JPS5629481A - Dynamic braking device for induction motor - Google Patents

Dynamic braking device for induction motor

Info

Publication number
JPS5629481A
JPS5629481A JP10368679A JP10368679A JPS5629481A JP S5629481 A JPS5629481 A JP S5629481A JP 10368679 A JP10368679 A JP 10368679A JP 10368679 A JP10368679 A JP 10368679A JP S5629481 A JPS5629481 A JP S5629481A
Authority
JP
Japan
Prior art keywords
diode
failure
braking
thyristor
display
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
JP10368679A
Other languages
Japanese (ja)
Inventor
Michio Nakajima
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 JP10368679A priority Critical patent/JPS5629481A/en
Publication of JPS5629481A publication Critical patent/JPS5629481A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors

Landscapes

  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To exactly detect the defect of a semiconductor element and to enhance the reliability thereof by inserting a conduction display element to DC braking semiconductor elements for receiving reverse bias from the secondary windings of transformers corresponding to the respective DC braking semiconductor elements. CONSTITUTION:When a thyristor 10 is destructed at the time of operating or stopping, an opened electromagnetic contactor 9 for DC braking of the induction motor, an electric current flows during half wave when a diode 17 is forwardly biased through the secondary winding 15-2 of a transformer 15 to allow a light emitting diode 18 to be fired so as to display a failure of the thyristor 10. When a diode 14 is destructed, a light emitting diode 22 is energized during a half wave when a diode 21 is forwardly biased through the secondary winding 15-3 of the transformer 15 to display the failure of the diode 14. Since a normally open contact 9-4 is opened at the time of braking the motor while the contactor 9 is closed, the failure of the thyristor 10 is not indicated, but the failure of the diode 14 is executed as above.
JP10368679A 1979-08-15 1979-08-15 Dynamic braking device for induction motor Pending JPS5629481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10368679A JPS5629481A (en) 1979-08-15 1979-08-15 Dynamic braking device for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10368679A JPS5629481A (en) 1979-08-15 1979-08-15 Dynamic braking device for induction motor

Publications (1)

Publication Number Publication Date
JPS5629481A true JPS5629481A (en) 1981-03-24

Family

ID=14360653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10368679A Pending JPS5629481A (en) 1979-08-15 1979-08-15 Dynamic braking device for induction motor

Country Status (1)

Country Link
JP (1) JPS5629481A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6270916A (en) * 1985-09-24 1987-04-01 Kubota Ltd Boundary detecting method for self-traveling truck
JPS63225808A (en) * 1987-09-09 1988-09-20 Kubota Ltd Boundary detection for automatic running working vehicle
JPS6434202A (en) * 1987-07-30 1989-02-03 Kubota Ltd Working wagon of automatic conduct type

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6270916A (en) * 1985-09-24 1987-04-01 Kubota Ltd Boundary detecting method for self-traveling truck
JPH0436405B2 (en) * 1985-09-24 1992-06-16 Kubota Kk
JPS6434202A (en) * 1987-07-30 1989-02-03 Kubota Ltd Working wagon of automatic conduct type
JPS63225808A (en) * 1987-09-09 1988-09-20 Kubota Ltd Boundary detection for automatic running working vehicle
JPH0437443B2 (en) * 1987-09-09 1992-06-19 Kubota Kk

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