METHOD AND CONTROL DEVICE WITHOUT POSITION SENSOR FOR MOTOR WITH PERMANENT MAGNETS WITH ACTIVATION BY MEANS OF LONG CABLE

摘要

FIELD: electrical equipment.;SUBSTANCE: invention relates to the electrical equipment. Control method without position sensor for motor with permanent magnets with actuation by means of long cable is based on addition of communication circuit after step-up transformer in actuation circuit by means of long motor cable with constant magnets. In implementing the disclosed method, transmitting three high-frequency detection signals with different frequencies to a power cable and motor winding by means of three communication transformers in communication circuit respectively, obtaining high-frequency voltage components on primary windings of communication transformers by band-pass filters, obtaining position signals according to ratios between effective values of high-frequency voltage components and, finally, implementation of engine control without position sensor by means of controller in accordance with received position signals.;EFFECT: technical result is wider range of controlling engine speed and high accuracy of determining position.;8 cl, 6 dwg