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In this paper, the performance comparison of Semi-Z-Source Inverter and Full-Bridge Inverter is presented. The Semi-Z-Source DC-DC converter is utilized in its inverting mode. The number of switches used and the current conduction path of Full-Bridge Inverter is double that of Semi-Z-Source Inverter. Hence, Semi-Z-Source Inverters are preferred in inverter applications. Since the voltage gain curve for Semi-Z-Source Inverter is nonlinear, Modified Sinusoidal Pulse Width Modulation technique is used to produce the required pulses for the switches. This paper also describes the modeling and analysis of Semi-Z-Source Inverter in continuous conduction mode. The dynamics introduced by the Z-network of Z-Source converter is considered for the ac small-signal model. The output of Semi-Z-Source Inverter and Full-Bridge Inverter is simulated in MATLAB/Simulink environment. The performance of these two inverter topologies is compared. |
