Switching Losses Minimization Method for EV Inverter with Individual Sequential Gating of Parallel-Connected Switches

To achieve high output currents at a low cost, semiconductor switch modules are frequently operated in parallel. The simplest way to drive the parallel switching module is to synchronize all on and off gate signals of each switch. Individual control is used in this article to reduce switching losses by applying a short delay time to each switching signal based on current level. Experiments are performed to compare the individual control method and the synchronization control method, and the optimal switching combination with the lowest switching loss is proposed. This proposed switching method is simulated by applying to the Urban Dynamometer Driving Schedule and the Highway Fuel Economy Test, both of which are energy efficiency calculation standards in electric vehicles. The results of the analysis demonstrate the feasibility and practicality of the proposed individual switching method.