Switching Loss Reduction in Dual Inverter Topology Using Optimized Modulation Strategy

The Dual Inverter (DI) stands out as an optimal solution for electric drives and aviation, offering multilevel capabilities, high fault tolerance, waveform quality, and efficiency. Particularly, in configurations with isolated DC sources, a diverse array of modulation techniques can be effectively implemented. This paper compares the 60
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Discontinuous Pulse-Width Modulation (DPWM)–well established technique for conventional two-level inverters, against the proposed Near State Pulse-Width Modulation (NSPWM) for DI, specifically examining their impact on switching losses. The assessment relies on a comprehensive MATLAB/Simulink model of the DI, incorporating SiC MOSFETs transistors parameterized in accordance with the manufacturer’s specifications. Additionally, a 12 kW squirrel cage induction motor is employed as the load for simulation purposes.