Cascaded H-bridge MLI is most efficient topology for medium and high voltage DC-AC conversion, having less output harmonics and less commutation losses. Disadvantages is their complexity, more no. of power devices, passive components and a complex control circuitry. This paper focus on single phase 5 level inverter with characteristics like output voltage boosting ability along with capacitor voltage control. The proposed topology uses CHB with bidirectional switches and 4 auxiliary switches producing boost up output voltage. Here a hybrid PWM technique is applied to control the power devices. There is comparative study between CHB and proposed topology between number of power devices used and THD. THD of proposed topology is reduced and analyzed by FFT window. The result are simulated by MATLAB/SIMULINK software.

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Ashok Kumar Patel

Papers

Cascaded H-bridge 5-level Inverter on Hybrid PWM Technique with Voltage Boosting Ability