JPS5635696A - Control circuit for synchronous motor - Google Patents

Control circuit for synchronous motor

Info

Publication number
JPS5635696A
JPS5635696A JP11080979A JP11080979A JPS5635696A JP S5635696 A JPS5635696 A JP S5635696A JP 11080979 A JP11080979 A JP 11080979A JP 11080979 A JP11080979 A JP 11080979A JP S5635696 A JPS5635696 A JP S5635696A
Authority
JP
Japan
Prior art keywords
timer
synchronous motor
energized
detecting relay
trip coil
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
JP11080979A
Other languages
Japanese (ja)
Inventor
Akira Kotani
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11080979A priority Critical patent/JPS5635696A/en
Publication of JPS5635696A publication Critical patent/JPS5635696A/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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To make the operation of the synchronous motor continuous even under a step-out condition within a specified time by giving step-out detecting signal and the contact signal of a field cutting device to a trip coil via an AND gate and a timer. CONSTITUTION:When an insufficient voltage detecting relay 6, an excessive current detecting relay 7, and a field disappearance detecting relay 9 are actuated; the trip coil 2a is energized through an OR gate 15. When a step-out detecting relay 14 is actuated, a memory unit 16 memorizes this, and a field cutting device 8 is tripped at the same tiem. Therefore, a contact 8a is closed, and the timer 18 is energized. If the synchronous motor does not start the synchronous operation again within the time set by the timer 18, the trip coil 2a is energized by the output of the timer 18.
JP11080979A 1979-08-29 1979-08-29 Control circuit for synchronous motor Pending JPS5635696A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11080979A JPS5635696A (en) 1979-08-29 1979-08-29 Control circuit for synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11080979A JPS5635696A (en) 1979-08-29 1979-08-29 Control circuit for synchronous motor

Publications (1)

Publication Number Publication Date
JPS5635696A true JPS5635696A (en) 1981-04-08

Family

ID=14545199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11080979A Pending JPS5635696A (en) 1979-08-29 1979-08-29 Control circuit for synchronous motor

Country Status (1)

Country Link
JP (1) JPS5635696A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028492A1 (en) * 2000-06-08 2001-12-20 Ebm Werke Gmbh & Co Kg System for controlling mains controlled a.c. synchronous motor, operates motor in asynchronous mode at reduced speed if speed deviation persists for defined period

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10028492A1 (en) * 2000-06-08 2001-12-20 Ebm Werke Gmbh & Co Kg System for controlling mains controlled a.c. synchronous motor, operates motor in asynchronous mode at reduced speed if speed deviation persists for defined period
DE10028492B4 (en) * 2000-06-08 2008-09-25 Ebm-Papst Mulfingen Gmbh & Co. Kg System for controlling a mains AC synchronous motor

Similar Documents

Publication Publication Date Title
ES8105891A1 (en) Detector device for overcurrents and the loss of one or two phases.
ES226997U (en) Circuit breaker with improved trip means having a high rating shunt trip
JPS5635696A (en) Control circuit for synchronous motor
JPS5522264A (en) Interlocking stop circuit for plural device
ES8301081A1 (en) Speed control means of an electrical motor of a washing machine.
JPS5656193A (en) Field current control device
JPS5681001A (en) Control apparatus for electric car
JPS539140A (en) Starting method of testing apparatus using computer
JPS5343309A (en) Control circuit for electric car
JPS5543320A (en) Minimum ventilating air volume compensation circuit unit
JPS5343316A (en) Operation control system for electric car
JPS5788881A (en) Control device for synchrnous motor
JPS5625031A (en) Protective device for control unit
JPS5656197A (en) Excitation control device for rotary electric machine
JPS5716592A (en) Controlling device for rotating speed of dc motor
FR2380652A1 (en) DC current overload detector and cut=out driver - has zero insertion resistance and employs reed switch as sensor
JPS547113A (en) Motor drive controller
JPS57201869A (en) Monitoring device for failure of switching equipment
JPS5422514A (en) Control device of motor which has shunt field winding
JPS5310017A (en) Field monitoring device of brushless synchronous motor
JPS56116134A (en) Battery backup device of main memory device
JPS5656199A (en) Excitation control device for rotary electric machine
JPS5690650A (en) Method and device for loop back control over pcm transmission line
JPS5257948A (en) Making control circuit of breaker
JPS56162992A (en) Controlling device for motor