GB844363A - Improvements in and relating to electric control systems for a plurality of direct current motors - Google Patents

Improvements in and relating to electric control systems for a plurality of direct current motors

Info

Publication number
GB844363A
GB844363A GB2013655A GB2013655A GB844363A GB 844363 A GB844363 A GB 844363A GB 2013655 A GB2013655 A GB 2013655A GB 2013655 A GB2013655 A GB 2013655A GB 844363 A GB844363 A GB 844363A
Authority
GB
United Kingdom
Prior art keywords
speed
motor
field
winding
load
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
GB2013655A
Inventor
Richard Hammond
Maurice Ridding
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 GB2013655A priority Critical patent/GB844363A/en
Publication of GB844363A publication Critical patent/GB844363A/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
    • H02P7/30—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 magnetic devices with controllable degree of saturation, i.e. transductors
    • H02P7/305—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 magnetic devices with controllable degree of saturation, i.e. transductors 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 Multiple Motors (AREA)

Abstract

844,363. Automatic speed-control systems. ENGLISH ELECTRIC CO. Ltd. Oct. 9, 1956 [July 12, 1955], No. 20136/55. Class 38 (4). In a system for a plurality of D.C. electric motors arranged to drive independent consecutive sections of a material treating machine, which includes for each motor a speed reference regulator, a speed signal generator, and means whereby the speed is maintained in accordance with the setting of the regulator, the regulating means is also responsive to a third electrical quantity dependent on the load in a manner such that for any given setting of the speed reference regulator the speed of the motor decreases as the load increases, and there is provided for each motor, manually controlled field-regulating means and means arranged to reduce the magnitude of the third electrical quantity for any given value of motor load as the field excitation of the motor is reduced by the manually controlled regulating means. The speed of series motor 10a is controlled in accordance with the energization of an auxiliary field winding 10d by the difference between a reference voltage applied to leads 18 and 12 and the output of tachometer generator 17. The error signal is applied to the control winding 15b of a magnetic amplifier 15 which includes a further winding 15a opposed to the control winding and energized in accordance with the armature current. Ganged potentiometers 13, 16, 19 which are set according to the desired speed adjust the main motor field to a value such as will produce the required speed, reduce the effect of the winding 15a at lower speeds, and reduce the tachometer field 17b respectively. A stabilizing feedback field is also provided. The arrangement which is stated to be useful in a steel rolling mill is said to improve the speed regulation by increasing the error signal in response to load changes. In a modified arrangement described control is effected by a booster in the armature circuit.
GB2013655A 1955-07-12 1955-07-12 Improvements in and relating to electric control systems for a plurality of direct current motors Expired GB844363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2013655A GB844363A (en) 1955-07-12 1955-07-12 Improvements in and relating to electric control systems for a plurality of direct current motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2013655A GB844363A (en) 1955-07-12 1955-07-12 Improvements in and relating to electric control systems for a plurality of direct current motors

Publications (1)

Publication Number Publication Date
GB844363A true GB844363A (en) 1960-08-10

Family

ID=10140965

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2013655A Expired GB844363A (en) 1955-07-12 1955-07-12 Improvements in and relating to electric control systems for a plurality of direct current motors

Country Status (1)

Country Link
GB (1) GB844363A (en)

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