JPS5563582A - Protective device for electric motor - Google Patents

Protective device for electric motor

Info

Publication number
JPS5563582A
JPS5563582A JP13630978A JP13630978A JPS5563582A JP S5563582 A JPS5563582 A JP S5563582A JP 13630978 A JP13630978 A JP 13630978A JP 13630978 A JP13630978 A JP 13630978A JP S5563582 A JPS5563582 A JP S5563582A
Authority
JP
Japan
Prior art keywords
electric motor
value
temperature
temperature detector
signal
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
JP13630978A
Other languages
Japanese (ja)
Inventor
Takeshi Kono
Kazuo Takazawa
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 Engineering Corp
Toshiba Corp
Original Assignee
Toshiba Engineering Corp
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 Engineering Corp, Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Engineering Corp
Priority to JP13630978A priority Critical patent/JPS5563582A/en
Publication of JPS5563582A publication Critical patent/JPS5563582A/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
    • H02H7/085—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 against excessive load
    • H02H7/0852—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 against excessive load directly responsive to abnormal temperature by using a temperature sensor

Landscapes

  • Motor And Converter Starters (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To prevent an electric motor's winding from burning, in the case of starting the electric motor from its tolerable upper limit temperature value, by using signal of a temperature detector, which was set to a value reduced from a temperature detector, which was set to a value reduced from a temperature rising value to be determined in accordance with the laod, as a start locking signal and also as an operation stopping condition. CONSTITUTION:When an electric motor is restarted from its temperature rising limit value, a temperature detector which was set to a value after subtraction of the value of temperature rising due to characteristics of load side connected directly to the electric motor, is attached to the inside of this electric motor, and a motion signal T of this temperature detector is put into a start condition circuit H of the starting circuit of the electric motor or a stopping condition circuit K. By doing this, restarting of the electric motor can be operated safely, and possible burning of the electric motor's winding due to an operator's failure in monitoring of cooling time can be prevented.
JP13630978A 1978-11-07 1978-11-07 Protective device for electric motor Pending JPS5563582A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13630978A JPS5563582A (en) 1978-11-07 1978-11-07 Protective device for electric motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13630978A JPS5563582A (en) 1978-11-07 1978-11-07 Protective device for electric motor

Publications (1)

Publication Number Publication Date
JPS5563582A true JPS5563582A (en) 1980-05-13

Family

ID=15172175

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13630978A Pending JPS5563582A (en) 1978-11-07 1978-11-07 Protective device for electric motor

Country Status (1)

Country Link
JP (1) JPS5563582A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223482A (en) * 1984-04-19 1985-11-07 Toray Eng Co Ltd Overheat protecting method of motor for driving rotary body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223482A (en) * 1984-04-19 1985-11-07 Toray Eng Co Ltd Overheat protecting method of motor for driving rotary body

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