JPS5631390A - Controlling device for induction motor - Google Patents
Controlling device for induction motorInfo
- Publication number
- JPS5631390A JPS5631390A JP10601979A JP10601979A JPS5631390A JP S5631390 A JPS5631390 A JP S5631390A JP 10601979 A JP10601979 A JP 10601979A JP 10601979 A JP10601979 A JP 10601979A JP S5631390 A JPS5631390 A JP S5631390A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- speed
- high speed
- detector
- time
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
- H02P27/026—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To improve the efficiency of the induction motor at the time of high speed by providing a limiter between a speed detector and a subtractor when controlling the speed of the motor under the primary voltage control. CONSTITUTION:A thyristor 3 and a contactor 4 are provided between a three- phase power source 1 and an induction motor 2 for driving a passenger cage or the like. The rotational speed of the motor 2 is detected by the detector 5, is then applied to the subtractor 7 together with an output signal from a speed reference generator 6 through the limiter 19, and the difference signal therebetween controls the contactor 4 through the thyristor 3 and a logic circuit 10. Accordingly, it is possible to prevent the output signal 6a from the generator 6 from becoming lower than a speed signal 5a from the detector 5 even in light load at the time of high speed operation, and a powering mode of the motor can be resultantly continued without switching the logic circuit 10. A full voltage may be thereby applied to the motor to rotate the motor at high speed, and the efficiency of the motor can be consequently raised at the time of high speed operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10601979A JPS5631390A (en) | 1979-08-22 | 1979-08-22 | Controlling device for induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10601979A JPS5631390A (en) | 1979-08-22 | 1979-08-22 | Controlling device for induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5631390A true JPS5631390A (en) | 1981-03-30 |
Family
ID=14422933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10601979A Pending JPS5631390A (en) | 1979-08-22 | 1979-08-22 | Controlling device for induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5631390A (en) |
-
1979
- 1979-08-22 JP JP10601979A patent/JPS5631390A/en active Pending
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