JPS596786A - Control circuit for dc motor - Google Patents

Control circuit for dc motor

Info

Publication number
JPS596786A
JPS596786A JP11171482A JP11171482A JPS596786A JP S596786 A JPS596786 A JP S596786A JP 11171482 A JP11171482 A JP 11171482A JP 11171482 A JP11171482 A JP 11171482A JP S596786 A JPS596786 A JP S596786A
Authority
JP
Japan
Prior art keywords
circuit
motor
voltage
control
switching power
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
Application number
JP11171482A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Yamada
山田 一良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11171482A priority Critical patent/JPS596786A/en
Publication of JPS596786A publication Critical patent/JPS596786A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation

Abstract

PURPOSE:To reduce the power loss of a motor drive system by applying a control voltage applied to a motor drive circuit to a switching power source output voltage control circuit, and controlling the switching power source circuit by the output of the control circuit. CONSTITUTION:When a capstan motor or the like 3 of a VTR is controlled, a speed comparison and phase comparison control voltages to be applied to a motor drive circuit 2 are inputted from an input terminal 1 to a switching power source output control circuit 4, a switching power source circuit 5 is controlled by the output of the control circuit 4, thereby driving a motor 3 via the drive circuit 2. Accordingly, since the output voltage 6 of the circuit 5 is controlled substantially equal voltage to the control voltage always applied from the input terminal 1 by the control circuit 4, the power loss of the circuit 1 can be reduced, thereby saving the energy of the components.

Description

【発明の詳細な説明】 本発明は、特に省電力化に好適な直流モータ制御回路に
関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a DC motor control circuit particularly suitable for power saving.

第1図は従来の直流モータ制御回路の回路構成図を示す
。図においてAは速度、位相比較された制御′電圧、B
は直流モータ、Cは電源回路りは電源回路出力電圧、E
はモータ印加電圧、Fはモータ駆動回路を示す。本方式
において、電源回路Cの出力電圧りは直流モータBの負
荷変動や、特性のバラツキにより、通常必要なモータ印
加電圧Eより高めに設定する必要がある。
FIG. 1 shows a circuit diagram of a conventional DC motor control circuit. In the figure, A is the speed, the phase-compared control voltage, and B
is the DC motor, C is the power supply circuit, and E is the power supply circuit output voltage.
is the motor applied voltage, and F is the motor drive circuit. In this system, the output voltage of the power supply circuit C needs to be set higher than the normally required motor applied voltage E due to load fluctuations of the DC motor B and variations in characteristics.

このためモータ駆動回路Fはこの電圧の差に応゛じた電
力損失が大きい欠点があった。
For this reason, the motor drive circuit F has a drawback of large power loss in response to this voltage difference.

本発明の目的は、上記従来技術のモータ駆動回路の電力
損失を少なくした直流モータ制御回路を提供する事にあ
る。
An object of the present invention is to provide a DC motor control circuit that reduces the power loss of the motor drive circuit of the prior art.

本発明は、モータ駆動回路電源として、スイッチング電
源を使用し、モータ印加電圧とモータ駆動電圧の差を少
なく、両者の値を近づける事によりモータ駆動回路の電
力伊失を少なくするものである。
The present invention uses a switching power supply as the motor drive circuit power supply, reduces the difference between the motor applied voltage and the motor drive voltage, and brings the values of the two closer to each other, thereby reducing power loss in the motor drive circuit.

以下、本発明の一実施例を第2図により説明する。第2
図はVTR,のキャプスタンモータ制御回路の例である
。第2図において、1は速度比較、位相比Vされた結果
出力される制御電圧の入力端子、2はモータ駆動回路、
3は直流モ−タ、4はスイッチング電源出力電圧制御回
路、5はスイッチング電源回路、8はスイッチング電源
回路5に電力を供給する電源入力端子である。
An embodiment of the present invention will be described below with reference to FIG. Second
The figure shows an example of a capstan motor control circuit for a VTR. In FIG. 2, 1 is an input terminal for the control voltage output as a result of speed comparison and phase ratio V, 2 is a motor drive circuit,
3 is a DC motor, 4 is a switching power supply output voltage control circuit, 5 is a switching power supply circuit, and 8 is a power input terminal for supplying power to the switching power supply circuit 5.

第2図において、スイッチング電源回路5の出力電圧6
は制御回路4にて常に入力端子1から印加される制御電
圧とほぼ同電圧に制御される。またモータ印加電圧7は
モータ駆動回路2の出力トランジスタのペースエミッタ
間電圧Vlを引いた電圧になる。従ってモータ駆動回路
2の電力損失はVngとモータ電流の積となる。この状
態は制御入力電圧が高くなった場合あるいは低くなった
場合においてもスイッチング電源制御回路4の働きによ
り、常に制御電圧と、スイッチング電源出力電圧とがほ
ぼ等しくなる様に制御されるため、駆動回路2の電力損
失は少ない。また制御入力が急に変化した時、スイッチ
ング電源5は一般的に出力電圧を上げる方向は位相遅れ
を生じにくいが、下げる方向は回路内のコンデンサ等に
より位相遅れを生じやすいしかし本方式では、制御電圧
が下がった時、スイッチング電源回路5の出方電圧6が
下がりきれなくても、モータ印加電圧7はモータ駆動回
路2の働きで制御電圧に比例し下がるため位相遅れを生
じない。
In FIG. 2, the output voltage 6 of the switching power supply circuit 5
is always controlled by the control circuit 4 to be approximately the same voltage as the control voltage applied from the input terminal 1. Further, the motor applied voltage 7 is a voltage obtained by subtracting the pace emitter voltage Vl of the output transistor of the motor drive circuit 2. Therefore, the power loss of the motor drive circuit 2 is the product of Vng and motor current. In this state, even if the control input voltage becomes high or low, the switching power supply control circuit 4 always controls the control voltage and the switching power supply output voltage to be almost equal, so the drive circuit 2 has little power loss. In addition, when the control input changes suddenly, the switching power supply 5 is generally less likely to cause a phase lag in the direction of increasing the output voltage, but tends to cause a phase lag in the direction of decreasing the output voltage due to the capacitors in the circuit. When the voltage decreases, even if the output voltage 6 of the switching power supply circuit 5 cannot be lowered completely, the motor applied voltage 7 decreases in proportion to the control voltage due to the action of the motor drive circuit 2, so no phase lag occurs.

以上述べたように本発明によれば電力損失の少ないスイ
ッチング電源回路を使用し、しかも、モータ駆動回路へ
供給するこのスイッチング電源回路の出力電圧を、モー
タを制御する制御電圧で同時に制御するようにしたので
、モ〜り駆動系の電力損失が少なくなり、vT几などの
モータを使用する機器の省電力化に大きな効果がある。
As described above, according to the present invention, a switching power supply circuit with low power loss is used, and the output voltage of this switching power supply circuit, which is supplied to the motor drive circuit, is simultaneously controlled by the control voltage that controls the motor. Therefore, power loss in the motor drive system is reduced, which has a great effect on power saving in devices using motors such as vT.

【図面の簡単な説明】[Brief explanation of the drawing]

一夕制御回路図である。 2・・・モータ駆動回路  3・・・直流モ、−タ4・
・・スイッチング電源出力電圧制御回路5・・・スイッ
チング電源回路
It is an overnight control circuit diagram. 2... Motor drive circuit 3... DC motor, - motor 4.
...Switching power supply output voltage control circuit 5...Switching power supply circuit

Claims (1)

【特許請求の範囲】[Claims] 制御電圧によって直流上〜りに印加する電圧を制御する
モータ駆動回路を有するモータ駆動系において、スイッ
チング′電源回路と、このスイッチング電源回路の出力
′1圧を上記制御電圧によつ”C7j11 tJするス
イッチング′区源出力′亀圧制御回路とを設け、上記ス
イッチング電源回路の出力電圧を上記モータ駆動回路に
供給し、上記制御′成田によって直流モータへの印加電
圧を制御するとともにモータ駆動回路の供給電圧も同時
に制御するようにしたことを特徴とする直流モータ制御
回路。
In a motor drive system having a motor drive circuit that controls the voltage applied to the DC upper and lower sides by a control voltage, a switching power supply circuit and an output voltage of the switching power supply circuit are controlled by the control voltage. A switching power supply output voltage control circuit is provided to supply the output voltage of the switching power supply circuit to the motor drive circuit, and the control circuit controls the voltage applied to the DC motor and supplies the motor drive circuit. A DC motor control circuit characterized in that voltage is also controlled at the same time.
JP11171482A 1982-06-30 1982-06-30 Control circuit for dc motor Pending JPS596786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11171482A JPS596786A (en) 1982-06-30 1982-06-30 Control circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11171482A JPS596786A (en) 1982-06-30 1982-06-30 Control circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS596786A true JPS596786A (en) 1984-01-13

Family

ID=14568293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11171482A Pending JPS596786A (en) 1982-06-30 1982-06-30 Control circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS596786A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS646269U (en) * 1987-07-01 1989-01-13
US5085159A (en) * 1988-04-01 1992-02-04 Pegasus Sewing Machine Mfg. Co., Ltd. Needle thread feed regulating device for overseaming sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS646269U (en) * 1987-07-01 1989-01-13
US5085159A (en) * 1988-04-01 1992-02-04 Pegasus Sewing Machine Mfg. Co., Ltd. Needle thread feed regulating device for overseaming sewing machine

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