Master-slave Cascade Multilevel Inverter for Motor Drive Control of Electric Vehicles

A cascade multilevel inverter based on master-slave control principle is proposed in this paper. It consists of three master cells (one for each phase) and a cascade of 3N slave cells (N for each phase), which are composed of DC power supplies and H-bridge inverters. Master-slave communication is used to transmit data between master and slave cells, and the capacity of slave cells are balanced by bubble sort. This structure can be used to control the PMSM in hybrid electric vehicles. The simulation model based on Matlab/Simulink is established. Simulation results validate the effectiveness and superiority of the proposed master-slave hybrid cascade multilevel inverter.