GB166878A - Improvements relating to the control of alternating-current electric motors - Google Patents

Improvements relating to the control of alternating-current electric motors

Info

Publication number
GB166878A
GB166878A GB10701/21A GB1070121A GB166878A GB 166878 A GB166878 A GB 166878A GB 10701/21 A GB10701/21 A GB 10701/21A GB 1070121 A GB1070121 A GB 1070121A GB 166878 A GB166878 A GB 166878A
Authority
GB
United Kingdom
Prior art keywords
current
relay
starting
coil
synchronous
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
GB10701/21A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Publication of GB166878A publication Critical patent/GB166878A/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

166,878. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Goodwin, July 19, 1920, [Convention date]. Systems for alternating-current motors only.- Synchronous motors are started on reduced voltage and automatically switched over to full voltage by a device responsive to the change in the current traversing the field circuit when synchronous speed is attained. In the arrangement shown a synchronous motor 2, at starting, takes current from an auto-transformer 5 through a switch 6 having an actuating coil energized in the lower pcsition of a relay 11. The starting follows from the temporary closure of a pushbutton 17, The relay 11 is controlled by a device 12 which has a coil 13 in series with the field magnet 3, and its exciter 14, and other opposing coils 15, 16 energized inductively by 13. The inductive energization becomes ineffective when synchronous speed is attained, and the device responds directly to the exciter current in 13. The result is to energize the coil of the relay 11, which raises its contact to cut out the starting switch magnet 7 and bring in the running switch magnet 9.
GB10701/21A 1920-07-19 1921-04-12 Improvements relating to the control of alternating-current electric motors Expired GB166878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US166878XA 1920-07-19 1920-07-19

Publications (1)

Publication Number Publication Date
GB166878A true GB166878A (en) 1921-11-03

Family

ID=21778400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10701/21A Expired GB166878A (en) 1920-07-19 1921-04-12 Improvements relating to the control of alternating-current electric motors

Country Status (1)

Country Link
GB (1) GB166878A (en)

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