JPS6423793A - Current and torque limiting circuit for ac motor driving inverter unit - Google Patents

Current and torque limiting circuit for ac motor driving inverter unit

Info

Publication number
JPS6423793A
JPS6423793A JP62177580A JP17758087A JPS6423793A JP S6423793 A JPS6423793 A JP S6423793A JP 62177580 A JP62177580 A JP 62177580A JP 17758087 A JP17758087 A JP 17758087A JP S6423793 A JPS6423793 A JP S6423793A
Authority
JP
Japan
Prior art keywords
current
signal
output
inverter unit
voltage
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.)
Granted
Application number
JP62177580A
Other languages
Japanese (ja)
Other versions
JPH0767311B2 (en
Inventor
Hiroyuki Yonezawa
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP62177580A priority Critical patent/JPH0767311B2/en
Publication of JPS6423793A publication Critical patent/JPS6423793A/en
Publication of JPH0767311B2 publication Critical patent/JPH0767311B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To improve the stability of the operation of an AC motor with an inverter, by using output voltage correction together with inverter output frequency correction in case of the fluctuation of load torque. CONSTITUTION:By a current arithmetic circuit 6, a signal difference is operated between the output signal of a current detector 3 and the set value signal of allowable current Imu, and when the detection current is made greater than the allowable current Imu, then proportional and integral arithmetic is performed from the input current signal difference, and its result is output as frequency reduction correcting signal f in an inverter unit 1. When the frequency reduction correcting signal f is continuously kept without being extinguished, then by a voltage arithmetic circuit 5, a value after the lapse of the fixed time, as voltage increment correcting signal V against the inverter unit 1, is put together with the output signal of a voltage detector 4, to generate the output.
JP62177580A 1987-07-16 1987-07-16 Current and torque limiting circuit for AC motor drive inverter device Expired - Lifetime JPH0767311B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62177580A JPH0767311B2 (en) 1987-07-16 1987-07-16 Current and torque limiting circuit for AC motor drive inverter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62177580A JPH0767311B2 (en) 1987-07-16 1987-07-16 Current and torque limiting circuit for AC motor drive inverter device

Publications (2)

Publication Number Publication Date
JPS6423793A true JPS6423793A (en) 1989-01-26
JPH0767311B2 JPH0767311B2 (en) 1995-07-19

Family

ID=16033458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62177580A Expired - Lifetime JPH0767311B2 (en) 1987-07-16 1987-07-16 Current and torque limiting circuit for AC motor drive inverter device

Country Status (1)

Country Link
JP (1) JPH0767311B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247237A (en) * 1991-09-06 1993-09-21 Mitsubishi Denki Kabushiki Kaisha Control device of induction motor
US6416615B1 (en) * 2000-08-31 2002-07-09 United Microelectronics Corp. Device for detecting abnormality in chemical-mechanical polishing operation
JP2010136559A (en) * 2008-12-05 2010-06-17 Mitsubishi Heavy Ind Ltd Method and device for controlling induction motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102485408B1 (en) * 2016-12-26 2023-01-04 엘에스일렉트릭(주) Method for controlling inverter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247237A (en) * 1991-09-06 1993-09-21 Mitsubishi Denki Kabushiki Kaisha Control device of induction motor
US6416615B1 (en) * 2000-08-31 2002-07-09 United Microelectronics Corp. Device for detecting abnormality in chemical-mechanical polishing operation
JP2010136559A (en) * 2008-12-05 2010-06-17 Mitsubishi Heavy Ind Ltd Method and device for controlling induction motor

Also Published As

Publication number Publication date
JPH0767311B2 (en) 1995-07-19

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