JPS56162989A - Speed controlling device for ac motor - Google Patents
Speed controlling device for ac motorInfo
- Publication number
- JPS56162989A JPS56162989A JP6650980A JP6650980A JPS56162989A JP S56162989 A JPS56162989 A JP S56162989A JP 6650980 A JP6650980 A JP 6650980A JP 6650980 A JP6650980 A JP 6650980A JP S56162989 A JPS56162989 A JP S56162989A
- Authority
- JP
- Japan
- Prior art keywords
- output
- rotating speed
- motor
- signal
- deviation
- 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
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To enhance the accuracy of a speed controlling device for an AC motor by obtaining the rotating speed of the motor in accordance with a torque instruction signal and a signal proportional to a load torque, detecting the rotating speed of the motor in accordance with a motor terminal voltage to obtain a deviation signal from the speed instruction signal, and calculating a control signal. CONSTITUTION:The output of a speed controlling circuit 5 is proportional to the torque generated at a motor, and the output of a load torque setting circuit 8 is proportional to a load torque. A subtractor 9 produces a deviation between these output signals and outputs a signal proportional to acceleration or deceleration torque. An integrator 10 produces a signal proportional to the rotating speed. The output signal of a V/F converter 12 is a signal proportional to the average value of the actual rotating speed, a deviation amplifier 13 produces a deviation between the output of a speed instructing circuit 4 and the output of the converter 12 and outputs the deviation between the rotating speed calculated by the integrate 10 and the actial rotating speed. An adder 14 sums the output of the amplifier 13 and the output of the integrator 10 and produces a rotating speed signal proportional to the rotating speed of an AC motor 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6650980A JPS56162989A (en) | 1980-05-21 | 1980-05-21 | Speed controlling device for ac motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6650980A JPS56162989A (en) | 1980-05-21 | 1980-05-21 | Speed controlling device for ac motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56162989A true JPS56162989A (en) | 1981-12-15 |
Family
ID=13317868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6650980A Pending JPS56162989A (en) | 1980-05-21 | 1980-05-21 | Speed controlling device for ac motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56162989A (en) |
-
1980
- 1980-05-21 JP JP6650980A patent/JPS56162989A/en active Pending
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