JPS63129874A - Motor controller - Google Patents
Motor controllerInfo
- Publication number
- JPS63129874A JPS63129874A JP27330586A JP27330586A JPS63129874A JP S63129874 A JPS63129874 A JP S63129874A JP 27330586 A JP27330586 A JP 27330586A JP 27330586 A JP27330586 A JP 27330586A JP S63129874 A JPS63129874 A JP S63129874A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- circuit
- motor
- pulse width
- operating point
- 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.)
- Granted
Links
- 238000003079 width control Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Motor And Converter Starters (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、モータ起動時の過大な突入電流を防止するモ
ータ制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a motor control device that prevents excessive inrush current when starting a motor.
従来の技術
一般に直流モータの回転数を制御するには、供給電圧を
可変する手段がとられ、最近では効率の良いことから電
源電圧をパルス幅変調して制御する、いわゆるスイッチ
ングレギュレータ方式が用いられることが多い。Conventional technology In general, to control the rotational speed of a DC motor, a method is used to vary the supply voltage.Recently, the so-called switching regulator method, which controls the power supply voltage by pulse width modulation, has been used due to its high efficiency. There are many things.
第２図は従来のスイッチングレギュレータ方式のモータ
制御装置を示す構成図で、１は鋸歯状波発生回路、２は
パルス幅制御回路、３は電力制御回路、４は前置増幅回
路である。パルス幅制御回路２は鋸歯状波発生回路１の
出力鋸歯状波を回転数制御電圧をしきい値レベルとして
打ち抜き、波形整形動作をすることで回転数制御電圧に
比例したパルス幅をもつパルス信号を作り出している。FIG. 2 is a block diagram showing a conventional switching regulator type motor control device, in which 1 is a sawtooth wave generation circuit, 2 is a pulse width control circuit, 3 is a power control circuit, and 4 is a preamplifier circuit. The pulse width control circuit 2 punches out the sawtooth wave output from the sawtooth wave generation circuit 1 using the rotation speed control voltage as a threshold level, and performs waveform shaping to generate a pulse signal having a pulse width proportional to the rotation speed control voltage. is creating.
電力制御回路３は、パルス幅制御回路２の出力パルス信
号を入力としてスイッチング動作を行い、電源電圧をパ
ルス幅変調している。電力制御回路３の出力部分には大
容量のコンデンサーを備え、パルス電圧を積分化するこ
とでパルス幅に比例した出力電圧をつくり、モータ５の
回転数を電圧制御している。前置増幅回路４は、差動増
幅器で構成され、回転数制御電圧をパルス幅制御回路２
の入力レベルに適した値に増幅すると共に負入力側にフ
ィードバック電圧を供給することでフィードバック制御
を可能にしている。図中６はモータ５の回転数を検出す
る検知装置で前置増幅回路４にフィードバックするもの
である。７は電源回路である。The power control circuit 3 performs a switching operation using the output pulse signal of the pulse width control circuit 2 as input, and pulse width modulates the power supply voltage. The output portion of the power control circuit 3 is equipped with a large-capacity capacitor, and by integrating the pulse voltage, an output voltage proportional to the pulse width is created, and the rotation speed of the motor 5 is controlled by voltage. The preamplifier circuit 4 is composed of a differential amplifier, and the rotation speed control voltage is applied to the pulse width control circuit 2.
Feedback control is enabled by amplifying the signal to a value appropriate for the input level and supplying a feedback voltage to the negative input side. In the figure, 6 is a detection device that detects the rotation speed of the motor 5 and feeds it back to the preamplifier circuit 4. 7 is a power supply circuit.
発明が解決しようとする問題点
しかし従来の構成では、モータ起動時には直流モータ特
有の大きな突入電流が回路を流れ、これに対処するには
回路素子の電流定格を大きくする必要があった。特にフ
ィードバック制御時には前置増幅回路４の利得を大きく
設定するために、制御系の遅れ時間によって生ずるフィ
ードバック入力立ちあがり不足の間は、前置増幅回路４
は最大駆動に近い状態にあり、従ってモータに印加され
る電圧が最大に近く、さらに大きな突入電流が流れると
いう問題があった。Problems to be Solved by the Invention However, in the conventional configuration, when the motor is started, a large inrush current peculiar to a DC motor flows through the circuit, and in order to cope with this, it is necessary to increase the current rating of the circuit elements. In particular, in order to set the gain of the preamplifier circuit 4 to a large value during feedback control, during the insufficient rise of the feedback input caused by the delay time of the control system, the preamplifier circuit 4
is close to the maximum drive state, and therefore the voltage applied to the motor is close to the maximum, causing a problem in that a larger inrush current flows.
本発明は上記問題点を解決するために、モータの起動信
号に連動して＋ｉｉｒ置増装回路の基準動作点電圧を可
変することで回転数制御電圧を漸増制御し、モータの突
入電流を低減することのできるモータ制御装置を提供す
ることを目的とする。In order to solve the above-mentioned problems, the present invention gradually increases the rotation speed control voltage by varying the standard operating point voltage of the +IIR equipment expansion circuit in conjunction with the motor start signal, thereby reducing the inrush current of the motor. The purpose of the present invention is to provide a motor control device that can perform the following functions.
問題点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のモータ制御装置は、
入力信号のパルス幅を可変することで出力電圧を制御し
てモータの回転数を制御する電力制御回路と、可変パル
ス幅パルスの信号源となる鋸歯状波発生回路と、前記鋸
歯状波発生回路の出力鋸歯状波と回転数制御電圧とを比
較し、鋸歯状波を回転数に比例したパルス幅をもつパル
ス信号に変換し、前記電力制御回路の入力信号として供
給するパルス幅制御回路と、回転数制御電圧の増幅及び
フィードバック制御を行うための前置増幅回路と、前記
前置増幅回路の基準動作点電圧をモータ起動信号に連動
して可変することで回転数制御電圧の漸増制御を行うソ
フトスタート回路を備えた構成である。Means for Solving the Problems In order to achieve the above object, the motor control device of the present invention has the following features:
A power control circuit that controls the rotation speed of the motor by controlling the output voltage by varying the pulse width of an input signal, a sawtooth wave generation circuit that serves as a signal source of the variable pulse width pulse, and the sawtooth wave generation circuit. a pulse width control circuit that compares the output sawtooth wave with a rotational speed control voltage, converts the sawtooth wave into a pulse signal having a pulse width proportional to the rotational speed, and supplies the pulse signal as an input signal to the power control circuit; A preamplifier circuit for performing amplification and feedback control of the rotation speed control voltage, and a reference operating point voltage of the preamplification circuit is varied in conjunction with a motor start signal to perform gradual increase control of the rotation speed control voltage. This configuration includes a soft start circuit.
作 用
本発明は上記した構成により、前置増幅器の基準動作点
電圧をモータの起動信号に連動して低電位より漸増させ
ることにより、前置増幅回路の入力電位がどのようにあ
っても前置増幅回路の出力部分での回転数制御電圧は低
電位より漸増するため、モータは低電位で起動し、過大
な突入電流の防止を可能としている。Effect of the Invention With the above-described configuration, the present invention gradually increases the reference operating point voltage of the preamplifier from a low potential in conjunction with the motor starting signal, so that no matter what the input potential of the preamplifier circuit is, Since the rotational speed control voltage at the output section of the positional amplifier circuit gradually increases from a low potential, the motor starts at a low potential, making it possible to prevent excessive inrush current.
実施例
第１図は本発明の一実施例を示す構成図で、第２図の従
来例のモータ制御装置と同一機能を有する構成要素には
同一符号を付与し詳細な説明を省略する。８はソフトス
タート回路全体を示し、９はモータ起動信号に連動する
開閉器、１０は基準電源、１１はコンデンサ、１２は抵
抗、１３はダイオードである。開閉器９はモータ停止時
は閉路しており、モータ起動信号に連動して開路すると
、コンデンサ１１は基準電源１ｏにより充電され、その
電圧は抵抗１２の抵抗値とコンデンサ１１の容量できま
る時定数式に従い漸増する。前置増幅回路４内にある演
算増幅器４１の基準動作点電圧は正入力端子の電圧でき
まり、正入力端子はコンデンサ１１に接読されているた
め、基準動作点電圧も漸増し、結果として回転数制御電
圧が漸増する。このためパルス幅制御回路２は、鋸歯状
波発生回路１の出力鋸歯状波を低しきい値レベルから打
ち抜き初め、回転数制御電圧の漸増と共にしきい値レベ
ルを高め、除々にパルス幅を拡大していき、電力制御回
路３の出力電圧は低電位よりスタートし、パルス幅の拡
大に比例して除々に電圧が上昇するので過大な突入電流
を防止する。開閉器９はモータ停止時には再び閉路し、
コンデンサー１１の蓄漬電荷はダイオード１３を通じて
速やかに放電され、ソフトスタート回路８は直ちに次の
起動が可能な状態となる。Embodiment FIG. 1 is a configuration diagram showing an embodiment of the present invention, and components having the same functions as those of the conventional motor control device shown in FIG. 2 are given the same reference numerals and detailed explanations will be omitted. 8 shows the entire soft start circuit, 9 is a switch interlocked with a motor start signal, 10 is a reference power source, 11 is a capacitor, 12 is a resistor, and 13 is a diode. The switch 9 is closed when the motor is stopped, and when opened in conjunction with the motor start signal, the capacitor 11 is charged by the reference power supply 1o, and the voltage is determined by the time constant determined by the resistance value of the resistor 12 and the capacitance of the capacitor 11. Increase gradually according to the formula. The reference operating point voltage of the operational amplifier 41 in the preamplifier circuit 4 is determined by the voltage at the positive input terminal, and since the positive input terminal is directly connected to the capacitor 11, the reference operating point voltage also increases gradually, resulting in rotation. The number control voltage increases gradually. Therefore, the pulse width control circuit 2 starts punching out the output sawtooth wave of the sawtooth wave generation circuit 1 from a low threshold level, raises the threshold level as the rotation speed control voltage gradually increases, and gradually expands the pulse width. Then, the output voltage of the power control circuit 3 starts from a low potential and gradually increases in proportion to the expansion of the pulse width, thereby preventing an excessive rush current. The switch 9 closes again when the motor stops,
The stored charge in the capacitor 11 is quickly discharged through the diode 13, and the soft start circuit 8 is immediately ready for the next start-up.
なお本実施例では演算増幅器４１の正入力端子を基準動
作点電圧の可変手段として用いているため、回転数制御
電圧を反転電圧として負入力端子に加え、フィードバッ
ク入力と加算演算して差動増幅効果を得ている。（反転
回路は図示せず。）発明の効果
以上の実施例から明らかなように本発明は、前置増幅回
路の基準動作点電圧モータ起動信号に連動して可変する
ことで回転数制御電圧の漸増制御を行い、モータを低電
圧より起動させるようにした構成であるから、モータ起
動時の突入電流を低くおさえることが可能で、電源回路
や電力制御回路の電流定格を小さく設計できてコストが
安価となり、過大な突入電流が原因となる回路やモータ
の故障が少なくなり信頼性が向上するという優れた効果
を有するモータ制御装置を実現できる。In this embodiment, since the positive input terminal of the operational amplifier 41 is used as a means for varying the reference operating point voltage, the rotation speed control voltage is applied as an inverted voltage to the negative input terminal, and added to the feedback input to perform differential amplification. It's getting an effect. (The inverting circuit is not shown.) Effects of the Invention As is clear from the above embodiments, the present invention has the advantage of controlling the rotation speed control voltage by varying the reference operating point voltage of the preamplifier circuit in conjunction with the motor start signal. Since the configuration performs gradual increase control and starts the motor from a low voltage, it is possible to suppress the inrush current when starting the motor, and the current rating of the power supply circuit and power control circuit can be designed to be small, reducing costs. It is possible to realize a motor control device that is inexpensive, has excellent effects in that circuit and motor failures caused by excessive inrush current are reduced, and reliability is improved.
第１図は本発明の一実施例を示すモータ制御装置の構成
図、第２図は従来例のモータ制御装置の昂１成図である
。
１・・・・・・鋸歯状波発生回路、２・・・・・・パル
ス幅制御回路、３・・・・・・電力制御回路、４・・・
・・・前置増幅回路、８・・・・・・ソフトスタート回
路。FIG. 1 is a block diagram of a motor control device showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional motor control device. 1... Sawtooth wave generation circuit, 2... Pulse width control circuit, 3... Power control circuit, 4...
...Preamplifier circuit, 8...Soft start circuit.
Claims (1)
してモータの回転数を制御する電力制御回路と、可変パ
ルス幅パルスの信号源となる鋸歯状波発生回路と、前記
鋸歯状波発生回路の出力鋸歯状波と回転数制御電圧とを
比較し、鋸歯状波を回転数制御電圧に比例したパルス幅
をもつパルス信号に変換し、前記電力制御回路の入力信
号として供給するパルス幅制御回路と、回転数制御電圧
の増幅及びフィードバック制御を行うための前置増幅回
路と、前記前置増幅回路の基準動作点電圧をモータ起動
信号に連動して可変することで回転数制御電圧の漸増制
御を行うソフトスタート回路を備えたモータ制御装置。A power control circuit that controls the rotation speed of the motor by controlling the output voltage by varying the pulse width of an input signal, a sawtooth wave generation circuit that serves as a signal source of the variable pulse width pulse, and the sawtooth wave generation circuit. A pulse width control circuit that compares the output sawtooth wave with the rotation speed control voltage, converts the sawtooth wave into a pulse signal having a pulse width proportional to the rotation speed control voltage, and supplies the pulse signal as an input signal to the power control circuit. , a preamplifier circuit for amplifying and feedback controlling the rotational speed control voltage, and a gradual increase control of the rotational speed control voltage by varying the reference operating point voltage of the preamplifier circuit in conjunction with the motor start signal. A motor control device equipped with a soft start circuit that performs
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61273305A JPH0813193B2 (en) | 1986-11-17 | 1986-11-17 | Motor control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61273305A JPH0813193B2 (en) | 1986-11-17 | 1986-11-17 | Motor control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63129874A true JPS63129874A (en) | 1988-06-02 |
| JPH0813193B2 JPH0813193B2 (en) | 1996-02-07 |
Family
ID=17526013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61273305A Expired - Fee Related JPH0813193B2 (en) | 1986-11-17 | 1986-11-17 | Motor control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0813193B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0353074U (en) * | 1989-09-29 | 1991-05-22 | ||
| JPH0493496U (en) * | 1990-12-27 | 1992-08-13 | ||
| WO1994019863A1 (en) * | 1993-02-18 | 1994-09-01 | Robert Bosch Gmbh | Process for controlling the revolution speed of a motor |
| EP1039623A2 (en) * | 1999-03-26 | 2000-09-27 | Siemens Aktiengesellschaft | Actuator and auxilliar drive in a vehicule with DC-motor and limiting of inrush current |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53126114A (en) * | 1977-04-08 | 1978-11-04 | Okuma Machinery Works Ltd | Pulseewidth modulation servooamplifier |
| JPS59173000A (en) * | 1983-03-23 | 1984-09-29 | Hitachi Ltd | Excitation controller of synchronous machine |
| JPS59185187A (en) * | 1983-04-01 | 1984-10-20 | Fuji Xerox Co Ltd | Speed controller of copying machine |
| JPS60261378A (en) * | 1984-06-05 | 1985-12-24 | Nissan Motor Co Ltd | Controller for ac motor |
-
1986
- 1986-11-17 JP JP61273305A patent/JPH0813193B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53126114A (en) * | 1977-04-08 | 1978-11-04 | Okuma Machinery Works Ltd | Pulseewidth modulation servooamplifier |
| JPS59173000A (en) * | 1983-03-23 | 1984-09-29 | Hitachi Ltd | Excitation controller of synchronous machine |
| JPS59185187A (en) * | 1983-04-01 | 1984-10-20 | Fuji Xerox Co Ltd | Speed controller of copying machine |
| JPS60261378A (en) * | 1984-06-05 | 1985-12-24 | Nissan Motor Co Ltd | Controller for ac motor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0353074U (en) * | 1989-09-29 | 1991-05-22 | ||
| JPH0635572Y2 (en) * | 1989-09-29 | 1994-09-14 | アイホン株式会社 | Horizontal deflection circuit for video call equipment |
| JPH0493496U (en) * | 1990-12-27 | 1992-08-13 | ||
| WO1994019863A1 (en) * | 1993-02-18 | 1994-09-01 | Robert Bosch Gmbh | Process for controlling the revolution speed of a motor |
| US5747956A (en) * | 1993-02-18 | 1998-05-05 | Robert Bosch Gmbh | Method of controlling the rpm of a motor |
| EP1039623A2 (en) * | 1999-03-26 | 2000-09-27 | Siemens Aktiengesellschaft | Actuator and auxilliar drive in a vehicule with DC-motor and limiting of inrush current |
| EP1039623A3 (en) * | 1999-03-26 | 2003-09-03 | Siemens Aktiengesellschaft | Actuator and auxilliar drive in a vehicule with DC-motor and limiting of inrush current |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0813193B2 (en) | 1996-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |