A novel SVPWM Overmodulation technique based on voltage correcting function

This paper presents a new Space Vector Pulse Width Modulation (SVPWM) strategy for voltage regulation of a Voltage Source Inverter (VSI) enabling the continuous transition from the linear modulation to the six-step mode. Overmodulation operation is based on a correcting function method modifying properly the amplitude and the phase angle of the VSI output voltage. The evaluation of the method is explored via frequency analysis of the inverter voltage and motor currents in order to be able to evaluate the possible impact of the drive system. Simulation results demonstrate the effectiveness of the proposed SVPWM Overmodulation algorithm applied on sensorless speed control of a salient-pole Synchronous Machine (SM) via Matlab/Simulink utility.