GB861955A - Improvements in or relating to adjustable speed alternating current electric motor drives - Google Patents

Improvements in or relating to adjustable speed alternating current electric motor drives

Info

Publication number
GB861955A
GB861955A GB12382/59A GB1238259A GB861955A GB 861955 A GB861955 A GB 861955A GB 12382/59 A GB12382/59 A GB 12382/59A GB 1238259 A GB1238259 A GB 1238259A GB 861955 A GB861955 A GB 861955A
Authority
GB
United Kingdom
Prior art keywords
motor
current
slip
rectifier
rotor windings
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
GB12382/59A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB861955A publication Critical patent/GB861955A/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
    • H02K17/40—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with a rotary AC/DC converter

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)

Abstract

861,955. Control of motors. WESTINGHOUSE ELECTRIC CORPORATION. April 13, 1959 [April 15, 1958], No. 12382/59. Class 38 (3). [Also in Group XXXV] An adjustable-speed motor comprises an A.C. induction motor 35 and a D.C. motor 33, both mounted on hollow shaft 34, motor 33 being fed through a rectifier 52 with current at the slip voltage from the A.C. rotor windings and converting this slip power to mechanical power to give a constant horse-power output. The rotor windings 41 of motor 35 are connected by leads 48 passing through shaft 34 to slip-rings 46. The current passes, via brushes 50, to semi-conductor, three-phase, full-wave rectifiers 52, the rectifiers being mounted externally to the motor. The direct current from the rectifier is fed to the armature winding 43 of motor 33 through commutator 44. The field winding 39 of motor 33 is excited by rectified current from full-wave rectifier 58, rheostat 59 giving speed control. Weakening of the D.C. motor field current results in decreased back E.M.F. and allows more current to flow in both rotor windings, producing more torque in both motors. In a modification the rectifier of the slip-voltage is mounted on the hollow shaft and rotates with it.
GB12382/59A 1958-04-15 1959-04-13 Improvements in or relating to adjustable speed alternating current electric motor drives Expired GB861955A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US861955XA 1958-04-15 1958-04-15

Publications (1)

Publication Number Publication Date
GB861955A true GB861955A (en) 1961-03-01

Family

ID=22196922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12382/59A Expired GB861955A (en) 1958-04-15 1959-04-13 Improvements in or relating to adjustable speed alternating current electric motor drives

Country Status (1)

Country Link
GB (1) GB861955A (en)

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