voltage waveform of the apparatus shown in FIG. 1, and FIG. FIG. 4 is an explanatory view showing an excitation voltage waveform and an output voltage waveform of the apparatus shown in FIG. 1 ... stator core 2 ... stator teeth 3 ... rotor core 4 ... excitation winding 5 ... output winding 6 ... group A stator teeth 7 ... group B stator teeth 8 ... rotor shaft
Claims (1)
クタンスがロータ鉄心位置により変化し、ロータ鉄心１
回転でリラクタンス変化の基本波成分が１周期となる構
造のステータとロータを持ち、前記リラクタンス変化を
検出することにより回転角度位置又は回転速度を検出す
る２極バリアブルリラクタンス形レゾルバにおいて、３
相交流励磁巻線と出力巻線を夫々別に持つ３個のステー
タ歯を120゜間隔で設け、前記各相ステータ歯の180゜対
称位置に前記３相交流励磁巻線と同様の励磁巻線と、前
記出力巻線に対して巻方向を逆向きにした出力巻線を持
つ３個のステータ歯を設けてＡ組のステータ歯とし、こ
れらの６個のＡ組のステータ歯に対し各々90゜ずれた位
置に６個のＡ組と同様な巻線を持つＢ組のステータ歯を
設け、各出力巻線の出力を合成したことを特徴とするレ
ゾルバ。The reluctance in the gap between the rotor core and the stator teeth changes according to the position of the rotor core.
In a two-pole variable reluctance resolver having a stator and a rotor having a structure in which a fundamental wave component of a reluctance change becomes one cycle by rotation, and detecting a rotation angle position or a rotation speed by detecting the reluctance change,
Three stator teeth each having a phase AC excitation winding and an output winding are provided at 120 ° intervals, and an excitation winding similar to the three-phase AC excitation winding is provided at 180 ° symmetry of each phase stator tooth. Three stator teeth having output windings whose winding directions are reversed with respect to the output windings are provided as A sets of stator teeth, and each of the six A sets of stator teeth has a 90 ° angle. A resolver characterized in that B sets of stator teeth having windings similar to those of A sets are provided at shifted positions, and outputs of respective output windings are combined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039654A JP2624747B2 (en) | 1988-02-24 | 1988-02-24 | Resolver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63039654A JP2624747B2 (en) | 1988-02-24 | 1988-02-24 | Resolver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01218344A JPH01218344A (en) | 1989-08-31 |
| JP2624747B2 true JP2624747B2 (en) | 1997-06-25 |
Family
ID=12559073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63039654A Expired - Fee Related JP2624747B2 (en) | 1988-02-24 | 1988-02-24 | Resolver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624747B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1416254A1 (en) * | 2002-11-01 | 2004-05-06 | Mitsubishi Denki Kabushiki Kaisha | Rotation angle detecting device and electric rotary machine |
| WO2015111485A1 (en) | 2014-01-27 | 2015-07-30 | 日本精工株式会社 | Resolver device, motor, and actuator |
| CN108964392A (en) * | 2018-07-19 | 2018-12-07 | 哈尔滨工业大学 | The harmonic field of a kind of double three-phase synchronous motors and the motor orients brushless excitation method |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3060525B2 (en) * | 1990-11-02 | 2000-07-10 | 日本精工株式会社 | Resolver device |
| JP3047565B2 (en) * | 1991-10-29 | 2000-05-29 | 日本精工株式会社 | Variable reluctance resolver |
| FR2830933B1 (en) * | 2001-10-16 | 2006-09-15 | Mitsubishi Electric Corp | ROTATION ANGLE DETECTION DEVICE |
| JP4525628B2 (en) * | 2006-04-17 | 2010-08-18 | 三菱電機株式会社 | Rotation angle detector |
| DE102007004621A1 (en) * | 2007-01-30 | 2008-08-07 | Hiwin Mikrosystem Corp. | Motor position sensor, has resolver formed in motor, set of release coils wound around magnetic stator poles and corresponding to magnetic rotor poles, and main body rotor concentrically attached at motor spindle |
| KR101218563B1 (en) | 2010-05-20 | 2013-01-04 | 대성전기공업 주식회사 | Variable reluctance type resolver |
| DE102016202859B3 (en) * | 2016-02-24 | 2017-06-29 | Robert Bosch Gmbh | Rotation angle sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49124508A (en) * | 1973-04-02 | 1974-11-28 |
-
1988
- 1988-02-24 JP JP63039654A patent/JP2624747B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1416254A1 (en) * | 2002-11-01 | 2004-05-06 | Mitsubishi Denki Kabushiki Kaisha | Rotation angle detecting device and electric rotary machine |
| WO2015111485A1 (en) | 2014-01-27 | 2015-07-30 | 日本精工株式会社 | Resolver device, motor, and actuator |
| JP2015159705A (en) * | 2014-01-27 | 2015-09-03 | 日本精工株式会社 | Resolver device, motor, and actuator |
| CN105850014A (en) * | 2014-01-27 | 2016-08-10 | 日本精工株式会社 | Resolver device, motor, and actuator |
| US9716421B2 (en) | 2014-01-27 | 2017-07-25 | Nsk Ltd. | Resolver device, motor, and actuator |
| EP3101787A4 (en) * | 2014-01-27 | 2017-09-20 | NSK Ltd. | Resolver device, motor, and actuator |
| CN105850014B (en) * | 2014-01-27 | 2018-09-04 | 日本精工株式会社 | Resolver arrangement, motor and driver |
| CN108964392A (en) * | 2018-07-19 | 2018-12-07 | 哈尔滨工业大学 | The harmonic field of a kind of double three-phase synchronous motors and the motor orients brushless excitation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01218344A (en) | 1989-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |