JPS57151290A - Driving device for induction motor - Google Patents

Driving device for induction motor

Info

Publication number
JPS57151290A
JPS57151290A JP56035013A JP3501381A JPS57151290A JP S57151290 A JPS57151290 A JP S57151290A JP 56035013 A JP56035013 A JP 56035013A JP 3501381 A JP3501381 A JP 3501381A JP S57151290 A JPS57151290 A JP S57151290A
Authority
JP
Japan
Prior art keywords
torque
speed
induction motor
motor
exciting
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
JP56035013A
Other languages
Japanese (ja)
Inventor
Yoshimoto Fujioka
Naoto Oota
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP56035013A priority Critical patent/JPS57151290A/en
Publication of JPS57151290A publication Critical patent/JPS57151290A/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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/0077—Characterised by the use of a particular software algorithm

Abstract

PURPOSE:To suppress the exciting sound of an induction motor at a light load time by providing means for generating cubic root function of speed deviation and means for outputting an amplitude signal and a 3-phase sinusoidal signal with the output of the generating means and an actual speed, thereby varying the exciting current in response to the torque. CONSTITUTION:The speed of an induction motor 101 is detected by a resolver 102, is converted to an analog value by a converter 104, and is compared by an arithmetic circuit 108 with a command value. The difference is inputted through an absolute value circuit 110 to a cubic root function generator 111, is digitized by a converter 112, is then applied to a microcomputer 113, is calculated with the actual speed, and an amplitude signal and a 3-phase sinusoidal signal are outputted. Then, a motor 101 is controlled through a pulse width modulator 123 and an inverter 124. Accordingly, the speed deviation is corrected to be regarded as correct torque, thereby varying the exciting current in response to the torque and suppressing the exciting sound of the motor at the light load time.
JP56035013A 1981-03-11 1981-03-11 Driving device for induction motor Pending JPS57151290A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56035013A JPS57151290A (en) 1981-03-11 1981-03-11 Driving device for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56035013A JPS57151290A (en) 1981-03-11 1981-03-11 Driving device for induction motor

Publications (1)

Publication Number Publication Date
JPS57151290A true JPS57151290A (en) 1982-09-18

Family

ID=12430184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56035013A Pending JPS57151290A (en) 1981-03-11 1981-03-11 Driving device for induction motor

Country Status (1)

Country Link
JP (1) JPS57151290A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001865A1 (en) * 1982-11-02 1984-05-10 Fanuc Ltd Controller for ac motor
JPS60162493A (en) * 1984-02-01 1985-08-24 Hitachi Ltd 2-phase sinusoidal signal oscillator for controlling ac motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984001865A1 (en) * 1982-11-02 1984-05-10 Fanuc Ltd Controller for ac motor
JPS60162493A (en) * 1984-02-01 1985-08-24 Hitachi Ltd 2-phase sinusoidal signal oscillator for controlling ac motor

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