Study of Compensation Method on Dead-time Effects for VSI Fed Drive Systems

In the paper, a digital compensation method on dead-time effects was presented. The dead-time effects on the output waveforms of the drive systems were analyzed, in which the Voltage Source Inverter (VSI) was controlled based on Space Vector Pulse Width Modulation (SVPWM). The main method was to compensate three-phase voltages in terms of current directions, which divided three-phase currents into six regions according to the voltage space vectors figure. The analysis and compensation on dead-time effects were validated through analyzing the simulation and experiment results in a drive system, in which the VSI fed the Permanent Magnet Synchronous Motor(PMSM) without increasing the complexity of the original system.