GB158373A - Improvements relating to alternating-current electric motors - Google Patents

Improvements relating to alternating-current electric motors

Info

Publication number
GB158373A
GB158373A GB2722219A GB2722219A GB158373A GB 158373 A GB158373 A GB 158373A GB 2722219 A GB2722219 A GB 2722219A GB 2722219 A GB2722219 A GB 2722219A GB 158373 A GB158373 A GB 158373A
Authority
GB
United Kingdom
Prior art keywords
windings
starting
alternating
phase
motor
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
GB2722219A
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
Priority to GB2722219A priority Critical patent/GB158373A/en
Publication of GB158373A publication Critical patent/GB158373A/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)
  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

158,373. Ayres, W. E. M., and Metropolitan-Vickers Electrical Co., Ltd. Nov. 5, 1919. Alternating-current motors; exciting. - In an alternating-current motor which is started as an induction motor and is run as a synchronous motor, the secondary member is provided with a comparatively large number of conductors arranged as a number of similar windings, a starting-resistance being connected to a portion only of the windings or to the windings in parallel at starting, and a source of direct current being connected to the windings in series during synchronous operation. In the arrangement shown in Fig. 1, the rotor is provided with two independent star-connected three-phase windings 10, 11. For starting, the winding 10 is connected across the starting resistance 4, the winding 11 and the exciter 5 being open-circuited. When the motor is nearly up to its synchronous speed, the changeover switch 6 is operated to disconnect the starting-resistance 4 and connect the windings 10, 11 in series with the exciter 5, as shown in Fig. 6. Other arrangements are described in which the rotor is provided with delta-connected two-phase, three-phase and six-phase windings.
GB2722219A 1919-11-05 1919-11-05 Improvements relating to alternating-current electric motors Expired GB158373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2722219A GB158373A (en) 1919-11-05 1919-11-05 Improvements relating to alternating-current electric motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2722219A GB158373A (en) 1919-11-05 1919-11-05 Improvements relating to alternating-current electric motors

Publications (1)

Publication Number Publication Date
GB158373A true GB158373A (en) 1921-02-07

Family

ID=10256116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2722219A Expired GB158373A (en) 1919-11-05 1919-11-05 Improvements relating to alternating-current electric motors

Country Status (1)

Country Link
GB (1) GB158373A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288675B (en) * 1966-03-31 1969-02-06 Siemens Ag Converter cascade for low-loss speed regulation or control of three-phase asynchronous motors with slip ring rotors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288675B (en) * 1966-03-31 1969-02-06 Siemens Ag Converter cascade for low-loss speed regulation or control of three-phase asynchronous motors with slip ring rotors

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