JPS5631383A - Preventive device for reverse running of ac motor - Google Patents

Preventive device for reverse running of ac motor

Info

Publication number
JPS5631383A
JPS5631383A JP10726779A JP10726779A JPS5631383A JP S5631383 A JPS5631383 A JP S5631383A JP 10726779 A JP10726779 A JP 10726779A JP 10726779 A JP10726779 A JP 10726779A JP S5631383 A JPS5631383 A JP S5631383A
Authority
JP
Japan
Prior art keywords
motor
switch
reverse running
frequency converter
phase rotation
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
JP10726779A
Other languages
Japanese (ja)
Inventor
Kazunori Masuda
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.)
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Electric Manufacturing 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 Toyo Electric Manufacturing Ltd filed Critical Toyo Electric Manufacturing Ltd
Priority to JP10726779A priority Critical patent/JPS5631383A/en
Publication of JPS5631383A publication Critical patent/JPS5631383A/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
    • H02H7/097—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 wrong direction of rotation

Landscapes

  • Motor And Converter Starters (AREA)

Abstract

PURPOSE:To prevent reverse running of an AC motor by a method wherein the exclusive OR of a rotation direction detector interlocking with a small-sized motor connected to an AC motor driven by means of a variable voltage/variable frequency converter and the instruction for revolution direction is utilized. CONSTITUTION:An AC motor 22 is driven by means of a frequency converter 21, and the direction of rotation is selected by operating a phase rotation change-over circuit 20 by means of a phase rotation change-over switch 15. On the other hand, a switch 23 and a small-sized AC motor 24 are mounted between the frequency converter 21 and the motor 22, and a rotation direction detector 25 is interlocked and installed to the motor 24. The signals of the detector 25 and the signals of the phase rotation change-over switch 15 are provided to an exclusive-or circuit 26, and an exciting coil 27 of the switch 23 is operated by the output. Thereby, the switch 23 can be interrupted when the motor intends to turn in the direction different from the operation instructions due to an erroneous operation, etc. of a control circuit, and reverse running can be prevented.
JP10726779A 1979-08-24 1979-08-24 Preventive device for reverse running of ac motor Pending JPS5631383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10726779A JPS5631383A (en) 1979-08-24 1979-08-24 Preventive device for reverse running of ac motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10726779A JPS5631383A (en) 1979-08-24 1979-08-24 Preventive device for reverse running of ac motor

Publications (1)

Publication Number Publication Date
JPS5631383A true JPS5631383A (en) 1981-03-30

Family

ID=14454716

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10726779A Pending JPS5631383A (en) 1979-08-24 1979-08-24 Preventive device for reverse running of ac motor

Country Status (1)

Country Link
JP (1) JPS5631383A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172993A (en) * 1983-03-23 1984-09-29 Hitachi Ltd Reverse rotation preventing device of dc motor with position detector
EP0429867A2 (en) * 1989-10-31 1991-06-05 Mita Industrial Co. Ltd. Error detecting unit of motor rotation control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172993A (en) * 1983-03-23 1984-09-29 Hitachi Ltd Reverse rotation preventing device of dc motor with position detector
EP0429867A2 (en) * 1989-10-31 1991-06-05 Mita Industrial Co. Ltd. Error detecting unit of motor rotation control device

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