GB1144792A - Electric motor control circuit - Google Patents

Electric motor control circuit

Info

Publication number
GB1144792A
GB1144792A GB1057166A GB1057166A GB1144792A GB 1144792 A GB1144792 A GB 1144792A GB 1057166 A GB1057166 A GB 1057166A GB 1057166 A GB1057166 A GB 1057166A GB 1144792 A GB1144792 A GB 1144792A
Authority
GB
United Kingdom
Prior art keywords
speed
motor
circuit
control circuit
electric motor
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
Application number
GB1057166A
Inventor
John MERRETT
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1057166A priority Critical patent/GB1144792A/en
Publication of GB1144792A publication Critical patent/GB1144792A/en
Expired 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
    • H02P7/292—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 static converters, e.g. AC to DC
    • H02P7/295—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 static converters, e.g. AC to DC of the kind having one thyristor or the like in series with the power supply and the motor

Landscapes

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

Abstract

1,144,792. Automatic control of speed. MULLARD Ltd. March 10, 1966, No. 10571/66. Heading G3R. In a system for controlling the speed of a D.C. motor 45, by adjustment of the firing angle of thyristors in a rectifier bridge B in response to its back e.m.f. a protection circuit G is provided comprising a thermistor connected to the thyristor trigger circuit I so as to reduce the back e.m.f. signal current thereto when the motor is starting or running at low speed. The reduced signal at low speed has the effect of delaying triggering more than would be due to the lower back e.m.f. alone, so that the feedback circuit remains in its stable range. Desired speed is set on a potentiometer in a back e.m.f. bridge circuit E. Separate limitation of the back e.m.f. and the motor current is provided by circuits F, H which are not described.
GB1057166A 1966-03-10 1966-03-10 Electric motor control circuit Expired GB1144792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1057166A GB1144792A (en) 1966-03-10 1966-03-10 Electric motor control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1057166A GB1144792A (en) 1966-03-10 1966-03-10 Electric motor control circuit

Publications (1)

Publication Number Publication Date
GB1144792A true GB1144792A (en) 1969-03-12

Family

ID=9970314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1057166A Expired GB1144792A (en) 1966-03-10 1966-03-10 Electric motor control circuit

Country Status (1)

Country Link
GB (1) GB1144792A (en)

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