JPS57173390A - Speed control circuit for dc motor - Google Patents

Speed control circuit for dc motor

Info

Publication number
JPS57173390A
JPS57173390A JP56058999A JP5899981A JPS57173390A JP S57173390 A JPS57173390 A JP S57173390A JP 56058999 A JP56058999 A JP 56058999A JP 5899981 A JP5899981 A JP 5899981A JP S57173390 A JPS57173390 A JP S57173390A
Authority
JP
Japan
Prior art keywords
amplifier
diode
output
motor
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.)
Pending
Application number
JP56058999A
Other languages
Japanese (ja)
Inventor
Taketoshi Araya
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.)
Fujitsu Ltd
Toray Industries Inc
Original Assignee
Fujitsu Ltd
Toray Industries Inc
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 Fujitsu Ltd, Toray Industries Inc filed Critical Fujitsu Ltd
Priority to JP56058999A priority Critical patent/JPS57173390A/en
Publication of JPS57173390A publication Critical patent/JPS57173390A/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 reduce the starting current and the power consumption of a DC motor by providing a clamping circuit which has a diode and an amplifier including saturating characteristic due to the increment simultaneously upon throwing of a power source of a constant current circuit at the branch from the output of a DC motor speed controlling amplifier. CONSTITUTION:A clamping circuit 36 which is branched from the output of a differential amplifier 21 and which has an amplifier 35 incrementing simultaneously upon throwing of a power source of a constant current amplifier 22 with saturating characteristic through a diode 31 is provided. The diode 31 operates as a clamping diode and clamps the output of the amplifier 21 to a value of the forward drop voltage of the diode 31 added to the output of the circuit 36. The total voltage is applied to the drive element at the starting time, but the current starts from zero and starts slowly. The currents increments to accelerate the DC motor 18, but since the counterelectromotive force becomes large, the voltage applied to the drive element becomes low, and the power consumption does not become large.
JP56058999A 1981-04-18 1981-04-18 Speed control circuit for dc motor Pending JPS57173390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56058999A JPS57173390A (en) 1981-04-18 1981-04-18 Speed control circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058999A JPS57173390A (en) 1981-04-18 1981-04-18 Speed control circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS57173390A true JPS57173390A (en) 1982-10-25

Family

ID=13100551

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058999A Pending JPS57173390A (en) 1981-04-18 1981-04-18 Speed control circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS57173390A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497684A (en) * 1972-03-29 1974-01-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497684A (en) * 1972-03-29 1974-01-23

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