JPS6434132A - Device for driving ac motor - Google Patents
Device for driving ac motorInfo
- Publication number
- JPS6434132A JPS6434132A JP62188257A JP18825787A JPS6434132A JP S6434132 A JPS6434132 A JP S6434132A JP 62188257 A JP62188257 A JP 62188257A JP 18825787 A JP18825787 A JP 18825787A JP S6434132 A JPS6434132 A JP S6434132A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- value
- converter circuit
- circuit
- predetermined value
- 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
- Inverter Devices (AREA)
- Protection Of Generators And Motors (AREA)
- Protection Of Static Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To increase the overload resistance of a converter circuit by detecting the input current of the converter circuit, turning OFF the transistor of the converter at a first predetermined value or more, and stopping a motor with a second predetermined value or more. CONSTITUTION:When a parallel circuit of a transistor and a diode energizes an AC motor 5 by a converter circuit 2 and an inverter circuit 4 provided at the sides of a bridge, the current value of the input side of the converter circuit 2 is detected by a detection circuit 14. If the detected value is larger than a first predetermined value, the transistor of the converter circuit 2 is turned OFF, and a main current is supplied to the diode. When the detected value becomes larger than a second predetermined value larger than the first value, the motor 5 is stopped. Thus, the motor 5 can be continued within a range of the energizing capacity of the diode even at the time of overload.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188257A JPH0681416B2 (en) | 1987-07-28 | 1987-07-28 | AC motor drive |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188257A JPH0681416B2 (en) | 1987-07-28 | 1987-07-28 | AC motor drive |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6434132A true JPS6434132A (en) | 1989-02-03 |
JPH0681416B2 JPH0681416B2 (en) | 1994-10-12 |
Family
ID=16220518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62188257A Expired - Fee Related JPH0681416B2 (en) | 1987-07-28 | 1987-07-28 | AC motor drive |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0681416B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05207766A (en) * | 1992-01-23 | 1993-08-13 | Mitsubishi Electric Corp | Method and device for overcurrent protection and overcurrent detector |
JP2007006606A (en) * | 2005-06-23 | 2007-01-11 | Toshiba Corp | Power converter |
JP2011092004A (en) * | 2004-10-04 | 2011-05-06 | Daikin Industries Ltd | Method for protecting pwm rectifier circuit and apparatus therefor |
-
1987
- 1987-07-28 JP JP62188257A patent/JPH0681416B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05207766A (en) * | 1992-01-23 | 1993-08-13 | Mitsubishi Electric Corp | Method and device for overcurrent protection and overcurrent detector |
JP2011092004A (en) * | 2004-10-04 | 2011-05-06 | Daikin Industries Ltd | Method for protecting pwm rectifier circuit and apparatus therefor |
JP2011092005A (en) * | 2004-10-04 | 2011-05-06 | Daikin Industries Ltd | Method for protecting pwm rectifier circuit and apparatus therefor |
JP2007006606A (en) * | 2005-06-23 | 2007-01-11 | Toshiba Corp | Power converter |
Also Published As
Publication number | Publication date |
---|---|
JPH0681416B2 (en) | 1994-10-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |