JPS5553188A - Power supply for driving ac motor - Google Patents
Power supply for driving ac motorInfo
- Publication number
- JPS5553188A JPS5553188A JP12552078A JP12552078A JPS5553188A JP S5553188 A JPS5553188 A JP S5553188A JP 12552078 A JP12552078 A JP 12552078A JP 12552078 A JP12552078 A JP 12552078A JP S5553188 A JPS5553188 A JP S5553188A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- frequency
- electromotive voltage
- inverter
- output
- 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)
Abstract
PURPOSE: To drive an ac motor economically and excellently by sensing the approximate coincidence of the frequency of a counter electromotive voltage of a motor and the frequency of an inverter output, and changing the frequency step by step.
CONSTITUTION: The coincidence of the output signal frequency A of a counter- electromotive voltage sensor 17 for sensing a counter electromotive voltage of at least 1 motor of motors 10 and the output frequency B of an inverter 15 is sensed by a frequency coincidence sensor 18. A control circuit 19 receives the output signal C and sends out the control signals D and E in order to control an inverter 15 and capacitors 16 for power-factor improvement. In this constitution, the current or power for which counter electromotive voltage of the motor or the power factor of the inverter output can be sensed, and the ac motor can be driven efficiently.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12552078A JPS5553188A (en) | 1978-10-12 | 1978-10-12 | Power supply for driving ac motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12552078A JPS5553188A (en) | 1978-10-12 | 1978-10-12 | Power supply for driving ac motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5553188A true JPS5553188A (en) | 1980-04-18 |
Family
ID=14912179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12552078A Pending JPS5553188A (en) | 1978-10-12 | 1978-10-12 | Power supply for driving ac motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5553188A (en) |
-
1978
- 1978-10-12 JP JP12552078A patent/JPS5553188A/en active Pending
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