GB518287A - Improvements in and relating to electric motor control systems - Google Patents

Improvements in and relating to electric motor control systems

Info

Publication number
GB518287A
GB518287A GB24561/38A GB2456138A GB518287A GB 518287 A GB518287 A GB 518287A GB 24561/38 A GB24561/38 A GB 24561/38A GB 2456138 A GB2456138 A GB 2456138A GB 518287 A GB518287 A GB 518287A
Authority
GB
United Kingdom
Prior art keywords
field
relay
winding
motor
supply
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
GB24561/38A
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
Publication of GB518287A publication Critical patent/GB518287A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

518,287. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 20, 1938, No. 24561. Convention date, Aug. 20, 1937. [Class 38 (iii)] The field structure of a synchronous motor is provided with an auxiliary single-phase winding, displaced with relation to the main field winding, to supply slip frequency current to a time-delayed relay which controls the connection of the field winding to its source of excitation. Upon closure of a switch 4 the motor 1 is connected to the supply with its field winding 6 connected in a closed circuit with a resistance 9. A relay 21 is operated and after a time interval closes its contacts 2C in the circuit of the coil of a switch E controlling the connection of the motor field to the D.C. supply 7. The circuit is not completed however until a relay 18 provided with a delay mechanism and fed through a rectifier 16 with slip frequency closes its contacts 19. The relay 18 is fed not from the field winding 6 but by an additional winding 13 mounted on the motor field structure in a position displaced from the field 6. Specification 384,567 is referred to.
GB24561/38A 1937-08-20 1938-08-20 Improvements in and relating to electric motor control systems Expired GB518287A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US518287XA 1937-08-20 1937-08-20

Publications (1)

Publication Number Publication Date
GB518287A true GB518287A (en) 1940-02-22

Family

ID=21973607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24561/38A Expired GB518287A (en) 1937-08-20 1938-08-20 Improvements in and relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB518287A (en)

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