The Dead Zone Compensation Applied to Induction Motor Vector Control in Inverter

In order to reduce the voltage source type inverter output voltage distortion which caused by dead zone, we analyze the reason of dead zone, then sum up three reasons, list the calculation formula of error voltage which applied to induction motor vector control, finally compensate the dead zone by adding error voltage to inverter. Firstly, calculate the relationship between error time and error current in control cycle. Then compensate the error voltage to the inverter input end within the period T-S. By making up for error voltage, we improved the energy utilization of the power grid side, reduced the influence of the current harmonics to control system. The experimental results show that the strategy has played an important role to improve current waveform.