JPS6423793A - Current and torque limiting circuit for ac motor driving inverter unit - Google Patents
Current and torque limiting circuit for ac motor driving inverter unitInfo
- 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
Links
Landscapes
- 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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102485408B1 (en) * | 2016-12-26 | 2023-01-04 | 엘에스일렉트릭(주) | Method for controlling inverter |
-
1987
- 1987-07-16 JP JP62177580A patent/JPH0767311B2/en not_active Expired - Lifetime
Cited By (3)
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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