GB572971A - Improvements in or relating to direct current motor control systems - Google Patents

Improvements in or relating to direct current motor control systems

Info

Publication number
GB572971A
GB572971A GB15294/43A GB1529443A GB572971A GB 572971 A GB572971 A GB 572971A GB 15294/43 A GB15294/43 A GB 15294/43A GB 1529443 A GB1529443 A GB 1529443A GB 572971 A GB572971 A GB 572971A
Authority
GB
United Kingdom
Prior art keywords
valve
speed
switch
condensers
motors
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
GB15294/43A
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.)
JOHN MELVIN BEDFORD
Cutler Hammer Europe Ltd
Original Assignee
JOHN MELVIN BEDFORD
Igranic 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 JOHN MELVIN BEDFORD, Igranic Electric Co Ltd filed Critical JOHN MELVIN BEDFORD
Priority to GB15294/43A priority Critical patent/GB572971A/en
Publication of GB572971A publication Critical patent/GB572971A/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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/48—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing mechanical values representing the speeds
    • H02P5/485—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing mechanical values representing the speeds using differential movement of the two motors, e.g. using differential gearboxes

Landscapes

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

Abstract

572,971. Automatic control systems for D.C. motors. IGRANIC ELECTRIC CO., Ltd., MAYNARD, S. P., and BEDFORD, J. M. Sept. 17, 1943, No. 15294. [Class 38 (iv)] Speed.-To match the speed of a direct current motor with another, a switch controlling a resistance in its shunt field circuit has its duration of opening and closing controlled respectively by electronic valves T1 and T2, the ignition instants of which are determined by the charging of condensers m, n. The charging times of these condensers are simultaneously variable in opposite senses by means (not shown) responsive to the difference in speed of the motors, for example by a jockey roller responsive to the tension in, or the length of a loop of, material which is being operated on by the motors. The charging circuits comprise respectively resistances a, b-e and f, l-g and the condensers or the resistances b-e, l-g may be controlled by the speed difference. The valve circuits are arranged as shown so that each valve is non-conducting until the potential across the condenser in its grid circuit has risen to a predetermined value. When valve T1 conducts, the switch 1b shortcircuits the resistance p-q in the field circuit of the controlled motor SM. A switch 1a is also closed so that a relay 2 energizes as soon as valve T2 conducts and a switch 2a opens to restore the circuits to their initial condition.
GB15294/43A 1943-09-17 1943-09-17 Improvements in or relating to direct current motor control systems Expired GB572971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15294/43A GB572971A (en) 1943-09-17 1943-09-17 Improvements in or relating to direct current motor control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15294/43A GB572971A (en) 1943-09-17 1943-09-17 Improvements in or relating to direct current motor control systems

Publications (1)

Publication Number Publication Date
GB572971A true GB572971A (en) 1945-10-31

Family

ID=10056514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15294/43A Expired GB572971A (en) 1943-09-17 1943-09-17 Improvements in or relating to direct current motor control systems

Country Status (1)

Country Link
GB (1) GB572971A (en)

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