Dual Inverter-Fed Traction Drive with DC Sources Power Balancing Based on Synchronized PWM

The paper presents results of application of a novel space-vector-based method of synchronized pulsewidth modulation (PWM) for control of dual inverter-fed motor drives. This drive topology includes two insulated dc sources (with equal or different voltages), feeding two standard three-phase inverters, connected with an open-end winding induction motor. Algorithms of synchronized PWM provide both continuous synchronization of the phase voltage of the induction motor and required sharing of the output power between two dc sources. Simulation results are given for dual inverter-fed drive systems with continuous and discontinuous versions of synchronized pulsewidth modulation.