Modeling and technical analysis of a modified Z-source converter for driving a three-phase induction motor

A modified z-source converter to boost dc voltage is proposed. the modification has been proposed by engaging an additional power switching device in parallel connection to the conventional z-source converter. the effectiveness of the additional power switching device in the z-source converter is demonstrated and discussed in detail. for calculations,a mathematical model of the proposed modified z-source is also presented. for experimental demonstration the proposed modified z-source converter is connected to an independent three-phase dc-to-ac three-phase inverter. the load on the modified z-source converter with a three-phase inverter is a three-phase induction motor. as shown in this paper,the three-phase inverter will play no role boosting the dc voltage. two well-known pwm switching schemes have been implemented on the three-phase inverter. the proposed modified z-source converter successfully boosts the dc voltage; in addition,it is shown that the dc output voltage settling time varies with the pwm modulation index. © pakistan academy of sciences.