JP2566777B2 - Constant current chopper driver for step motor - Google Patents
Constant current chopper driver for step motorInfo
- Publication number
- JP2566777B2 JP2566777B2 JP62152878A JP15287887A JP2566777B2 JP 2566777 B2 JP2566777 B2 JP 2566777B2 JP 62152878 A JP62152878 A JP 62152878A JP 15287887 A JP15287887 A JP 15287887A JP 2566777 B2 JP2566777 B2 JP 2566777B2
- Authority
- JP
- Japan
- Prior art keywords
- constant current
- current
- motor drive
- drive circuit
- circuit
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、FA機器やOA機器等に使用されるステップモ
ータを定電流駆動する定電流チョッパドライバに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a constant current chopper driver for driving a step motor used in FA equipment, OA equipment and the like with a constant current.
従来の技術 従来のこの種の定電流チョッパドライバは、高速回転
時の動トルクを保証するために、低速回転時に必要以上
のトルクを発生させていた。2. Description of the Related Art A conventional constant current chopper driver of this type has generated more torque than necessary during low speed rotation in order to guarantee dynamic torque during high speed rotation.
発明が解決しようとする問題点 そのため、低速域でエネルギー損失になるばかりでな
く、発熱および振動が大きくなるなどの問題があった。Problems to be Solved by the Invention Therefore, there is a problem that not only energy loss occurs in a low speed range but also heat generation and vibration increase.
本発明は、このような問題を簡単に解決することを目
的とする。The present invention aims to solve such problems easily.
問題点を解決するための手段 そのため、本発明では、電流検出回路で電流を検出し
ながらモータ駆動回路によってステップモータを定電流
駆動する定電流チョッパドライバにおいて、前記モータ
駆動回路に接続された検出抵抗と、この検出抵抗の両端
電圧が所定時間までに所定の高さになるかどうかを検出
する立上り時間検出回路と、その検出により立上り時間
が速いときは、前記モータ駆動回路に印加する電圧を低
下させ、立ち上がり時間が遅いときは、前記モータ駆動
回路に印加する電圧を上昇させる電圧制御回路とを備え
る。Therefore, in the present invention, in the constant current chopper driver that drives the step motor with a constant current by the motor drive circuit while detecting the current with the current detection circuit, the detection resistor connected to the motor drive circuit is used. And a rise time detection circuit that detects whether the voltage across the detection resistor reaches a predetermined height by a predetermined time, and if the rise time is fast as a result of the detection, lower the voltage applied to the motor drive circuit. And a voltage control circuit for increasing the voltage applied to the motor drive circuit when the rise time is slow.
作用 このような回路を備えると、電流の立上りが良好で動
トルクが大きい低速時には、電流の立上り時間が速いの
に応じて印加する電圧を低下させ、また電流の立上りが
悪く動トルクが小さい高速時には、電流の立上り時間が
遅いのに応じて印加する電圧を高めることができる。Operation With such a circuit, at low speeds where the current rises well and the dynamic torque is large, the applied voltage is reduced in response to the fast rise time of the current, and the current rises poorly and the dynamic torque is small. At times, the applied voltage can be increased according to the slow rise time of the current.
実施例 第１図はこの発明による定電流チョッパドライバのブ
ロック図で、ステップモータ（10）は、コントローラー
（11）の制御にしたがい電流検出回路（12）で電流を検
出されながら従来公知のモータ駆動回路（13）によって
定電流駆動される。このモータ駆動回路（13）は、具体
的には例えば第２図のような回路構成になっており、そ
れには検出抵抗（14）が備えられている。そこで、この
検出抵抗（14）の両端電圧が所定時間までに所定の高さ
になるかどうかを立上り時間検出回路（15）で検出し、
その大小に応じて電圧制御回路（16）でモータ駆動回路
（13）に印加する電圧を制御する。Embodiment FIG. 1 is a block diagram of a constant current chopper driver according to the present invention, in which a step motor (10) drives a conventionally known motor while a current is detected by a current detection circuit (12) according to control of a controller (11). It is driven with a constant current by a circuit (13). The motor drive circuit (13) has a specific circuit configuration as shown in FIG. 2, for example, and is provided with a detection resistor (14). Therefore, the rise time detection circuit (15) detects whether the voltage across the detection resistor (14) reaches a predetermined height by a predetermined time,
The voltage applied to the motor drive circuit (13) is controlled by the voltage control circuit (16) according to the magnitude.
すなわち、ステップモータ（10）の低速時は、第３図
に示すように電流の立上りが良好で動トルクが大きいた
め、その立上りが速いことを立上り検出回路（15）で検
出したならば、必要なトルクを得るための最低の電圧を
印加するようにして、低速時でのエネルギーのロス、必
要以上のトルクによる振動および発熱を抑える。That is, when the stepping motor (10) is at a low speed, the rising of the current is good and the dynamic torque is large as shown in FIG. 3, so if the rising detection circuit (15) detects that the rising is fast, it is necessary. By applying the lowest voltage for obtaining sufficient torque, energy loss at low speed, vibration and heat generation due to excessive torque are suppressed.
一方、高速時には、電流の立上りが第４図のように悪
いため、その遅いことを検出したならば、モータ駆動回
路（13）への印加電圧を高くし、必要なトルクを確保す
る。On the other hand, at the time of high speed, the rise of the current is bad as shown in FIG. 4, so if it is detected that the current is slow, the voltage applied to the motor drive circuit (13) is increased to secure the required torque.
発明の効果 本発明によれば、ステップモータの低消費電力化、発
熱および振動の軽減、必要トルクの維持が可能となる。
また、モータの速度を検知してその速度により電圧を制
御する間接的な制御ではなく、モータ駆動回路自体の電
流の立上り時間の遅速から当該モータ駆動回路へ印加す
る電圧を制御する直接的な制御であるため、応答性の良
い緻密な無段階制御を行える。EFFECTS OF THE INVENTION According to the present invention, it is possible to reduce power consumption of a step motor, reduce heat generation and vibration, and maintain required torque.
Further, instead of indirect control in which the motor speed is detected and the voltage is controlled by that speed, direct control is performed in which the voltage applied to the motor drive circuit is controlled from the slow rise time of the current of the motor drive circuit itself. Therefore, precise stepless control with good responsiveness can be performed.
第１図は本発明の実施例のブロック図、第２図はそのモ
ータ駆動回路の具体的回路図、第３図は低速時の電流の
立上り波形図、第４図は高速時の電流の立上り波形図で
ある。 （10）……ステップモータ （11）……コントローラー （12）……電流検出回路 （13）……モータ駆動回路 （14）……検出抵抗 （15）……立上り検出回路 （16）……電圧制御回路FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the motor drive circuit thereof, FIG. 3 is a current rising waveform diagram at low speed, and FIG. 4 is current rising at high speed. It is a waveform diagram. (10) Step motor (11) Controller (12) Current detection circuit (13) Motor drive circuit (14) Detection resistor (15) Rise detection circuit (16) Voltage Control circuit
Claims (1)
駆動回路によってステップモータを定電流駆動する定電
流チョッパドライバにおいて、前記モータ駆動回路に接
続された検出抵抗と、この検出抵抗の両端電圧が所定時
間までに所定の高さになるかどうかを検出する立上り時
間検出回路と、その検出により立上り時間が速いとき
は、前記モータ駆動回路に印加する電圧を低下させ、立
ち上がり時間が遅いときは、前記モータ駆動回路に印加
する電圧を上昇させる電圧制御回路とを備えたことを特
徴とする、ステップモータの定電流チョッパドライバ。1. In a constant current chopper driver for driving a step motor with a constant current by a motor drive circuit while detecting a current with a current detection circuit, a detection resistor connected to the motor drive circuit and a voltage across the detection resistor are detected. A rise time detection circuit that detects whether or not a predetermined height is reached by a predetermined time, and if the rise time is fast due to the detection, the voltage applied to the motor drive circuit is reduced, and if the rise time is slow, A constant current chopper driver for a step motor, comprising a voltage control circuit for increasing a voltage applied to the motor drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152878A JP2566777B2 (en) | 1987-06-19 | 1987-06-19 | Constant current chopper driver for step motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62152878A JP2566777B2 (en) | 1987-06-19 | 1987-06-19 | Constant current chopper driver for step motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63316699A JPS63316699A (en) | 1988-12-23 |
| JP2566777B2 true JP2566777B2 (en) | 1996-12-25 |
Family
ID=15550096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62152878A Expired - Lifetime JP2566777B2 (en) | 1987-06-19 | 1987-06-19 | Constant current chopper driver for step motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566777B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2609740B2 (en) * | 1990-04-18 | 1997-05-14 | 甲府日本電気株式会社 | Pulse motor driver |
| US6979972B2 (en) * | 2003-12-30 | 2005-12-27 | Xerox Corporation | Method and apparatus for detecting a stalled stepper motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5325085B2 (en) * | 1973-04-26 | 1978-07-25 | ||
| JPS51143816A (en) * | 1975-06-06 | 1976-12-10 | Kokusai Electric Co Ltd | Constant current power supply apparatus for pulse motor |
| JPS51143817A (en) * | 1975-06-06 | 1976-12-10 | Kokusai Electric Co Ltd | Power supply for pulse motor |
| JPS5678395A (en) * | 1979-11-28 | 1981-06-27 | Mitsubishi Electric Corp | Driving system for pulse-motor |
| JPS59181998A (en) * | 1983-03-30 | 1984-10-16 | Sanyo Electric Co Ltd | Drive device for pulse motor |
-
1987
- 1987-06-19 JP JP62152878A patent/JP2566777B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63316699A (en) | 1988-12-23 |
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