GB671080A - Improvements relating to electric motor control systems - Google Patents

Improvements relating to electric motor control systems

Info

Publication number
GB671080A
GB671080A GB29613/49A GB2961349A GB671080A GB 671080 A GB671080 A GB 671080A GB 29613/49 A GB29613/49 A GB 29613/49A GB 2961349 A GB2961349 A GB 2961349A GB 671080 A GB671080 A GB 671080A
Authority
GB
United Kingdom
Prior art keywords
motor
resistor
exciter
speed
busbars
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
GB29613/49A
Inventor
Allan Asbury
Graham Rudge Wilson
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.)
English Electric Co Ltd
Original Assignee
English Electric Co 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB29613/49A priority Critical patent/GB671080A/en
Publication of GB671080A publication Critical patent/GB671080A/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
    • H02P7/34—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 Ward-Leonard arrangements
    • H02P7/347—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 Ward-Leonard arrangements in which only the generator field is controlled

Abstract

671,080. Control of D.C. motors. ENGLISH ELECTRIC CO., Ltd. Nov. 17, 1950. [Nov. 18, 1949] No. 29613/49. Class 38 (iii). [Also in Group XXXV] In a D.C. rolling mill motor, normally arranged to run at a constant speed but compounded so that its speed varies to a small extent with the load, the compounding is made adjustable to meet various load requirements. The motor armature is supplied from a Ward- Leonard generator 4, the field 4a of which is in series with an amplifying exciter 6 across busbars 7 supplied from an exciter 8. The control winding 6a of the amplifying exciter 6 is connected in series with an anti-hunt winding 4b on the generator, a resistor 10, and a tachogenerator 11 (driven by the motor) across the busbars 7. Deviation of the speed of the motor from a value predetermined by the voltage at the busbars 7 varies the resultant voltage applied to the control winding 6a to correct the deviation. A voltage proportional to motor current is tapped off resistor 13 and applied to a potentiometer 14 in turn supplying a magnetic amplifier 15 which applies this current component to resistor 10. The tapping on resistor 13 is gauged to field regulator 9 so that 'the proportion of the voltage tapped off is automatically increased as the regulator 9 is moved in the direction to increase the motor speed. Potentiometer 14 is manually adjustable. In a modification, the field winding of the motor (instead of the generator) is connected in series with the exciter 6 across the bus-bars 7.
GB29613/49A 1949-11-18 1949-11-18 Improvements relating to electric motor control systems Expired GB671080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB29613/49A GB671080A (en) 1949-11-18 1949-11-18 Improvements relating to electric motor control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29613/49A GB671080A (en) 1949-11-18 1949-11-18 Improvements relating to electric motor control systems

Publications (1)

Publication Number Publication Date
GB671080A true GB671080A (en) 1952-04-30

Family

ID=10294332

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29613/49A Expired GB671080A (en) 1949-11-18 1949-11-18 Improvements relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB671080A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056710B (en) * 1953-04-02 1959-05-06 Siemens Ag Arrangement for the current limitation of a speed-controlled direct current motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056710B (en) * 1953-04-02 1959-05-06 Siemens Ag Arrangement for the current limitation of a speed-controlled direct current motor

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