GB535732A - Improvements relating to the control of electrically operated winding or like mechanisms - Google Patents

Improvements relating to the control of electrically operated winding or like mechanisms

Info

Publication number
GB535732A
GB535732A GB2387839A GB2387839A GB535732A GB 535732 A GB535732 A GB 535732A GB 2387839 A GB2387839 A GB 2387839A GB 2387839 A GB2387839 A GB 2387839A GB 535732 A GB535732 A GB 535732A
Authority
GB
United Kingdom
Prior art keywords
motor
exciter
driven
supplied
supplying
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
GB2387839A
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.)
HUGH WILLIAM CONWAY LIDDIARD
British Thomson Houston Co Ltd
Original Assignee
HUGH WILLIAM CONWAY LIDDIARD
British Thomson Houston 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 HUGH WILLIAM CONWAY LIDDIARD, British Thomson Houston Co Ltd filed Critical HUGH WILLIAM CONWAY LIDDIARD
Priority to GB2387839A priority Critical patent/GB535732A/en
Publication of GB535732A publication Critical patent/GB535732A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/23—Circuits for controlling the lowering of the load
    • B66C13/26—Circuits for controlling the lowering of the load by ac motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/081—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists with ac motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

535,732. Non-regenerative braking of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd., LIDDIARD, H. W. C., and HARTSHORN, J. S. Aug. 18, 1939, Nos. 23878/39, 27210/39 and 19/40. [Class 38 (iii)] A motor M operating winding mechanism is braked by disconnecting it from the supply and feeding its primary winding with direct current from two seriesconnected exciters E1, E2, the former supplying a constant voltage determined by a regulator R2, and the latter, driven by the motor, supplying a voltage varying in accordance with motor speed. In a modification the motor is fed from an exciter having two field windings fed respectively from the exciters E1, E2, a reversing contactor or a rectifier circuit preventing reversal of the field supplied from the exciter driven by the motor. In a further modification an exciter supplying the motor has three field windings, one supplied from a constant voltage source, a second in series with the feed to the motor, and a third supplied from an exciter driven by the motor. The secondary resistance is controlled in steps and additional resistances in the output circuit of the exciter driven by the motor are varied simultaneously with the secondary resistance. Specification 518,476 is referred to.
GB2387839A 1939-08-18 1939-08-18 Improvements relating to the control of electrically operated winding or like mechanisms Expired GB535732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2387839A GB535732A (en) 1939-08-18 1939-08-18 Improvements relating to the control of electrically operated winding or like mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2387839A GB535732A (en) 1939-08-18 1939-08-18 Improvements relating to the control of electrically operated winding or like mechanisms

Publications (1)

Publication Number Publication Date
GB535732A true GB535732A (en) 1941-04-21

Family

ID=10202776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2387839A Expired GB535732A (en) 1939-08-18 1939-08-18 Improvements relating to the control of electrically operated winding or like mechanisms

Country Status (1)

Country Link
GB (1) GB535732A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441271A (en) * 1945-12-01 1948-05-11 Cutler Hammer Inc Variable voltage system of motor control
US2503718A (en) * 1947-03-11 1950-04-11 Gen Electric Co Ltd Alternating-current electric motor equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441271A (en) * 1945-12-01 1948-05-11 Cutler Hammer Inc Variable voltage system of motor control
US2503718A (en) * 1947-03-11 1950-04-11 Gen Electric Co Ltd Alternating-current electric motor equipment

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