JPS5649692A - Variable voltage and variable frequency power supply - Google Patents
Variable voltage and variable frequency power supplyInfo
- Publication number
- JPS5649692A JPS5649692A JP12380479A JP12380479A JPS5649692A JP S5649692 A JPS5649692 A JP S5649692A JP 12380479 A JP12380479 A JP 12380479A JP 12380479 A JP12380479 A JP 12380479A JP S5649692 A JPS5649692 A JP S5649692A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- speed command
- limiter
- current
- command signal
- 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
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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To prevent the overcurrent of a motor at a low speed, by varying the limitting value of a limiter circuit which limits the maximum allowable current of the motor with respect to a speed command signal. CONSTITUTION:The power supply 16 is connected to the motor 4 via a rectifer 1 and an inverter 3. The signal from a voltage detector 6 is supplied to an automatic voltage regulator 8 together with a speed command signal 5, and controls the gate of the rectifier 1 via the limiter 12 and an automatic current regulator 11. The speed command signal 5 controls the gate of the inverter 3 via a ring counter 14. At this time, the speed command signal is also supplied to a current limiter regulating circuit 15, and the limiter 12 is operated by the output therefrom. Therefore, the limiting value which limits the maximum allowable current of the motor 4 can be varied by the speed command, and the flowing of the current exceeding the value of the allowable current into the motor 4 at a low speed can be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12380479A JPS5649692A (en) | 1979-09-28 | 1979-09-28 | Variable voltage and variable frequency power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12380479A JPS5649692A (en) | 1979-09-28 | 1979-09-28 | Variable voltage and variable frequency power supply |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5649692A true JPS5649692A (en) | 1981-05-06 |
Family
ID=14869723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12380479A Pending JPS5649692A (en) | 1979-09-28 | 1979-09-28 | Variable voltage and variable frequency power supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5649692A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58103887A (en) * | 1981-12-14 | 1983-06-21 | Hitachi Ltd | Overcurrent preventing circuit in motor driving circuit |
JPS6237096A (en) * | 1985-08-05 | 1987-02-18 | Fuji Electric Co Ltd | Protective device for overcurrent of inverter driving motor |
JPS6237093A (en) * | 1985-08-07 | 1987-02-18 | Hitachi Ltd | Control method of number of revolution of air conditioner |
WO1991009463A1 (en) * | 1989-12-15 | 1991-06-27 | Anritsu Corporation | Inverter-controlled apparatus for carrying and measuring articles |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54106816A (en) * | 1978-02-10 | 1979-08-22 | Toshiba Corp | Control system for ac motor |
-
1979
- 1979-09-28 JP JP12380479A patent/JPS5649692A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54106816A (en) * | 1978-02-10 | 1979-08-22 | Toshiba Corp | Control system for ac motor |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58103887A (en) * | 1981-12-14 | 1983-06-21 | Hitachi Ltd | Overcurrent preventing circuit in motor driving circuit |
JPH0452079B2 (en) * | 1981-12-14 | 1992-08-20 | Hitachi Ltd | |
JPS6237096A (en) * | 1985-08-05 | 1987-02-18 | Fuji Electric Co Ltd | Protective device for overcurrent of inverter driving motor |
JPS6237093A (en) * | 1985-08-07 | 1987-02-18 | Hitachi Ltd | Control method of number of revolution of air conditioner |
WO1991009463A1 (en) * | 1989-12-15 | 1991-06-27 | Anritsu Corporation | Inverter-controlled apparatus for carrying and measuring articles |
US5359154A (en) * | 1989-12-15 | 1994-10-25 | Anritsu Corporation | Conveyor apparatus having plural conveyors with equalized conveying speeds controlled by an inverter means |
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