GB1192861A - Improvements in Variable Speed Induction Motors - Google Patents

Improvements in Variable Speed Induction Motors

Info

Publication number
GB1192861A
GB1192861A GB4193/68A GB419368A GB1192861A GB 1192861 A GB1192861 A GB 1192861A GB 4193/68 A GB4193/68 A GB 4193/68A GB 419368 A GB419368 A GB 419368A GB 1192861 A GB1192861 A GB 1192861A
Authority
GB
United Kingdom
Prior art keywords
speed
flux
rotor
speeds
reduced
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
GB4193/68A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1192861A publication Critical patent/GB1192861A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
    • H02K17/36—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with another asynchronous induction motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • 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
    • H02K17/04—Asynchronous induction motors for single phase current
    • H02K17/06—Asynchronous induction motors for single phase current having windings arranged for permitting pole-changing
    • 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
    • H02K17/22—Asynchronous induction motors having rotors with windings connected to slip-rings
    • H02K17/24—Asynchronous induction motors having rotors with windings connected to slip-rings in which both stator and rotor are fed with AC

Landscapes

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

Abstract

1,192,861. Induction motors. LICENTIA PATENT - VERWALTUNGS - G.m.b.H. 26 Jan., 1968 [27 Jan., 1967], No. 4193/68. Heading H2A. In a change-speed induction motor, especially for washing machines, the speed range of rotor 4 is increased by the use of the sum and difference of two slightly different flux speeds. The flux speed of one member could be reduced by leaving some slots unwound. But preferably the flux speed of stator 1 is slightly reduced by removing some of the stator teeth at 24, see Fig. 2, and crowding the windings into the remaining slots so that the effective pole-pitch is reduced. The rotor 4 carries a normal primary winding, and the two field systems are linked by a freerunning squirrel-cage intermediate rotor 8. Thus the two flux speeds are 2700 R.P.M. and 3000 R.P.M. respectively, giving speeds of 5700 R.P.M. and 300 R.P.M., i.e. a ratio of 1: 19. The intermediate rotor preferably has two separate squirrel-cages 9, 10 and these support the rotor by means of end shields 11 and 12 which also act as fans. The brush-gear is fully encapsulated. The motor may be of shaded-pole or capacitor type and either or both primary winding may have 2:1 polechanging to extend the speed-range. Both primary windings may be energized together in series or parallel, and either may be D.C. excited through a rectifier (Fig. 4, not shown) to produce the effective speed of one or other primary flux. The capacitor may be used for resonant self-excitation of either member, the speed being controlled by resistors.
GB4193/68A 1967-01-27 1968-01-26 Improvements in Variable Speed Induction Motors Expired GB1192861A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL0055598 1967-01-27
DE19671638349 DE1638349B1 (en) 1967-01-27 1967-01-27 SPEED SWITCHABLE INDUCTION MOTOR ESPECIALLY FOR WASHING MACHINES

Publications (1)

Publication Number Publication Date
GB1192861A true GB1192861A (en) 1970-05-20

Family

ID=25753971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4193/68A Expired GB1192861A (en) 1967-01-27 1968-01-26 Improvements in Variable Speed Induction Motors

Country Status (2)

Country Link
DE (1) DE1638349B1 (en)
GB (1) GB1192861A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163608A (en) * 1984-08-11 1986-02-26 Skf Textilmasch Komponenten Spinning or twisting element with individual drive
WO2008004266A2 (en) * 2006-07-06 2008-01-10 K4A Srl Twin variable speed asyncronous generator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006856B4 (en) * 2007-02-12 2009-05-07 Siemens Ag Electric machine with a stator, a rotor, an interrotor and a coolable housing
EP2211446A1 (en) * 2009-01-23 2010-07-28 Mikayel M. Tayegyan Asynchronous machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419431A (en) * 1947-04-22 williams
DE610161C (en) * 1931-03-20 1935-03-04 Peter A Fridkin Dipl Ing Card with electric drive
US2119205A (en) * 1936-04-18 1938-05-31 Leeds & Northrup Co Method and system of motor control
DE841019C (en) * 1949-08-20 1952-06-09 Siemens Ag Gear for adjusting tangentially adjustable poles in electrical machines, especially rotary field motors
DE909478C (en) * 1951-11-10 1954-04-22 Robert Braun Dipl Ing Multi-phase asynchronous machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163608A (en) * 1984-08-11 1986-02-26 Skf Textilmasch Komponenten Spinning or twisting element with individual drive
WO2008004266A2 (en) * 2006-07-06 2008-01-10 K4A Srl Twin variable speed asyncronous generator
WO2008004266A3 (en) * 2006-07-06 2008-02-21 Vladimiro Lidak Twin variable speed asyncronous generator

Also Published As

Publication number Publication date
DE1638349B1 (en) 1971-03-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees