Resolver based position estimation of vector controlled PMSM drive fed by matrix converter

This paper proposes resolver based position estimation for matrix converter fed permanent magnet synchronous motor (PMSM) drive. A matrix converter fed PMSM drive replaces the conventional voltage-source inverter (VS I) drive due to its advantageous feature like elimination of bulky and life limited dc-link capacitors, inherent bidirectional power flow, the sinusoidal input current drawn and controllable input power factor. The ZDAC control is implemented to achieve the independent control of speed and torque in PMSM drive. High frequency signal is applied to excite the resolver primary winding. Demodulation based algorithm is implemented to calculate the speed and rotor position. Feedback loop control is used to compute the rotor position from the resolver. The accurate position is estimated without using resolver to digital converter. The dynamic performance of proposed drive is simulated in Matlab/Simulink environment under load variation.