JPS6333392B2 - - Google Patents
Info
- Publication number
- JPS6333392B2 JPS6333392B2 JP56135050A JP13505081A JPS6333392B2 JP S6333392 B2 JPS6333392 B2 JP S6333392B2 JP 56135050 A JP56135050 A JP 56135050A JP 13505081 A JP13505081 A JP 13505081A JP S6333392 B2 JPS6333392 B2 JP S6333392B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- rotor
- rotational speed
- cylindrical rotor
- voltage control
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Description
【発明の詳細な説明】
本発明は負荷変動に対して直流ブラシレスモー
ターの回転速度を一定に保つための速度調整回路
であつて、永久磁石材製回転子、この回転子外周
に近接して設けた固定子巻線、回転子の位置検出
のための磁気感応素子等を具備した直流ブラシレ
スモーターの速度調整回路に関しては種々のもの
が提案されているが、いずれも複雑な構成を有し
調整に多くの手数を要し又高価なものとなる欠点
を有していた。例えば特開昭55−103091号は直流
ブラシレスモーターの速度調整回路の具体例を開
示しているが、本件調整回路はその構成要素とし
て乗算器、パルス発生器、Ｆ−Ｖコンバータを必
須の要件とする極めて複雑な構成となつている。
特に乗算器、Ｆ−Ｖコンバータを用いることは装
置の生産コストを著るしく高いものとするばかり
でなく乗算器のオフセツト電圧の調整に手数を要
し又モーター特性の劣化を生じ易い欠点を有して
いた。DETAILED DESCRIPTION OF THE INVENTION The present invention is a speed adjustment circuit for keeping the rotational speed of a DC brushless motor constant against load fluctuations, and comprises a rotor made of a permanent magnetic material, and a speed adjustment circuit provided close to the outer periphery of the rotor. Various types of speed adjustment circuits have been proposed for DC brushless motors equipped with stator windings, magnetic sensing elements for rotor position detection, etc., but all of them have complex configurations and are difficult to adjust. It has the disadvantage that it requires a lot of work and is expensive. For example, JP-A-55-103091 discloses a specific example of a speed adjustment circuit for a DC brushless motor, but this adjustment circuit requires a multiplier, a pulse generator, and an F-V converter as its essential components. It has an extremely complex structure.
In particular, the use of multipliers and F-V converters not only significantly increases the production cost of the device, but also requires time and effort to adjust the offset voltage of the multiplier, and has the disadvantage of easily causing deterioration of motor characteristics. Was.
本発明は上述の如き欠点を除去したものであつ
て、大幅な負荷変動を受けても広範囲な回転速度
に於て定速特性を有する直流ブラシレスモーター
の速度調整回路に係るものである。以下本発明の
一実施例を第１図に於て説明すれば、１は永久磁
石材により形成した円筒形回転子で、回転に伴な
いホール素子２，３に正弦波状電圧を発生させる
よう着磁している。第１図に示すものは二相の場
合を示し、ホール素子２，３は直角に配置されて
いるので、円筒形回転子１の回転に伴ない互いに
90゜位相の異なる一定振幅の正弦波状電圧が発生
する。ホール素子２，３からの正弦波状信号は電
圧増幅器４，５を介して電圧制御増幅器６，７の
入力として供給されるとともに微分回路８、AC
−DCコンバータ９により回転速度に比例した直
流電圧に変換され、基準電圧との比較動作をする
差動増幅器１１の入力に加えられる。この差動増
幅器１１の出力電圧、すなわち偏差信号は電圧制
御増幅器６，７の制御電圧として作用する。電圧
制御増幅器６，７はその制御電圧に比例して利得
が高くなる特性を有するので、入力電圧は互いに
90゜の位相差を保ちつつ差動増幅器１１からの制
御電圧に対応した大きさに増幅され、Ｖ−Ｉ変換
形パワー増幅器１２，１３によりパワー増幅され
て固定子巻線１４，１５に二相正弦波電流として
供給される。以上の如く固定子巻線１４，１５に
は円筒形回転子１の回転に完全に対応した二相正
弦波電流が流れる結果、回転子の角度に関係なく
一定のトルクを生じ回転が持続される。 The present invention eliminates the above-mentioned drawbacks and relates to a speed adjustment circuit for a DC brushless motor that has constant speed characteristics over a wide range of rotational speeds even when subjected to large load fluctuations. An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 1 denotes a cylindrical rotor made of a permanent magnet material, which is attached to generate a sinusoidal voltage in Hall elements 2 and 3 as it rotates. It's magnetic. The one shown in FIG. 1 shows a two-phase case, and since the Hall elements 2 and 3 are arranged at right angles, they mutually interact with each other as the cylindrical rotor 1 rotates.
A constant amplitude sinusoidal voltage with a 90° phase difference is generated. The sinusoidal signals from the Hall elements 2 and 3 are supplied as inputs to voltage control amplifiers 6 and 7 via voltage amplifiers 4 and 5, as well as to a differentiating circuit 8 and an AC
- It is converted into a DC voltage proportional to the rotational speed by the DC converter 9, and is applied to the input of the differential amplifier 11 which performs a comparison operation with a reference voltage. The output voltage of the differential amplifier 11, that is, the deviation signal, acts as a control voltage for the voltage control amplifiers 6 and 7. Since the voltage control amplifiers 6 and 7 have a characteristic that the gain increases in proportion to the control voltage, the input voltages are
It is amplified to a magnitude corresponding to the control voltage from the differential amplifier 11 while maintaining a phase difference of 90 degrees, and the power is amplified by the V-I conversion type power amplifiers 12 and 13, and the two-phase voltage is applied to the stator windings 14 and 15. Supplied as a sinusoidal current. As described above, as a result of the two-phase sinusoidal current flowing through the stator windings 14 and 15 that completely corresponds to the rotation of the cylindrical rotor 1, a constant torque is generated regardless of the rotor angle, and rotation is maintained. .
次に本発明の速度調整回路の構成要素である微
分回路８および絶対値平均回路で構成したAC−
DCコンバータ９の回転速度：電圧変換の動作に
つき説明する。 Next, an AC-
Rotational speed of DC converter 9: The operation of voltage conversion will be explained.
第１図における電圧増幅器４からの正弦波信号
を次式で表わす。 The sine wave signal from the voltage amplifier 4 in FIG. 1 is expressed by the following equation.
ｅ＝sinωt ………(1)
上記式に於てωは回転子の角速度を表わす。(1)
式を微分操作すると
e′＝de／dtωcosωt ………(2)
となり、AC−DCコンバータ９を絶対値平均回路
で構成したからその出力は下記(3)式の如くにな
り、回転速度に比例した直流電圧の得られること
が理解できる。 e=sinωt (1) In the above equation, ω represents the angular velocity of the rotor. (1)
Differentiating the equation yields e'=de/dtωcosωt (2), and since the AC-DC converter 9 is configured with an absolute value averaging circuit, its output is as shown in equation (3) below, which is proportional to the rotation speed. It can be understood that a DC voltage can be obtained.
eD＝１／Ｔ∫T 0｜e′｜dt＝２／πω……
…(3)
以上の如く構成した速度調整回路を有する直流
ブラシレスモーターの作用を第１図により説明す
れば、まずモーターの負荷が増加すると回転子１
の回転速度が下がり、ホール素子２，３に発生す
る正弦波信号の周波数が低くなり、AC−DCコン
バータ９の出力電圧が低下する。その結果、差動
増幅器１１の出力電圧が大きくなり電圧制御増幅
器６，７の利得が増加するため、パワー増幅器１
２，１３の入力電圧が大きくなり固定子巻線１
４，１５に供給される電流が増加し、発生トルク
が大きくなるので回転子１の回転速度が上昇し基
準電圧１６で設定された回転速度に復帰する。 e D = 1/T∫ T 0 ｜e′｜dt=2/πω……
...(3) To explain the operation of a DC brushless motor having a speed adjustment circuit configured as above using Fig. 1, first, when the load on the motor increases, the rotor 1
The rotational speed of the AC-DC converter 9 decreases, the frequency of the sine wave signal generated in the Hall elements 2 and 3 decreases, and the output voltage of the AC-DC converter 9 decreases. As a result, the output voltage of the differential amplifier 11 increases and the gains of the voltage control amplifiers 6 and 7 increase, so the power amplifier 1
The input voltage of 2 and 13 increases and the stator winding 1
4 and 15 increases, and the generated torque increases, so the rotational speed of the rotor 1 increases and returns to the rotational speed set by the reference voltage 16.
又逆にモーターの負荷が減少すると回転子１の
回転速度が上昇するから、ホール素子２，３に発
生する正弦波信号の周波数が高くなり、AC−DC
コンバータ９の出力電圧が上昇し、その結果差動
増幅器１１の出力電圧が小さくなり電圧制御増幅
器６，７の利得が減少するため、パワー増幅器１
２，１３の入力電圧が小さくなり固定子巻線１
４，１５に供給される電流が減少し、発生トルク
が小さくなるので回転子１の回転速度が低下し基
準電圧１６で設定された回転速度に複帰する。又
本発明速度調整回路を具備した直流ブラシレスモ
ーターの速度：トルク特性の実施例を第２図に示
している。 Conversely, when the motor load decreases, the rotational speed of the rotor 1 increases, so the frequency of the sine wave signal generated in the Hall elements 2 and 3 increases, and the AC-DC
The output voltage of the converter 9 increases, and as a result, the output voltage of the differential amplifier 11 decreases, and the gains of the voltage control amplifiers 6 and 7 decrease.
The input voltage of 2 and 13 becomes smaller and the stator winding 1
4 and 15 decreases, and the generated torque becomes smaller, so the rotational speed of the rotor 1 decreases and returns to the rotational speed set by the reference voltage 16. FIG. 2 shows an example of the speed/torque characteristics of a DC brushless motor equipped with the speed adjustment circuit of the present invention.
以上の如く本発明は従来の直流ブラシレスモー
ターの速度調整回路に比し、簡易な手段で大幅な
負荷変動にもかかわらずモーターの回転速度を一
定値に保つ事を可能とするものである。 As described above, the present invention makes it possible to maintain the rotational speed of the motor at a constant value with a simpler means than the conventional speed adjustment circuit for a DC brushless motor, despite significant load fluctuations.
第１図は本発明の一実施例を示す構成図、第２
図は本発明実施例による速度：トルク特性を示す
グラフである。
１……円筒形回転子、２，３……ホール素子、
６，７……電圧制御増幅器、９……AC−DCコン
バータ、１１……差動増幅器、１４，１５……固
定子巻線、１６……基準電圧。
FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The figure is a graph showing speed:torque characteristics according to an embodiment of the present invention. 1... Cylindrical rotor, 2, 3... Hall element,
6, 7... Voltage control amplifier, 9... AC-DC converter, 11... Differential amplifier, 14, 15... Stator winding, 16... Reference voltage.
Claims (1)
回転子外周に近接して設けた固定子巻線と、円筒
形回転子の位置検出手段としてのホール素子とか
ら成る直流ブラシレスモーターに於て、回転速度
に同期した正弦波状の電圧をホール素子に発生さ
せるよう円筒形回転子に着磁し、上記正弦波電圧
を増幅して電圧制御増幅器の入力とするとともに
微分操作し、絶対値平均回路で構成したAC−DC
コンバータを介して回転速度に比例した直流電圧
とし、この直流電圧と任意の手段で変更し得る基
準電圧とを差動増幅器で比較して偏差信号を得る
とともにこの偏差信号により制御される電圧制御
増幅器を有し、この電圧制御増幅器の出力を増幅
して固定子巻線に供給する事により負荷変動にか
かわらずモーターの回転速度を一定値に保つよう
にしたことを特徴とする直流ブラシレスモーター
の速度調整回路。1. In a DC brushless motor consisting of a cylindrical rotor made of a permanent magnetic material, a stator winding provided close to the outer periphery of the rotor, and a Hall element as a means for detecting the position of the cylindrical rotor. , a cylindrical rotor is magnetized to generate a sinusoidal voltage in the Hall element in synchronization with the rotational speed, and the sinusoidal voltage is amplified and input to a voltage control amplifier, and differentiated to create an absolute value averaging circuit. AC-DC composed of
A DC voltage proportional to the rotation speed is generated through a converter, and this DC voltage is compared with a reference voltage that can be changed by any means using a differential amplifier to obtain a deviation signal, and a voltage control amplifier is controlled by this deviation signal. A DC brushless motor characterized in that the output of the voltage control amplifier is amplified and supplied to the stator winding to maintain the rotational speed of the motor at a constant value regardless of load fluctuations. Adjustment circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56135050A JPS5836184A (en) | 1981-08-28 | 1981-08-28 | Speed adjusting circuit for dc brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56135050A JPS5836184A (en) | 1981-08-28 | 1981-08-28 | Speed adjusting circuit for dc brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5836184A JPS5836184A (en) | 1983-03-03 |
| JPS6333392B2 true JPS6333392B2 (en) | 1988-07-05 |
Family
ID=15142752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56135050A Granted JPS5836184A (en) | 1981-08-28 | 1981-08-28 | Speed adjusting circuit for dc brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836184A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0740782B2 (en) * | 1986-03-13 | 1995-05-01 | 赤井電機株式会社 | Brushless servomotor with frequency generator coil |
| JPH02188182A (en) * | 1989-01-13 | 1990-07-24 | Copal Electron Co Ltd | Speed control method for light deflector |
| JPH06301984A (en) | 1993-04-12 | 1994-10-28 | Olympus Optical Co Ltd | Optical information recording and/or reproducing apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54118756A (en) * | 1978-03-08 | 1979-09-14 | Hitachi Denshi Ltd | Multiplication circuit |
| GB2039095B (en) * | 1978-12-07 | 1982-11-24 | Hansen J S | Electric motors speed regulation |
-
1981
- 1981-08-28 JP JP56135050A patent/JPS5836184A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5836184A (en) | 1983-03-03 |
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