WAY TO CONTROL SYNCHRONOUS ELECTRIC MOTOR IN ELECTROMECHANICAL STEERING WHEEL BOOSTER OF CAR Russian patent published in 2003 - IPC

FIELD: electrical engineering, electromechanical steering wheel booster with A C electric motor drive. SUBSTANCE: in correspondence with given way to control synchronous electric motor in electromechanical steering wheel booster of car angular position of rotor is measured, its harmonic functions are computed and integrated with signal of torque generator and moment setting signal is generated. Current across input of frequency converter is measured, smoothed out, multiplied by sign function of torque generator and is continuously subtracted from moment setting signal. Obtained difference is integrated, limited and multiplied by harmonic functions of angular position of rotor, the latter are converted to three-phase sequence of voltages which resultant vector is directed along lateral axis of electric motor in fixed coordinate system, its amplitude being proportional to signal setting amplitude of phase voltages. Obtained signals are amplified in power, supplied to stator windings, used to form m-phase system of currents in phase windings of synchronous electric motor. As result current consumed from car wiring system and mass and overall dimensions of electromechanical steering wheel booster are diminished. EFFECT: increased accuracy of control over electric motor. 1 dwg