Novel inverter topologies for two-wheel drive electric vehicles with two permanent magnet synchronous motors

Novel topology of an inverter that can independently control two permanent magnet synchronous motors (PMSMs) is proposed. In conventional, 12 switching devices, i.e. two three-phase three-leg inverters, are required to control two PMSMs; thus, the equipment size becomes large. The proposed inverter requires the same number of switches as the conventional inverter, i.e. only 6 switching devices. In this paper, the circuit configuration and control principle of the proposed inverter are introduced; and a controller was constructed using an FPGA. Moreover, the basic characteristics of the inverter, which is connected with two Y-connected RL loads, are shown through computer simulations and experiments. As a result, it was verified through the simulations and the experiments that the proposed inverter could output different amplitude and frequency for each load.