JPS56112892A - Controlling method for pole change type induction motor - Google Patents
Controlling method for pole change type induction motorInfo
- Publication number
- JPS56112892A JPS56112892A JP1471980A JP1471980A JPS56112892A JP S56112892 A JPS56112892 A JP S56112892A JP 1471980 A JP1471980 A JP 1471980A JP 1471980 A JP1471980 A JP 1471980A JP S56112892 A JPS56112892 A JP S56112892A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- change type
- induction motor
- type induction
- 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 perform control of high efficiency by switching the pole number of the motor and by switching an inverter to the V/F ratio selected appropriately at the time of a low-speed mode of constant torque control in an inverter driving method. CONSTITUTION:A DC power source 1 drives the pole change type induction motor 3 through the intermediary of a PWM inverter 2 and a selecting switch 4. In addition, a speed instruction and a selecting level instruction L given by an instructing unit 5 are compared by a comparator 10 and by the signal thereof the pole number selecting switch 4, as well as a V/F ratio selecting switch 11, is operated. Moreover, the speed instruction is delivered to a function generator 8 and inputted in a modulator 12 through the intermediary of the switch 11, supplying a signal for chopping to the inverter 2. Therefore, the inverter can be switched to the V/F ratio selected properly at the time of low-speed operation, and thus the linear current can be reduced without giving any damage to the constant torque characteristic and the efficiency can be raised.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1471980A JPS56112892A (en) | 1980-02-12 | 1980-02-12 | Controlling method for pole change type induction motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1471980A JPS56112892A (en) | 1980-02-12 | 1980-02-12 | Controlling method for pole change type induction motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56112892A true JPS56112892A (en) | 1981-09-05 |
Family
ID=11868936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1471980A Pending JPS56112892A (en) | 1980-02-12 | 1980-02-12 | Controlling method for pole change type induction motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56112892A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5100120A (en) * | 1988-10-21 | 1992-03-31 | Oki Electric Industry Co., Ltd | Cut-sheet feeder control method |
US5777459A (en) * | 1996-11-18 | 1998-07-07 | Sundstrand Corporation | Induction electrical power generating system with variable numbers of poles and excitation frequency |
-
1980
- 1980-02-12 JP JP1471980A patent/JPS56112892A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5100120A (en) * | 1988-10-21 | 1992-03-31 | Oki Electric Industry Co., Ltd | Cut-sheet feeder control method |
US5777459A (en) * | 1996-11-18 | 1998-07-07 | Sundstrand Corporation | Induction electrical power generating system with variable numbers of poles and excitation frequency |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY126919A (en) | Starting control method of and control apparatus for synchronous motor, and air conditioner, refrigerator, washing machine and vacuum cleaner each provided with the control apparatus | |
NO970012L (en) | Brushless direct current motor with accelerated phase rate control | |
ES2003944A6 (en) | Supply current limiter for a direct current electric motor. | |
KR830008455A (en) | Induction Motor Driving Method | |
EP0038214A2 (en) | Pulse control circuit for permanent magnet D.C. motor | |
US5463300A (en) | AC motor controller with 180 degree conductive switches | |
JPS56112892A (en) | Controlling method for pole change type induction motor | |
ES426704A1 (en) | Braking circuit for alternating current induction motor | |
JPS6434192A (en) | Controlling device for dc motor | |
JPS56112893A (en) | Controlling method for induction motor | |
ES8302382A1 (en) | Shunt field control apparatus and method | |
JPS56150991A (en) | Brushless direct current motor | |
JPS5783102A (en) | Control system of dual mode vehicle | |
SU1344711A1 (en) | Direct current electric drive of mine hoist unit | |
SU609198A1 (en) | Dc electric drive | |
JPS54119610A (en) | Step motor driving controller | |
JPS5583402A (en) | Mobile power supply car | |
JPS54153218A (en) | Driving system of step motor | |
SU726643A1 (en) | Device for regulating induction motor r.p.m. | |
SU770872A1 (en) | Maneuver locomotive electric drive | |
SU983949A1 (en) | Electric drive | |
SU1602775A1 (en) | Apparatus for controlling rotational speed of vehicle traction electric motor | |
SU1605304A1 (en) | D.c. electric drive | |
SU936322A2 (en) | Reversible dc drive | |
JPS5713996A (en) | Controlling method of inverter |