JPS5681091A - Speed control circuit for dc motor - Google Patents

Speed control circuit for dc motor

Info

Publication number
JPS5681091A
JPS5681091A JP15437579A JP15437579A JPS5681091A JP S5681091 A JPS5681091 A JP S5681091A JP 15437579 A JP15437579 A JP 15437579A JP 15437579 A JP15437579 A JP 15437579A JP S5681091 A JPS5681091 A JP S5681091A
Authority
JP
Japan
Prior art keywords
circuit
turned
motor
output
reference voltage
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
JP15437579A
Other languages
Japanese (ja)
Inventor
Yasuo Kominami
Yuichi Okubo
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 JP15437579A priority Critical patent/JPS5681091A/en
Publication of JPS5681091A publication Critical patent/JPS5681091A/en
Pending legal-status Critical Current

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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements 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
    • H02P7/18—Arrangements 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
    • H02P7/24—Arrangements 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
    • H02P7/28—Arrangements 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
    • H02P7/285—Arrangements 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
    • H02P7/288—Arrangements 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 variable impedance
    • H02P7/2885—Arrangements 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 variable impedance whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To increase the starting torque by providing a differential amplifier to which a reference voltage and the output voltage of the DC motor are supplied thereby the overload condition is detected. CONSTITUTION:A reference voltage generating circuit 11, a voltage comparing circuit 12, an output circuit 13, and a constant current circuit 14 constitute the control circuit for the DC motor 10. The output of the reference voltage generating circuit 11 is connected to one input of the voltage comparing circuit 12, and the output of the current mirror circuit to the output circuit 13 is fedback to the other input, thereby the counter-electromotive force Ea of the DC motor 10 becomes constant and the motor is driven at a constant rotational speed. At the normal operation, since the two inputs of the voltage comparing circuit 12 are balanced, differential-type detecting transistors Q4 and Q5 are balanced and the equal collector currents are supplied. Since the values of resistors R1 and R2 are determined as R1>R2, a transistor Q6 is turned OFF and Q7 is turned ON. At the time of starting, since the transistor Q4 is turned OFF, Q5 is turned ON, Q6 is turned ON, and Q7 is turned OFF; and the torque is increased.
JP15437579A 1979-11-30 1979-11-30 Speed control circuit for dc motor Pending JPS5681091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15437579A JPS5681091A (en) 1979-11-30 1979-11-30 Speed control circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15437579A JPS5681091A (en) 1979-11-30 1979-11-30 Speed control circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS5681091A true JPS5681091A (en) 1981-07-02

Family

ID=15582773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15437579A Pending JPS5681091A (en) 1979-11-30 1979-11-30 Speed control circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS5681091A (en)

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