JPS57151291A - Controlling system and device for induction motor - Google Patents
Controlling system and device for induction motorInfo
- Publication number
- JPS57151291A JPS57151291A JP56035014A JP3501481A JPS57151291A JP S57151291 A JPS57151291 A JP S57151291A JP 56035014 A JP56035014 A JP 56035014A JP 3501481 A JP3501481 A JP 3501481A JP S57151291 A JPS57151291 A JP S57151291A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- command
- exciting
- 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
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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0077—Characterised by the use of a particular software algorithm
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To suppress the exciting sound of a motor at the light load time by outputting a current command due to the deviation between a speed command and an actual speed and controlling the induction motor so that the ratio of the secondary current to the exciting current becomes constant when the motor is driven on the basis of the command. CONSTITUTION:The speed of an induction motor 101 is detected by a resolver 102, is then converted by a converter 104 to an analog value, and is compared by an arithmetic unit 108 with a command signal. The deviation is inputted through an absolute value circuit 110 to a cubic root function generator 111, is then digitized by a converter 112, and is then applied to a microcomputer 113, which calculates it with the actual speed and produces a 3-phase sinusoidal signal having constant phase difference from the amplitude signal, and the motor 101 is controlled through an inverter 124. Therefore, the exciting current is varied in response to the torque, thereby suppressing the exciting sound at the light load time, and the ratio of the exciting current to the secondary current is maintained constant, thereby controlling the power factor constantly and the reactive power to the minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56035014A JPS57151291A (en) | 1981-03-11 | 1981-03-11 | Controlling system and device for induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56035014A JPS57151291A (en) | 1981-03-11 | 1981-03-11 | Controlling system and device for induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57151291A true JPS57151291A (en) | 1982-09-18 |
Family
ID=12430211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56035014A Pending JPS57151291A (en) | 1981-03-11 | 1981-03-11 | Controlling system and device for induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57151291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03218291A (en) * | 1990-01-24 | 1991-09-25 | Mitsubishi Electric Corp | Controller for induction motor |
-
1981
- 1981-03-11 JP JP56035014A patent/JPS57151291A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03218291A (en) * | 1990-01-24 | 1991-09-25 | Mitsubishi Electric Corp | Controller for induction motor |
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