JPS6443089A - Speed control device for induction motor - Google Patents
Speed control device for induction motorInfo
- Publication number
- JPS6443089A JPS6443089A JP62197044A JP19704487A JPS6443089A JP S6443089 A JPS6443089 A JP S6443089A JP 62197044 A JP62197044 A JP 62197044A JP 19704487 A JP19704487 A JP 19704487A JP S6443089 A JPS6443089 A JP S6443089A
- Authority
- JP
- Japan
- Prior art keywords
- rotating speed
- deviation
- slip frequency
- command current
- speed
- 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 suppress torque pulsation produced in acceleration or deceleration and to improve the accelerating and decelerating characteristics, by setting up the instantaneous value current of each phase as a command current when a motor is at a rotating speed based on its speed command value depending on the speed deviation. CONSTITUTION:A command current setting circuit 21 is composed of a subtractor 21a, a slip frequency setter 21b and a command current operation section 21c. The subtractor 21a finds the deviation between a rotating command value f'm from a rotating speed setter 22 and a rotating speed fm from a rotating speed detector 5, i.e. the deviation of the rotating speed fm (f'm-fm). The slip frequency setter 21b sets a slip frequency fs based on the deviation fm. With the command current operation section 21c based on the slip frequency fs and rotating speed fm the instantaneous currents for two phases ia and ib are found by operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197044A JPS6443089A (en) | 1987-08-05 | 1987-08-05 | Speed control device for induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197044A JPS6443089A (en) | 1987-08-05 | 1987-08-05 | Speed control device for induction motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6443089A true JPS6443089A (en) | 1989-02-15 |
Family
ID=16367784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62197044A Pending JPS6443089A (en) | 1987-08-05 | 1987-08-05 | Speed control device for induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6443089A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009005440A (en) * | 2007-06-19 | 2009-01-08 | Hitachi Industrial Equipment Systems Co Ltd | Induction motor driving device, motor driving system, and elevator system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5879489A (en) * | 1981-11-04 | 1983-05-13 | Fanuc Ltd | Control system for ac motor |
JPS59103588A (en) * | 1982-12-01 | 1984-06-15 | Hitachi Ltd | Controller for induction motor |
-
1987
- 1987-08-05 JP JP62197044A patent/JPS6443089A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5879489A (en) * | 1981-11-04 | 1983-05-13 | Fanuc Ltd | Control system for ac motor |
JPS59103588A (en) * | 1982-12-01 | 1984-06-15 | Hitachi Ltd | Controller for induction motor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009005440A (en) * | 2007-06-19 | 2009-01-08 | Hitachi Industrial Equipment Systems Co Ltd | Induction motor driving device, motor driving system, and elevator system |
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