SU687552A1 - Device for control of three-phase induction electric motor - Google Patents
Device for control of three-phase induction electric motorInfo
- Publication number
- SU687552A1 SU687552A1 SU752106149A SU2106149A SU687552A1 SU 687552 A1 SU687552 A1 SU 687552A1 SU 752106149 A SU752106149 A SU 752106149A SU 2106149 A SU2106149 A SU 2106149A SU 687552 A1 SU687552 A1 SU 687552A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electric motor
- control
- phase induction
- induction electric
- terminals
- Prior art date
Links
Landscapes
- Stopping Of Electric Motors (AREA)
Description
(54) УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ ТРНХФАЗПЫ.М АСИНХРОННЫМ ЭЛЕКТРОДВПГ.ЛТЕЛЕЛг(54) DEVICE FOR CONTROL OF TRNHFAZPY.M ASYNCHRONOUS ELECTRODVPG.LTELELg
трансформатора. Вал двигател 4 неподвижен . Изменение тока во вторичной обмотке 6 определ етс переключением коммутирующего ключа 9 с частотой, значительно превышающей частоту напр жени питани , и с измен ющейс скважностью, что приводит к изменению падени напр жени на первичных обмотках 2 трансформатора 1. На фд.-гы двигател 4, таким образом, подаетс синусоидальное напр жение питани , модулированное но амплитуде высокой частотой .transformer. The engine shaft 4 is fixed. The change in current in the secondary winding 6 is determined by switching the switching key 9 with a frequency much higher than the frequency of the supply voltage, and with varying duty cycle, which leads to a change in the voltage drop across the primary windings 2 of the transformer 1. On the engine f 4-gy 4, thus, a sinusoidal supply voltage, modulated but amplitude high frequency, is applied.
Так как частота питани и частота модул ции посто нны, то емкость конденсаторов 5 выбираетс из услови допустимых пульсаций тока в фазах двигател 4 при максимальной скважности широтно-импульсного модул тора 10, т. е. минимальном моменте или минимальной частоте вращени . В этом случае конденсаторы 5 обеспечивают максимальный коэффициент мощности.Since the supply frequency and modulation frequency are constant, the capacitance of the capacitors 5 is selected based on the condition of permissible current pulsations in the phases of the motor 4 at the maximum duty cycle of the pulse-width modulator 10, i.e. the minimum torque or minimum rotation frequency. In this case, the capacitors 5 provide the maximum power factor.
Изменением скважности импульсов щиротно-импульсного модул тора 10 можно регулировать частоту вращени или стаби лй и-рввать ее с большой точностью при изменении момента нагрузки в широких пределах при изменении напр жени и частоты питани .By varying the duty cycle of pulses of the tweeter-modulator 10, the rotational frequency can be adjusted or stabilized and torn it with great accuracy when the load torque varies widely when the voltage and power frequency varies.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752106149A SU687552A1 (en) | 1975-01-06 | 1975-01-06 | Device for control of three-phase induction electric motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU752106149A SU687552A1 (en) | 1975-01-06 | 1975-01-06 | Device for control of three-phase induction electric motor |
Publications (1)
Publication Number | Publication Date |
---|---|
SU687552A1 true SU687552A1 (en) | 1979-09-25 |
Family
ID=20610418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU752106149A SU687552A1 (en) | 1975-01-06 | 1975-01-06 | Device for control of three-phase induction electric motor |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU687552A1 (en) |
-
1975
- 1975-01-06 SU SU752106149A patent/SU687552A1/en active
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