METHOD OF SENSOR-FREE EVALUATION OF ANGULAR POSITION OF ROTOR OF MULTI-PHASE ELECTRIC MOTOR Russian patent published in 2011 - IPC H02P6/18 H02P21/13 

FIELD: electricity.

SUBSTANCE: method of sensor-free evaluation of angular position of rotor of multi-phase electric motor consists in the fact that values of currents and voltages at least of two phases of stator winding of electric motor are measured; measured values are converted to current parameters of rotating Y vector of current and U vector of voltage of stator and subject to digital processing at each step of which evaluation of Y vector is calculated as output value of digital model of stator winding, which is obtained at input value equal to difference of U vector and vector of evaluation of stator e.m.f., which is calculated by the formula where k - feedback factor, - output vector of digital sine-cosine Kalman filter, which is obtained at input vector calculated as per the above formula at the previous step of digital processing, and then, argument of vector and evaluation of angular rotor position, which corresponds to this argument, is determined.

EFFECT: implementation of sensor-free vector control in wide range of rotation speeds, and higher efficiency.

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