JPS5638985A - Controller for three-phase induction motor - Google Patents

Controller for three-phase induction motor

Info

Publication number
JPS5638985A
JPS5638985A JP11392579A JP11392579A JPS5638985A JP S5638985 A JPS5638985 A JP S5638985A JP 11392579 A JP11392579 A JP 11392579A JP 11392579 A JP11392579 A JP 11392579A JP S5638985 A JPS5638985 A JP S5638985A
Authority
JP
Japan
Prior art keywords
triode
phase
braking
turned
switch
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.)
Pending
Application number
JP11392579A
Other languages
Japanese (ja)
Inventor
Susumu Noya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11392579A priority Critical patent/JPS5638985A/en
Publication of JPS5638985A publication Critical patent/JPS5638985A/en
Pending 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)
  • Control Of Ac Motors In General (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To dispense with a braking thyristor, by controlling to an open state only a combination of gate cut-off photocouplers which are provided in the gate circuits of triode AC switches for controlling the primary voltage of the three-phase induction motor and through which a direct current can be caused to flow. CONSTITUTION:In phase constriction and in braking, photocouplers 9R2, 9S1, 9S2, 9T1 are turned on to cut off the gates of triode AC switches. In driving and in braking, other photocouplers 9R1, 9T2 are turned off by a transistor 12 controlled by a braking controller 8, not to cut off the gates of triode AC switches. For that reasons, the triode AC switch 2R is turned on through a trigger diode 3R only in a direction from a power source toward a load. The other triode AC switch 2T is turned on through a trigger diode 3T only in a direction from the load toward the power source. As a result, a braking direct current flows through the phase R of the power source, the triode AC switch 2R, the phase U of the three-phase induction motor 1, its other phase W, the other triode AC switch 2T and the other phase T of the power source in that order to perform DC braking.
JP11392579A 1979-09-05 1979-09-05 Controller for three-phase induction motor Pending JPS5638985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11392579A JPS5638985A (en) 1979-09-05 1979-09-05 Controller for three-phase induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11392579A JPS5638985A (en) 1979-09-05 1979-09-05 Controller for three-phase induction motor

Publications (1)

Publication Number Publication Date
JPS5638985A true JPS5638985A (en) 1981-04-14

Family

ID=14624621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11392579A Pending JPS5638985A (en) 1979-09-05 1979-09-05 Controller for three-phase induction motor

Country Status (1)

Country Link
JP (1) JPS5638985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225887A (en) * 1985-07-24 1987-02-03 Oriental Motor Kk Driving circuit for three-phase motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225887A (en) * 1985-07-24 1987-02-03 Oriental Motor Kk Driving circuit for three-phase motor

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