FIELD: electric drives. SUBSTANCE: method involves shaping of signal for setting quasi-frequency control and synthesis conditions by means of supply voltage selector switches of induction motor, following additional operations being introduced: generation of sync pulses related to moments when supply voltage crosses zero; generation of selector-switch control signals in the form of current or voltage pulses whose length and repetition rate are factors determining polarity and number of supply-voltage half-cycles in motor supply voltage being synthesized to ensure predominance of specified harmonic and to set amplitude in motor supply voltage being synthesized. EFFECT: enhanced reliability of speed control. 15 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| METHOD AND DEVICE FOR QUASI-FREQUENCY STEPLESS START OF SYNCHRONOUS MOTOR | 2004 |
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