METHOD FOR TWO-BAND AMPLITUDE-PHASE OVEREXCITEMENT OF SYNCHRONOUS-HYSTERESIS MOTORS Russian patent published in 2009 - IPC H02P21/05 H02P6/00 

FIELD: electricity.

SUBSTANCE: invention refers to the field of electric engineering. For this purpose in the method simultaneously with increasing and subsequent lowering supply voltage to initial level following is performed: resulting voltage vector is adjusted, free vibration period of motors T₀ with inertial load at initial pressure level is predetermined. Voltage increase from initial level is performed within time period that is considerably less than T₀ (for instance 0.01 T₀), and simultaneously voltage vector phase is turned in direction opposite to engine rotor rotation by angle Δα=15-20 el. dg. relative to phase of synchronous coordinates system. Subsequent voltage lowering to initial voltage level is performed within time period not exceeding T₀ (less than 0.01 T₀) simultaneously turning voltage vector in rotor rotation direction by the same angle Δα.

EFFECT: increase in energy effectiveness of synchronous-hysteresis motor (SHM), lowering fluctuations of moment and speed during regulation, and providing stability.

2 cl, 4 dwg