GB466349A - Improvements in and relating to the speed control of dynamo electric machines - Google Patents

Improvements in and relating to the speed control of dynamo electric machines

Info

Publication number
GB466349A
GB466349A GB2916435A GB2916435A GB466349A GB 466349 A GB466349 A GB 466349A GB 2916435 A GB2916435 A GB 2916435A GB 2916435 A GB2916435 A GB 2916435A GB 466349 A GB466349 A GB 466349A
Authority
GB
United Kingdom
Prior art keywords
relay
circuit
relating
speed control
electric machines
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
GB2916435A
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.)
British Thomson Houston Co Ltd
Original Assignee
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2916435A priority Critical patent/GB466349A/en
Publication of GB466349A publication Critical patent/GB466349A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed

Landscapes

  • Control Of Direct Current Motors (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

466,349. Automatic control systems. BRITISH THOMSON-HOUSTON CO., Ltd., and GIVEN, R. D. Oct. 22, 1935, No. 29164. [Class 38 (iv)] Speed.-A dynamo-electric machine M is coupled to an alternator A connected in a circuit resonant at a predetermined frequency and including a solenoid relay R operative between definite points on the steep part of the resonance current curve corresponding to speeds below the resonance point. The relay actuates mechanism controlling an electrical element of the machine, such as a reversible motor K adjusting a resistance in an auxiliary field circuit or the brush shifting mechanism of an A.C. commutator motor. A centrifugal switch S may short-circuit contacts operated by the relay to cause a speed reducing action at all speeds above the response zone of the relay. Specification 444,269 is referred to.
GB2916435A 1935-10-22 1935-10-22 Improvements in and relating to the speed control of dynamo electric machines Expired GB466349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2916435A GB466349A (en) 1935-10-22 1935-10-22 Improvements in and relating to the speed control of dynamo electric machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2916435A GB466349A (en) 1935-10-22 1935-10-22 Improvements in and relating to the speed control of dynamo electric machines

Publications (1)

Publication Number Publication Date
GB466349A true GB466349A (en) 1937-05-24

Family

ID=10287142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2916435A Expired GB466349A (en) 1935-10-22 1935-10-22 Improvements in and relating to the speed control of dynamo electric machines

Country Status (1)

Country Link
GB (1) GB466349A (en)

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