CONTROL METHOD FOR MULTI-MOTOR HYSTERETIC ELECTRIC DRIVE Russian patent published in 2009 - IPC H02P5/74 H02P25/02 H02P27/08 

FIELD: electric engineering.

SUBSTANCE: invention relates to electric engineering and may be used in textile industry to drive winding units and gas spin dryers and in other machine-building industries. The control method provides for reducing voltage during overdrive from heavy-duty level to a deeply depressed level of rated voltage value when electromagnetic torque margin in motor remains on the rated level as it is when nominal load is created in motor shaft. In case of one or several rotor synchronism failure, voltage is initially increased from the rated to startup voltage level before the overdrive process is repeated. Then, time is delayed to bring the failed motor into synchronism. The control method for multi-motor hysteretic electric drive ensures long-term operation in synchronised mode at low rated feeding voltage with high drive efficiency factor.

EFFECT: increased power parametres during overdrive mode.

4 dwg