JPH0365089A - Dc motor runaway detection method - Google Patents
Dc motor runaway detection methodInfo
- Publication number
- JPH0365089A JPH0365089A JP1201626A JP20162689A JPH0365089A JP H0365089 A JPH0365089 A JP H0365089A JP 1201626 A JP1201626 A JP 1201626A JP 20162689 A JP20162689 A JP 20162689A JP H0365089 A JPH0365089 A JP H0365089A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- motor
- value
- speed difference
- runaway
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はDCサーボモータの制御方式、特にそのDCサ
ーボモータの暴走検出方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a DC servo motor control method, and particularly to a runaway detection method for the DC servo motor.
従来、この種のDCサーボモータの速度制御方式はロー
タリエンコーダからのフォト信号を基にして、あらかじ
め指示した速度との速度差を検出してこの速度差をパル
ス幅変換し、モータの加速信号とモータ減速信号を発生
する。モータドライバ回路はこの2つの信号を基にモー
タ速度を制御する。Conventionally, the speed control method for this type of DC servo motor is based on a photo signal from a rotary encoder, detects the speed difference from a pre-instructed speed, converts this speed difference into a pulse width, and converts it into a motor acceleration signal. Generates motor deceleration signal. The motor driver circuit controls the motor speed based on these two signals.
このモータドライバ回路の一例を第3図に示す。第3図
に示された回路で、トランジスタ1がショート状態で壊
れた時、モータ3はモータ加速信号にかかわらず、常に
加速されることになる。An example of this motor driver circuit is shown in FIG. In the circuit shown in FIG. 3, when transistor 1 is short-circuited and broken, motor 3 will always be accelerated regardless of the motor acceleration signal.
したがって、トランジスタ1がショート状態で壊れた時
、モータ3は暴走し、モータ3を損傷するという欠点が
あった。Therefore, when the transistor 1 is short-circuited and broken, the motor 3 runs out of control, resulting in damage to the motor 3.
本発明は、DCサーボモータにおいてロータリエンコー
ダからのフォト信号を基に、モータの速度を検出して指
示速度と検出速度との速度差がある値以上になった時、
暴走状態として、検出することが可能であるような暴走
検出回路を有したDCサーボ制御回路を提供する。The present invention detects the speed of a DC servo motor based on a photo signal from a rotary encoder, and when the speed difference between the indicated speed and the detected speed exceeds a certain value,
To provide a DC servo control circuit having a runaway detection circuit capable of detecting a runaway state.
次に本発明の実施例について、図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第1図を参照すると、本発明の実施例はカウンタ4と、
速度差演算回路5と、パルス幅変換回路6と、演算回路
7とを含む。Referring to FIG. 1, an embodiment of the invention includes a counter 4;
It includes a speed difference calculation circuit 5, a pulse width conversion circuit 6, and a calculation circuit 7.
モータが暴走した時、ロータリエンコーダからのフォト
信号の周期は短かくなる。すると一定時間内にカウンタ
4でカウントする値は大きくなる。この値は、モータ速
度に対応していて、この値と指示速度データの値とを速
度差演算回路5に入力すると速度差データが得られる。When the motor runs out of control, the period of the photo signal from the rotary encoder becomes shorter. Then, the value counted by the counter 4 within a certain period of time increases. This value corresponds to the motor speed, and when this value and the value of the command speed data are input to the speed difference calculation circuit 5, speed difference data is obtained.
今、カウンタ4の値が指示速度データよりも大きいほど
、速度差データは大きくなる。この時、設定値つまり速
度差が設定以上になると演算回路7でモータの暴走を検
出し、アラーム信号を出力する。このタイムチャートを
第2図に示す。アラーム信号が出力されると、電源の供
給を止めモータの損傷を防ぐことができる。Now, the larger the value of the counter 4 is than the command speed data, the larger the speed difference data becomes. At this time, when the set value, that is, the speed difference exceeds the set value, the arithmetic circuit 7 detects runaway of the motor and outputs an alarm signal. This time chart is shown in FIG. When the alarm signal is output, the power supply can be stopped to prevent damage to the motor.
本発明には、以上説明したようにモータ速度と指示速度
との速度差を検出して、そのモータが暴走状態がどうか
を検出できるように構成することにより、暴走時にモー
タを損傷しないようにできるという効果がある。As explained above, the present invention is configured to detect the speed difference between the motor speed and the commanded speed to detect whether or not the motor is in a runaway state, thereby making it possible to prevent the motor from being damaged in the event of runaway. There is an effect.
第1図は本発明の実施例を示した回路図、第2図は第1
図に示した回路図のタイムチャート、第3図は従来例の
回路図である。
1、トランジスタ、2.トランジスタ、3.DCモータ
、4.カウンタ、5.速度差演算回路、6、パルス幅変
換回路、7.演算回路。Fig. 1 is a circuit diagram showing an embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
The time chart of the circuit diagram shown in the figure, and FIG. 3 is a circuit diagram of a conventional example. 1. Transistor; 2. transistor, 3. DC motor, 4. Counter, 5. Speed difference calculation circuit, 6. Pulse width conversion circuit, 7. Arithmetic circuit.
Claims (1)
からの検出速度データと指示速度データとを比較し、モ
ータの速度と指示速度との速度差を見て、モータが暴走
しているかどうかを検出することができるという特徴を
もったDCモータ暴走検出方式。In the speed control method of a DC servo motor, the detected speed data from the speed detector is compared with the commanded speed data, and the speed difference between the motor speed and the commanded speed is checked to detect whether the motor is running out of control. A DC motor runaway detection method that has the feature of being able to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1201626A JPH0365089A (en) | 1989-08-02 | 1989-08-02 | Dc motor runaway detection method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1201626A JPH0365089A (en) | 1989-08-02 | 1989-08-02 | Dc motor runaway detection method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0365089A true JPH0365089A (en) | 1991-03-20 |
Family
ID=16444187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1201626A Pending JPH0365089A (en) | 1989-08-02 | 1989-08-02 | Dc motor runaway detection method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0365089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112068608A (en) * | 2020-08-04 | 2020-12-11 | 深圳市海洋王照明工程有限公司 | Cloud deck control method, cloud deck, lighting equipment and storage medium |
-
1989
- 1989-08-02 JP JP1201626A patent/JPH0365089A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112068608A (en) * | 2020-08-04 | 2020-12-11 | 深圳市海洋王照明工程有限公司 | Cloud deck control method, cloud deck, lighting equipment and storage medium |
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