JPS5561292A - Speed controller of induction motor - Google Patents
Speed controller of induction motorInfo
- Publication number
- JPS5561292A JPS5561292A JP13303278A JP13303278A JPS5561292A JP S5561292 A JPS5561292 A JP S5561292A JP 13303278 A JP13303278 A JP 13303278A JP 13303278 A JP13303278 A JP 13303278A JP S5561292 A JPS5561292 A JP S5561292A
- Authority
- JP
- Japan
- Prior art keywords
- revolution
- induction motor
- speed
- circuit
- fixed
- 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 operate an induction motor in approximate rated output characteristics, by mounting an inverter circuit for driving the induction motor and a frequency control means for increasing or decreasing inverter control frequency in a shape that is proportioned to difference between instruction revolution speed and the speed of revolution of the induction motor.
CONSTITUTION: Revolution speed signals input to an instruction signal correcting circuit 1 increase the number of revolution of an induction motor 12 in ideal, fixed torque characteristics. When the speed of the revolution exceeds base speed, the crest value of pulses for driving the induction motor put out from a pulse width controller 11 is restrained in fixed value by means of a reference voltage generating circuit 8, and the induction motor 12 is thereafter controlled in a variable frequency drive shape. The number of revolution of the induction motor 12 is slowly increased with fixed output characteristics after that point of time. The output of the input signal correcting circuit 1 is kept in the same level as a revolution speed instruction signal level by feedback action in the circuit while the induction motor 12 continues its revolution at the speed of revolution instructed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13303278A JPS5561292A (en) | 1978-10-28 | 1978-10-28 | Speed controller of induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13303278A JPS5561292A (en) | 1978-10-28 | 1978-10-28 | Speed controller of induction motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5561292A true JPS5561292A (en) | 1980-05-08 |
Family
ID=15095206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13303278A Pending JPS5561292A (en) | 1978-10-28 | 1978-10-28 | Speed controller of induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5561292A (en) |
-
1978
- 1978-10-28 JP JP13303278A patent/JPS5561292A/en active Pending
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