JPS61280753A - Variable speed permanent magnet motor - Google Patents
Variable speed permanent magnet motorInfo
- Publication number
- JPS61280753A JPS61280753A JP12067185A JP12067185A JPS61280753A JP S61280753 A JPS61280753 A JP S61280753A JP 12067185 A JP12067185 A JP 12067185A JP 12067185 A JP12067185 A JP 12067185A JP S61280753 A JPS61280753 A JP S61280753A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- magnetic sensor
- permanent magnet
- armature
- sensor
- 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.)
- Pending
Links
Landscapes
- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は１回転子の永久磁石製の磁極の位置を検出する
センサを備えた可変速永久磁石電動機に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a variable speed permanent magnet electric motor equipped with a sensor for detecting the position of a permanent magnet magnetic pole of one rotor.
回転子に永久磁石製の磁極を設け、電機子は多相（一般
に三相）電機子巻線を設けた同期電動機に似た構造の電
動機で、電機子巻線へ供給する交流電源の周波数を変化
させるようにした可変速永久磁石電動機がある。It is a motor with a structure similar to a synchronous motor, in which the rotor has magnetic poles made of permanent magnets and the armature has a multi-phase (generally three-phase) armature winding. There are variable speed permanent magnet electric motors.
この電動機に連続トルクを発生するためには、磁極の位
置に応じて電機子巻線にインバータを介して所望の周波
数の電流を流すためのホール素子のような磁気センサが
必要である。In order to generate continuous torque in this electric motor, a magnetic sensor such as a Hall element is required to cause a current of a desired frequency to flow through the armature winding via an inverter depending on the position of the magnetic poles.
このため従来は第９図のように、別途に磁極■（図では
散点を付しであるが他との区分を明瞭にしたものであっ
て断面表示ではなく、複数個の突極である）の位置を検
出するための検出用永久磁石（１２）を回転子（１６）
のつば状部（１７）に設け、ベアリングブラケット（１
３）に支持部材（１５）を介して磁気センサ■を取付け
て、磁極検出を行なっていた。For this reason, in the past, as shown in Figure 9, magnetic poles were separately marked (dotted in the figure, but this was to clearly distinguish them from the others, and was not a cross-sectional representation, but multiple salient poles. ) for detecting the position of the rotor (16).
The bearing bracket (1) is provided on the collar (17) of the
3), a magnetic sensor (2) was attached via a support member (15) to detect the magnetic pole.
磁気センサ■は電機子巻線０に対して、ある定められた
正確な位置になければ、回転子の磁極と電機子巻線電流
の対応がつかない。磁気センサωをベアリングブラケッ
ト（１３）に取付けると、電機子巻線■との位置関係が
正確に得られず、回転むらを発生する。また仮に磁気セ
ンサωを正確な位置に取付けても、電動機の分解再組立
等の場合、組立精度が良くなければ、磁気センサ■と電
機子との関係位置がずれる場合があり、回転むらをおこ
す。Unless the magnetic sensor (2) is located at a certain precise position with respect to the armature winding 0, the magnetic poles of the rotor and the armature winding current will not correspond. When the magnetic sensor ω is attached to the bearing bracket (13), the positional relationship with the armature winding ② cannot be obtained accurately, resulting in uneven rotation. Furthermore, even if the magnetic sensor ω is installed in the correct position, if the assembly accuracy is not good when disassembling and reassembling the motor, the relative position between the magnetic sensor ω and the armature may shift, causing uneven rotation. .
また、三相巻線の場合、磁気センサ■は電気角で１２０
° 間隔に配置される。極数をＰとすると機械角では２
４０°／Ｐとなり、極数が多くなればなるほど、機械角
は小さくなる。In addition, in the case of a three-phase winding, the magnetic sensor ■ is 120 in electrical angle.
° Spaced at intervals. If the number of poles is P, then the mechanical angle is 2
40°/P, and the greater the number of poles, the smaller the mechanical angle.
そのため、極数が多くなれば位決め精度誤差は実質的に
はＰ／２倍と大きくなるので、磁気センサ■の位置決め
精度を特に確実にしなければならない。Therefore, as the number of poles increases, the positioning accuracy error increases by a factor of P/2, so the positioning accuracy of the magnetic sensor (2) must be particularly ensured.
さらにまた、第９図の従来構造では、磁極検出用の永久
磁石（１２）を別に設けるため、軸方向に長くなり、構
造が複雑になり、重量も重くなる。また取付部材（１５
）は径方向の力に弱いため、振動により、磁気センサ■
の在るべき位置がずれてくることもある。また電動機自
身には軸受を持たず、相手機械の回転軸に回転子（１６
）を嵌合するビルトインタイブの回転電機では、さらに
磁気センサ■の位置精度を保った構造にすることが難し
くなる。Furthermore, in the conventional structure shown in FIG. 9, since a permanent magnet (12) for magnetic pole detection is provided separately, the structure becomes longer in the axial direction, the structure becomes more complicated, and the weight becomes heavier. In addition, the mounting member (15
) is weak against radial force, so vibration may cause the magnetic sensor
Sometimes the position of the object may shift. In addition, the electric motor itself does not have a bearing, and the rotor (16
), it is even more difficult to create a structure that maintains the positional accuracy of the magnetic sensor (2) in a built-in type rotating electrical machine.
本発明は磁気センサを簡単に精度よく固定子に取付けら
れ、回転子位置の検出精度の良好な回転むらのない可変
速永久磁石電動機を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a variable speed permanent magnet electric motor in which a magnetic sensor can be easily and precisely attached to a stator, the rotor position can be detected with good accuracy, and there is no uneven rotation.
本発明は、リングに磁気センサを取付け、このセンサ付
リングを電機子鉄心内周面端部に装着することにより、
磁気センサの位置を正確不変にして、回転むらをなくし
、構造および組立を簡単にするものである。In the present invention, a magnetic sensor is attached to a ring, and the ring with the sensor is attached to the end of the inner circumferential surface of the armature core.
The position of the magnetic sensor remains accurate, eliminates uneven rotation, and simplifies structure and assembly.
以下、本発明の一実施例について、第１図ないし第５図
を参照して説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.
磁気センサ■としてホール素子を取付けたエポキシ樹脂
製でプリント配、ＩＲ（Ｑを有する。リング■を電機子
鉄心に）端部の内周面の段付部（４ａ）に埋め込み、電
機子鉄心（イ）と一体構造にしている。回転子（工６）
の突極形磁極として永久磁石■が用いられる。電機子鉄
心（イ）には三相の電機子巻線（ハ）が巻装されており
、インバータ（図示しない）で所望の周波数にされたＵ
、Ｖ、Ｗ相の電流は電気角で１２０° ずつ位相をずら
しており、磁気センサ■も電気角で１２０° ずつずれ
た位置に３個を固定する。The magnetic sensor ■ is made of printed epoxy resin with a Hall element attached, and is embedded in the stepped part (4a) of the inner circumferential surface of the end of the IR (having a Q ring ■) on the armature core. It has an integrated structure with (b). Rotor (engineering 6)
A permanent magnet (■) is used as the salient magnetic pole. A three-phase armature winding (c) is wound around the armature core (a), and the U is set to a desired frequency by an inverter (not shown).
, V, and W phase currents are shifted in phase by 120 degrees in electrical angle, and the three magnetic sensors (3) are also fixed at positions shifted by 120 degrees in electrical angle.
リング■は円弧状の取付穴（１０）を４個所設けて、周
方向の位置を調整できるようにしておき、位置調整後、
ねじ（１１）で鉄心（イ）に固定する。The ring ■ has four arc-shaped mounting holes (10) so that its position in the circumferential direction can be adjusted. After adjusting the position,
Fix it to the iron core (A) with screws (11).
次に作用について説明する。Next, the effect will be explained.
電機子電流を制御する磁気センサ■と、電機子巻線■と
の位置関係は予じめ決めることができるが、リング■の
取付精度が第６図の位置ずれ時の電流波形のように永久
磁石による界磁の磁束波形からずれ出すと、電流を流し
てもトルクを発生しない部分が生じて、トルクが小さく
なり、又トルクリップルの原因になるが、取付穴（１０
）が円弧状になっているから、リング（２）の取付位置
を調整して第６図の破線で示した正確な電流波形の位置
に移して１回転むらのない可変速永久磁石電動機を提供
できる。Although the positional relationship between the magnetic sensor ■ that controls the armature current and the armature winding ■ can be determined in advance, the mounting accuracy of the ring ■ is permanent, as shown in the current waveform when the position is misaligned in Figure 6. If it deviates from the magnetic flux waveform of the field generated by the magnet, there will be a part where no torque is generated even if current is passed, resulting in a small torque and causing torque ripple.
) has an arc shape, so by adjusting the mounting position of ring (2) and moving it to the position of the accurate current waveform shown by the broken line in Figure 6, a variable speed permanent magnet motor with no unevenness in one rotation is provided. can.
さらに電機子巻線■をスキ°ユした場合は、磁気センサ
■は電機子巻線（ハ）の鉄心端部分の位置を検出するこ
とになるので、電機子巻線■の中央部を検出し得るよう
に、わざと磁気センサ■の位置をずらす必要がある。従
って、取付穴（１０）を円弧状にしであることが有効で
ある。Furthermore, if the armature winding ■ is shifted, the magnetic sensor ■ will detect the position of the iron core end of the armature winding (c), so it will detect the center of the armature winding ■. It is necessary to intentionally shift the position of the magnetic sensor (■) so that it can be obtained. Therefore, it is effective to make the mounting hole (10) arc-shaped.
尚、本発明第７図に示すようにリング■に比透磁率が数
１０〜数１００のフェライトの磁性材■を用いて、その
表面にプリント配線されたフィルム（ハ）を接着すると
、磁気センサ■の感度を向上させるから、そのようにし
てもよいし、又、プリント配線の代りにホトエツチング
を利用した配線にしてもよい、又、第８図のようにリン
グ■に凹部０を設けて、この凹部（９）に磁気センサ■
の一部を埋め込み、磁気センサ（ト）のリング■に対す
る位置決めを正確かつ簡単にすることもできるので、そ
のようにしてもよい。またリング■を鉄心に）に接着剤
で接着してもよい。As shown in Fig. 7 of the present invention, if a magnetic material (C) of ferrite with a relative magnetic permeability of several tens to several hundreds is attached to the ring (C) and a printed wiring film (C) is adhered to the surface of the ring (C), a magnetic sensor can be formed. Since the sensitivity of (2) is improved, this may be done, or the wiring may be made using photoetching instead of printed wiring, or the recess 0 may be provided in the ring (2) as shown in Fig. 8. This recess (9) has a magnetic sensor■
It is also possible to embed a part of the magnetic sensor (G) in order to accurately and easily position the magnetic sensor (G) with respect to the ring (2). Alternatively, the ring (■) may be attached to the iron core) with adhesive.
以上説明したように本発明によれば、磁気センサと電機
子鉄心とを一体構造としたので、磁気センサの位置ずれ
がなく、従って回転むらを生ずることがなく、振動にも
強く、ビルトイン形の電動機にも使用でき、また直接に
磁極の永久磁石位置を検出しているので、電動機は軸方
向に短くなり、また構造が簡単になり、重量も軽くなる
可変速永久磁石電動機を提供することができる。As explained above, according to the present invention, since the magnetic sensor and the armature core are integrated, there is no positional shift of the magnetic sensor, and therefore no rotational unevenness occurs, and it is resistant to vibration. It can also be used in an electric motor, and since the permanent magnet position of the magnetic pole is directly detected, the motor can be shortened in the axial direction, and the structure can be simplified and the weight can be reduced.It is possible to provide a variable speed permanent magnet electric motor. can.
第１図は本発明の可変速永久磁石電動機の一実施例を示
す縦断面図、第２図は第１図の磁気センサの周辺を示す
横断面図、第３図は第１図の磁気センサとリングとの関
係位置を示す斜視図、第４図は第１図の磁気センサの配
線を示す展開図、第５図は第１図のリングの取付部を示
す側面図、第６図は界磁磁束と電流の位相の関係を示す
曲線図、第７図および第８図はそれぞれ異なる他の実施
例を示す要部断面図、第９図は従来例の縦断面図である
。
１・・・磁気センサ ２・・・リング３・・・永
久磁石層の磁極 ４・・・電機子鉄心４ａ・・・段部
５・・・電機子巻線代理人 弁理士 井
上 −男
＠１図
第 ２ 図 第 ３ 図第
４ 図FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the variable speed permanent magnet motor of the present invention, FIG. 2 is a cross-sectional view showing the vicinity of the magnetic sensor shown in FIG. 1, and FIG. 3 is a cross-sectional view showing the magnetic sensor shown in FIG. 1. FIG. 4 is a developed view showing the wiring of the magnetic sensor in FIG. 1, FIG. 5 is a side view showing the attachment part of the ring in FIG. A curve diagram showing the relationship between the magnetic flux and the phase of current, FIGS. 7 and 8 are sectional views of essential parts showing other different embodiments, and FIG. 9 is a longitudinal sectional view of a conventional example. 1... Magnetic sensor 2... Ring 3... Magnetic pole of permanent magnet layer 4... Armature core 4a... Step part
5...Armature winding agent Patent attorney Mr. Inoue @Figure 1 Figure 2 Figure 3 Figure 4
Claims (2)
内径側に対向する永久磁石製の磁極を有する回転子とを
備え、磁極の位置を磁気センサで検出し、その検出信号
によって電機子巻線に所望の周波数の交流を供給する可
変速永久磁石電動機において、電機子鉄心の内周面端部
に磁気センサ付リングを装着したことを特徴とする可変
速永久磁石電動機。(1) Equipped with an armature having a multiphase armature winding and a rotor having magnetic poles made of permanent magnets facing the inner diameter side of the armature, the position of the magnetic poles is detected by a magnetic sensor, and the detection signal is A variable speed permanent magnet motor that supplies alternating current at a desired frequency to an armature winding, characterized in that a ring with a magnetic sensor is attached to an end of an inner peripheral surface of an armature core.
部分は電機子鉄心端を段状に拡大した部分とすることを
特徴とする特許請求の範囲第１項記載の可変速永久磁石
電動機。(2) The variable speed permanent magnet electric motor according to claim 1, wherein the magnetic sensor is a Hall element, and the portion to which the ring is attached is a step-like enlarged portion of the end of the armature core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12067185A JPS61280753A (en) | 1985-06-05 | 1985-06-05 | Variable speed permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12067185A JPS61280753A (en) | 1985-06-05 | 1985-06-05 | Variable speed permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61280753A true JPS61280753A (en) | 1986-12-11 |
Family
ID=14792044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12067185A Pending JPS61280753A (en) | 1985-06-05 | 1985-06-05 | Variable speed permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61280753A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01170778A (en) * | 1987-12-24 | 1989-07-05 | Diesel Kiki Co Ltd | Closed-type electric compressor |
| DE19737702A1 (en) * | 1997-08-29 | 1999-04-22 | System Antriebstechnik Dresden | Rotor position transmitter for electronically driven motors with rotors equipped with permanent magnets |
| WO2007116956A1 (en) * | 2006-04-04 | 2007-10-18 | Toyota Jidosha Kabushiki Kaisha | Fixing structure for detection member and electric supercharger |
| EP2808983A1 (en) * | 2013-05-28 | 2014-12-03 | Maxon Motor AG | Encoder for a compact rotary encoder and electric motor with a compact rotary encoder |
| CN112763795A (en) * | 2020-12-30 | 2021-05-07 | 中国原子能科学研究院 | Side coupling cavity measuring device and side coupling cavity measuring method for coupling cavity accelerating structure |
| WO2023110615A1 (en) * | 2021-12-17 | 2023-06-22 | Moteurs Leroy-Somer | Rotary electrical machine with a magnetic sensor |
-
1985
- 1985-06-05 JP JP12067185A patent/JPS61280753A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01170778A (en) * | 1987-12-24 | 1989-07-05 | Diesel Kiki Co Ltd | Closed-type electric compressor |
| DE19737702A1 (en) * | 1997-08-29 | 1999-04-22 | System Antriebstechnik Dresden | Rotor position transmitter for electronically driven motors with rotors equipped with permanent magnets |
| DE19737702C2 (en) * | 1997-08-29 | 2001-10-18 | System Antriebstechnik Dresden | Rotor position encoder for an electronically commutated internal rotor motor with a permanent magnet rotor |
| WO2007116956A1 (en) * | 2006-04-04 | 2007-10-18 | Toyota Jidosha Kabushiki Kaisha | Fixing structure for detection member and electric supercharger |
| EP2808983A1 (en) * | 2013-05-28 | 2014-12-03 | Maxon Motor AG | Encoder for a compact rotary encoder and electric motor with a compact rotary encoder |
| CN112763795A (en) * | 2020-12-30 | 2021-05-07 | 中国原子能科学研究院 | Side coupling cavity measuring device and side coupling cavity measuring method for coupling cavity accelerating structure |
| WO2023110615A1 (en) * | 2021-12-17 | 2023-06-22 | Moteurs Leroy-Somer | Rotary electrical machine with a magnetic sensor |
| FR3131125A1 (en) * | 2021-12-17 | 2023-06-23 | Moteurs Leroy-Somer | Rotating electric machine with magnetic sensor |
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