JPS57160382A - Controlling device for induction machine - Google Patents

Controlling device for induction machine

Info

Publication number
JPS57160382A
JPS57160382A JP56042371A JP4237181A JPS57160382A JP S57160382 A JPS57160382 A JP S57160382A JP 56042371 A JP56042371 A JP 56042371A JP 4237181 A JP4237181 A JP 4237181A JP S57160382 A JPS57160382 A JP S57160382A
Authority
JP
Japan
Prior art keywords
torque
command signal
induction machine
generated
zero
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
JP56042371A
Other languages
Japanese (ja)
Inventor
Hiroshi Nagase
Toshiaki Okuyama
Yuzuru Kubota
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56042371A priority Critical patent/JPS57160382A/en
Publication of JPS57160382A publication Critical patent/JPS57160382A/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
    • 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
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/01—Asynchronous machines

Abstract

PURPOSE:To prevent torque fluctuation by attaining slide frequency after a certain length of time, setting the slide frequency zero when bringing an induction machine driven by an inverter from coasting to accelerating and decelerating rotation modes. CONSTITUTION:When driving an induction machine 4 by an inverter 3, a torque command signal corresponding to the difference of signals from a speed command device 6 and a speed detector 5 is generated from a controlling circuit 7, and at the same time, the primary current command signal is generated by a function generator 9 and the primary frequency command signal is generated by an adder 13. When an operation command 18 is given, a control circuit 19 activates a limiter 8 forbidding the torque command signal making slide frequency zero and outputs a preset torque command signal after a certain length of time. Therefore, the torque rises smoothly from zero preventing excessive fluctuation of torque when generating torque again during coasting of the induction machine 4.
JP56042371A 1981-03-25 1981-03-25 Controlling device for induction machine Pending JPS57160382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042371A JPS57160382A (en) 1981-03-25 1981-03-25 Controlling device for induction machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042371A JPS57160382A (en) 1981-03-25 1981-03-25 Controlling device for induction machine

Publications (1)

Publication Number Publication Date
JPS57160382A true JPS57160382A (en) 1982-10-02

Family

ID=12634179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042371A Pending JPS57160382A (en) 1981-03-25 1981-03-25 Controlling device for induction machine

Country Status (1)

Country Link
JP (1) JPS57160382A (en)

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