Ac output voltage control with minimization of voltage stress across devices in the Z-source inverter using modified SVPWM

The paper proposes the algorithms of ac output voltage control in the Z-source inverter while minimizing the voltage stress across the devices. A novel switching pattern in the SVPWM is used in order to boost easily the capacitor voltage by controlling a shoot through time. The possible operating region for obtaining a desired ac output voltage to dc input voltage is analyzed. The voltage stress across the switching devices can be so mush reduced at a given ac output voltage. The proposed methods are verified with the simulation studies and experiments with 32-bit DSP.