GB693680A - Control systems for asynchronous electrical machines - Google Patents

Control systems for asynchronous electrical machines

Info

Publication number
GB693680A
GB693680A GB8117/52A GB811752A GB693680A GB 693680 A GB693680 A GB 693680A GB 8117/52 A GB8117/52 A GB 8117/52A GB 811752 A GB811752 A GB 811752A GB 693680 A GB693680 A GB 693680A
Authority
GB
United Kingdom
Prior art keywords
motor
relay
input
motoring
braking
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
GB8117/52A
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont SA
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 Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Publication of GB693680A publication Critical patent/GB693680A/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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H02P3/24—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by applying dc to the motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

693,680. Automatic control systems for dynamo-electric machines. FORGES ET ATELIERS DE CONSTRUCTIONS ELECTRIQUE DE JEUMONT. March 31, 1952 [April 5, 1951], No. 8117/52. Class 38 (iv). In a control system for an asynchronous electrical machine, a reversible electric motor regulating the slip resistance is automatically controlled by a relay responsive to the power input to the machine when motoring and is automatically controlled by another relay responsive to the output of a tachometer generator during braking. In the Figure the stator of a wound-rotor asynchronous motor M is supplied during motoring from a three-phase source T through a reversing switch I and a switch G. A wattmeter associated with the motor input controls, through a two-way relay W the input to equipment A controlling a servomotor m adjusting cam-operated contacts c to vary in steps resistances R in the rotor circuit of the controlled motor. Rotor resistance is thus increased with increase of input power to reduce speed and increase motoring torque. Motoring in either direction is initiated by movement of a lever L in the appropriate direction to operate reversing switch I and energize the centre contact f2 of relay W. When braking, the stator is supplied from a D.C. source U through switch G. A tachometer generator D driven by the controlled motor then controls through a two-way relay E the input to equipment A so that servomotor m increases resistance R with increase of motor speed to control braking torque. Re-balancing of relay E upon a change in speed is effected by adjustment of resistances r by motor m simultaneously with resistances R. Braking is initiated by movement of a lever F to operate switch G, energize the centre contact a1 of relay E1 and set rheostats rl, r2, controlling the D.C. excitation of the controlled motor and the excitation of the tachometer generator in opposite senses, so that braking torque is dependent on the setting of lever F.
GB8117/52A 1951-04-05 1952-03-31 Control systems for asynchronous electrical machines Expired GB693680A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR693680X 1951-04-05

Publications (1)

Publication Number Publication Date
GB693680A true GB693680A (en) 1953-07-01

Family

ID=9042114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8117/52A Expired GB693680A (en) 1951-04-05 1952-03-31 Control systems for asynchronous electrical machines

Country Status (1)

Country Link
GB (1) GB693680A (en)

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