JPS5622590A - Controller for induction motor - Google Patents
Controller for induction motorInfo
- Publication number
- JPS5622590A JPS5622590A JP9595679A JP9595679A JPS5622590A JP S5622590 A JPS5622590 A JP S5622590A JP 9595679 A JP9595679 A JP 9595679A JP 9595679 A JP9595679 A JP 9595679A JP S5622590 A JPS5622590 A JP S5622590A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- output
- omegarc
- induction motor
- 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
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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/06—Rotor flux based control involving the use of rotor position or rotor speed sensors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To prevent a rise of primary voltage and the improvement of a primary power-factor in field-weakening control performing operation at constant output under a vector control by a system wherein magnetic flux is weakened in proportion to speed up to a fixed speed, and the magnetic flux is reduced within a fixed change range at speed faster than the fixed speed. CONSTITUTION:A function generator 22, which employs only ¦omegar¦ which is the speed of revolution of an induction motor as input, and has the output of logical signals up to omegarc fixed angular velocity, and whose output changes in attenuation characteristics to ¦omegar¦ at not less than omegarc, is added to a circuit enabling automatic field-weakening control vector-controlling the induction motor by using a pulse width modulating inverter 1. Its output and output from a multiplier 11 are inputted to a comparatot 13 through a multiplier 21. Thus, when the induction motor is operated at constant output within a speed region of not less then omegarp=1 base speed, the speed is changed at PHI2infinity 1/omegar up to omegarc the fixed angular speed, and changed so that PHI2 is controlled within a shaded line range of (2)' and (3)' shown in a graph at omegarc or more, and the reduction of a rise of primary terminal voltage and the improvement of a primary power-factor can be attained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9595679A JPS5622590A (en) | 1979-07-27 | 1979-07-27 | Controller for induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9595679A JPS5622590A (en) | 1979-07-27 | 1979-07-27 | Controller for induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5622590A true JPS5622590A (en) | 1981-03-03 |
Family
ID=14151685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9595679A Pending JPS5622590A (en) | 1979-07-27 | 1979-07-27 | Controller for induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5622590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136288A (en) * | 1982-02-08 | 1983-08-13 | Hitachi Ltd | Controlling method for induction motor |
| JPH0232788A (en) * | 1987-06-12 | 1990-02-02 | Hitachi Ltd | Control of motor and motor control device |
| JP2012135070A (en) * | 2010-12-20 | 2012-07-12 | Hitachi Ltd | Controller of ac motor system |
-
1979
- 1979-07-27 JP JP9595679A patent/JPS5622590A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136288A (en) * | 1982-02-08 | 1983-08-13 | Hitachi Ltd | Controlling method for induction motor |
| JPH0465640B2 (en) * | 1982-02-08 | 1992-10-20 | Hitachi Ltd | |
| JPH0232788A (en) * | 1987-06-12 | 1990-02-02 | Hitachi Ltd | Control of motor and motor control device |
| JP2012135070A (en) * | 2010-12-20 | 2012-07-12 | Hitachi Ltd | Controller of ac motor system |
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