JPS56121394A - Control system of induction motor - Google Patents

Control system of induction motor

Info

Publication number
JPS56121394A
JPS56121394A JP2502580A JP2502580A JPS56121394A JP S56121394 A JPS56121394 A JP S56121394A JP 2502580 A JP2502580 A JP 2502580A JP 2502580 A JP2502580 A JP 2502580A JP S56121394 A JPS56121394 A JP S56121394A
Authority
JP
Japan
Prior art keywords
operational amplifier
resistor
induction motor
variable
rotations
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
JP2502580A
Other languages
Japanese (ja)
Inventor
Sen Tawara
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 JP2502580A priority Critical patent/JPS56121394A/en
Publication of JPS56121394A publication Critical patent/JPS56121394A/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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Landscapes

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

Abstract

PURPOSE:To start the motor without slipping the same by a method wherein an increase rate of an oscillation frequency of a variable voltage-variable frequency inverter to time is set beforehand, and the oscillation frequency is adapted not to exceed the setpoint. CONSTITUTION:The frequencies of a number of the rotations of the induction motor 6 which are detected by a speed generator are applied to an operational amplifier 24 through a resistor 36, an operational amplifier 25 and a resistor 38. When the slips take place in the induction generator 6, a switch 44 is closed and an output of an operational amplifier 23 is applied to an operational amplifier 22 through an amplifier 26, the switch 44 and a resistor 31. The operational amplifier 22 integrates the outputs of the operational amplifier 26 and adds them to a voltage of a power source 28 and after that, feeds them out to a higher orfer preference circuit 34. The higher order preference circuit 34 feeds the output of the operational amplifier 24 to the variable voltage-variable frequency inverter oscillator 10, controls the frequencies of the inverter 5 and controls the number of the rotations of the induction motor 6.
JP2502580A 1980-02-28 1980-02-28 Control system of induction motor Pending JPS56121394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2502580A JPS56121394A (en) 1980-02-28 1980-02-28 Control system of induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2502580A JPS56121394A (en) 1980-02-28 1980-02-28 Control system of induction motor

Publications (1)

Publication Number Publication Date
JPS56121394A true JPS56121394A (en) 1981-09-24

Family

ID=12154364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2502580A Pending JPS56121394A (en) 1980-02-28 1980-02-28 Control system of induction motor

Country Status (1)

Country Link
JP (1) JPS56121394A (en)

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