JPS5529276A - Power supply for driving ac motor - Google Patents
Power supply for driving ac motorInfo
- Publication number
- JPS5529276A JPS5529276A JP10228578A JP10228578A JPS5529276A JP S5529276 A JPS5529276 A JP S5529276A JP 10228578 A JP10228578 A JP 10228578A JP 10228578 A JP10228578 A JP 10228578A JP S5529276 A JPS5529276 A JP S5529276A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- frequency
- motor
- time
- power factor
- 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
Links
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Electrical Variables (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE: To prevent a semiconductor element from damaging due to failure of commutation in a power supply for driving an AC motor by switching frequency and power factor improving capacitors of an inverter at its frequency switching time when the inverter is temporarily stopped or the like.
CONSTITUTION: When a rated frequency is f0, an inverter 14 is operated by setting its starting frequency at f0/3. When a comparator circuit 17 detects the substantial coincidence of the output signal A from a revolution detector 16 mounted as one representative of a motor 10 to the output frequency signal B from the inverter, it generates its output detection signal C to thereby stop the inverter 14 at time t1. In the meanwhile, the set frequency of the control circuit 18 for the inverter 14 is switched to next stage (2/3f0), and a power factor improving capacitor 15 is switched to set the power factor at 0.9∼1.0 at this frequency. The inverter 14 is again operated at time t2 when this operation is finished to gradually raise the voltage. Since the time duration between the times t1 and t2 is approx. 1 second, a motor having large inertia does not almost decelerate at its rotation. Thus, it can prevent abnormal occurrence at frequency switching time at the inverter.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10228578A JPS5529276A (en) | 1978-08-24 | 1978-08-24 | Power supply for driving ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10228578A JPS5529276A (en) | 1978-08-24 | 1978-08-24 | Power supply for driving ac motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5529276A true JPS5529276A (en) | 1980-03-01 |
Family
ID=14323329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10228578A Pending JPS5529276A (en) | 1978-08-24 | 1978-08-24 | Power supply for driving ac motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5529276A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5819165A (en) * | 1981-07-23 | 1983-02-04 | Toshiba Corp | Reactive power control type cycloconverter |
| JPS59128195A (en) * | 1983-01-10 | 1984-07-24 | 株式会社日立製作所 | Controller for operation of electric hoist |
| JPS59203097A (en) * | 1983-05-04 | 1984-11-17 | ダイヤ機械株式会社 | Control system of crane winch |
| JPS603729A (en) * | 1983-06-21 | 1985-01-10 | Mitsubishi Electric Corp | Reactive power controller |
| EP0467119A1 (en) * | 1990-07-06 | 1992-01-22 | Kao Corporation | Electrically conductive paste and coating |
| US5158708A (en) * | 1989-12-01 | 1992-10-27 | Kao Corporation | Conductive paste and conductive coating film |
| US5195238A (en) * | 1990-07-20 | 1993-03-23 | Nippon Cmk Corp. | Method of manufacturing a printed circuit board |
| JP2017011873A (en) * | 2015-06-22 | 2017-01-12 | 東芝三菱電機産業システム株式会社 | Drive device for hysteresis motor |
-
1978
- 1978-08-24 JP JP10228578A patent/JPS5529276A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5819165A (en) * | 1981-07-23 | 1983-02-04 | Toshiba Corp | Reactive power control type cycloconverter |
| JPH0221217B2 (en) * | 1981-07-23 | 1990-05-14 | Tokyo Shibaura Electric Co | |
| JPS59128195A (en) * | 1983-01-10 | 1984-07-24 | 株式会社日立製作所 | Controller for operation of electric hoist |
| JPS6341838B2 (en) * | 1983-01-10 | 1988-08-18 | Hitachi Ltd | |
| JPS59203097A (en) * | 1983-05-04 | 1984-11-17 | ダイヤ機械株式会社 | Control system of crane winch |
| JPS603729A (en) * | 1983-06-21 | 1985-01-10 | Mitsubishi Electric Corp | Reactive power controller |
| JPH0412485B2 (en) * | 1983-06-21 | 1992-03-04 | Mitsubishi Electric Corp | |
| US5158708A (en) * | 1989-12-01 | 1992-10-27 | Kao Corporation | Conductive paste and conductive coating film |
| EP0467119A1 (en) * | 1990-07-06 | 1992-01-22 | Kao Corporation | Electrically conductive paste and coating |
| US5209873A (en) * | 1990-07-06 | 1993-05-11 | Kao Corporation | Electrically conductive paste and coating |
| US5195238A (en) * | 1990-07-20 | 1993-03-23 | Nippon Cmk Corp. | Method of manufacturing a printed circuit board |
| JP2017011873A (en) * | 2015-06-22 | 2017-01-12 | 東芝三菱電機産業システム株式会社 | Drive device for hysteresis motor |
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