GB948914A - Improvements in or relating to rotary electric machines - Google Patents

Improvements in or relating to rotary electric machines

Info

Publication number
GB948914A
GB948914A GB3507459A GB3507459A GB948914A GB 948914 A GB948914 A GB 948914A GB 3507459 A GB3507459 A GB 3507459A GB 3507459 A GB3507459 A GB 3507459A GB 948914 A GB948914 A GB 948914A
Authority
GB
United Kingdom
Prior art keywords
windings
mode
star
pole
regulator
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
GB3507459A
Inventor
Gordon Hindle Rawcliffe
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB3507459A priority Critical patent/GB948914A/en
Priority to DE19601438064 priority patent/DE1438064B2/en
Priority to CH1161560A priority patent/CH376172A/en
Priority to BE608685A priority patent/BE608685Q/en
Publication of GB948914A publication Critical patent/GB948914A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/12—Asynchronous induction motors for multi-phase current
    • H02K17/14—Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

948,914. Change-pole electric motors; control of A.C. motors. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Sept. 29, 1960 [Oct. 16, 1959], No. 35074/59. Headings H2A and H2J. A three-phase, squirrel-cage motor having pole-changing by pole-amplitude modulation is arranged to run at intermediate speeds by differentially energizing the motor windings in the pattern appropriate for both polenumbers simultaneously, i.e. varying the applied voltages in a simultaneously opposite manner to produce the speed required. The windings may be as described in Specification 926,101 or 900,600 in which, in one mode the windings are each energized between their ends 11, 12; 11<SP>1</SP>, 121; and 11<SP>11</SP>, 12<SP>11</SP> respectively, and in the other mode between these ends joined together and through an additional winding connected to a centre-tap 13, 131, 1311. The two modes of energization are provided by a differential voltage regulator 20 which may be of various types, e.g. an induction regulator as shown. The tapping-points 14, 141, 1411 are energized directly from the regulator to give parallel-star operation. The other mode of connection, which is effectively a series star or delta connection, is achieved through a transformer 40 having primary windings 41, 42, 43 and secondary windings 51, 52; 53, 54; 55, 56 connected across the motor windings. The secondary windings are centre-tapped to star-point 60 to provide a path for the parallelstar currents of the other mode.
GB3507459A 1957-08-28 1959-10-16 Improvements in or relating to rotary electric machines Expired GB948914A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3507459A GB948914A (en) 1959-10-16 1959-10-16 Improvements in or relating to rotary electric machines
DE19601438064 DE1438064B2 (en) 1959-10-16 1960-10-12 Three-phase drive device
CH1161560A CH376172A (en) 1959-10-16 1960-10-17 Installation comprising a three-phase induction motor with variable speed continuously between two limits
BE608685A BE608685Q (en) 1957-08-28 1961-09-29 Improvements relating to rotary electrical machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3507459A GB948914A (en) 1959-10-16 1959-10-16 Improvements in or relating to rotary electric machines

Publications (1)

Publication Number Publication Date
GB948914A true GB948914A (en) 1964-02-05

Family

ID=10373484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3507459A Expired GB948914A (en) 1957-08-28 1959-10-16 Improvements in or relating to rotary electric machines

Country Status (3)

Country Link
CH (1) CH376172A (en)
DE (1) DE1438064B2 (en)
GB (1) GB948914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120874A (en) * 1982-03-31 1983-12-07 Grundfos As Circulating pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120874A (en) * 1982-03-31 1983-12-07 Grundfos As Circulating pump

Also Published As

Publication number Publication date
CH376172A (en) 1964-03-31
DE1438064B2 (en) 1970-11-26
DE1438064A1 (en) 1968-10-31

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