Regenerative energy control of electric vehicles applied to a dual power system

The structure of the conventional electric vehicle (EV) consists of a single power system, and is operated by installing a single motor on a single axle. In contrast, a dual power system is operated by installing two motors on a single axle. This system is used for special purposes because of some of its characteristics such as limited space and efficiency compared with the single power system. In this study, various effects of applying two interior permanent magnet synchronous motors (IPMSMs) to a dual power system were analyzed, as IPMSMs exhibit high efficiency and high density. It was found that if the regenerative energy of the dual power system was applied to the electric vehicle, battery life could be increased. To verify the proposed system, PSIM simulation was performed using a parallel inverter and a single inverter. Furthermore, it was verified using a real experiment set that the inverters reduce braking time through the regenerative energy.