GB495840A - Improvements in and relating to electric motor control systems - Google Patents

Improvements in and relating to electric motor control systems

Info

Publication number
GB495840A
GB495840A GB14212/37A GB1421237A GB495840A GB 495840 A GB495840 A GB 495840A GB 14212/37 A GB14212/37 A GB 14212/37A GB 1421237 A GB1421237 A GB 1421237A GB 495840 A GB495840 A GB 495840A
Authority
GB
United Kingdom
Prior art keywords
relay
field
rectifier
current
relating
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
GB14212/37A
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 GB495840A publication Critical patent/GB495840A/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
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

495,840. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. May 21, 1937, No. 14212. Convention date, May 21, 1936. [Class 38 (iii)] In a system for starting a synchronous motor 1 with its field 3 connected to a resistance 6, in which, as described in Specification 384,567, the energization of the field is effected under the control of a relay 11 energized from the resistance 6 through a rectifier 10, a condenser 16 is connected in parallel with the rectifier 10 whereby the current in the coil of the relay 11 falls to zero before the current in the field winding. Thus the operation of the field switch 9, in response to the relay 11, takes place at the most favourable point in the cycle of induced field current. The Specification as open to inspection under Sect. 91 comprises also an arrangement in which an additional rectifier is connected across the coil of the relay 11 in opposition to the rectifier 10. This subject-matter does not appear in the Specification as accepted.
GB14212/37A 1936-05-21 1937-05-21 Improvements in and relating to electric motor control systems Expired GB495840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US495840XA 1936-05-21 1936-05-21

Publications (1)

Publication Number Publication Date
GB495840A true GB495840A (en) 1938-11-21

Family

ID=21960603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14212/37A Expired GB495840A (en) 1936-05-21 1937-05-21 Improvements in and relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB495840A (en)

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