JPS5683278A - Detecting method for field closing rotational frequency of synchronous motor - Google Patents

Detecting method for field closing rotational frequency of synchronous motor

Info

Publication number
JPS5683278A
JPS5683278A JP15995979A JP15995979A JPS5683278A JP S5683278 A JPS5683278 A JP S5683278A JP 15995979 A JP15995979 A JP 15995979A JP 15995979 A JP15995979 A JP 15995979A JP S5683278 A JPS5683278 A JP S5683278A
Authority
JP
Japan
Prior art keywords
synchronous motor
frequency
rotational frequency
field closing
detecting method
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
JP15995979A
Other languages
Japanese (ja)
Inventor
Yukitoshi Kato
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 JP15995979A priority Critical patent/JPS5683278A/en
Publication of JPS5683278A publication Critical patent/JPS5683278A/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
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
    • H02P1/50—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by changing over from asynchronous to synchronous operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)

Abstract

PURPOSE:To obtain a field closing for a brushless exciting type synchronous motor at a given rotational frequency by detecting field closing rotational frequency through fluctuation in frequency of an armature input. CONSTITUTION:A fluctuating frequency of a primary input at starting of a synchronous motor is 2sfHz (s: slip, f: power source frequency). Since slip s changes from 1 to 0, it changes near to 120Hz at the time of commencing start and to 0Hz at the time of closing start at a 60Hz power. A rotational frequency can be detected by observing said change, therefore a field closing is obtainable for the brushless exciting type synchronous motor at a given rotational frequncy.
JP15995979A 1979-12-10 1979-12-10 Detecting method for field closing rotational frequency of synchronous motor Pending JPS5683278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15995979A JPS5683278A (en) 1979-12-10 1979-12-10 Detecting method for field closing rotational frequency of synchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15995979A JPS5683278A (en) 1979-12-10 1979-12-10 Detecting method for field closing rotational frequency of synchronous motor

Publications (1)

Publication Number Publication Date
JPS5683278A true JPS5683278A (en) 1981-07-07

Family

ID=15704899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15995979A Pending JPS5683278A (en) 1979-12-10 1979-12-10 Detecting method for field closing rotational frequency of synchronous motor

Country Status (1)

Country Link
JP (1) JPS5683278A (en)

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