Hysteresis Control in Three-Phase Voltage Source Inverter

The current control methods play an important role in power electronic cir- cuits, particulary in current regulated PWM inverters which are widely applied in ac motor drives and continuous ac power supplies where the objective is to produce a sinusoidal ac output. The main task of the control systems in cur- rent regulated inverters is to force the current vector in the three phase load according to a reference trajectory.In this paper, two hysteresis current control methods (hexagon and square hysteresis based controls) of three-phase voltage source inverter (VSI) have been implemented. Both controllers work with current components represented in stationary (α, β) coordinate system.