A New Active Impedance Source Inverter with Reduced Voltage Stress Across the Switches

Abstract :

In this paper, a new active impedance source inverter with low voltage stress across the elements and suitable voltage gain is proposed. This feature of the proposed inverter reduces the size, volume and cost of the structure. The proposed inverter consists of two parts: an impedance source on the input side and an H-bridge on the output side, which generates a three-level output voltage. An analysis of the operating modes and the control method applied to generate the gate pulses of the switches is presented, and the voltage gain of the proposed structure is calculated. In addition, the active and passive components of the proposed structure are designed. In the following, a comparative analysis is provided from the points of view of voltage gain, voltage stress across the switches, diodes and also the total voltage of the capacitors, along with a comparative diagram of the number of elements, between the proposed structure and several conventional impedance source structures. Finally, the proposed structure is designed in the PSCAD environment, and its results are fully analyzed, which shows the proper performance of the proposed structure and the accuracy of the obtained equations.

References:

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