Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title An Overview: Current Control Technique for Propulsion Motor for EV
Authors Hee-Kwang Lee ; Kwang-Hee Nam
DOI 10.6113/TKPE/2016.21.5.388
Page pp.388-395
ISSN 1229-2214
Keywords EV; IPMSM(Interior Permanent Magnet Synchronous Motor); Cross coupling inductance; Current control
Abstract Electric vehicles (EV) and hybrid EVs (HEV) are designed and manufactured by GM, Toyota, Honda, and Hyundai motors. The propulsion system design process for EV requires integrating subsystem designs into an overall system model to maximize the performance of a given propulsion architecture. Therefore, high-power density and high-torque density are important attributes required for EV applications. To improve torque and power density, propulsion motors are designed for saturation during high-torque operation. The nonlinearity associated with core saturation is modeled by incorporating the cross-coupling inductances, which also behave nonlinearly. Furthermore, in EV environments, the battery is directly connected to the DC link, and the battery changes depending on the state of charge. It will be onerous if as many optimal current commands as different Vdc were made. This paper presents the optimal current commands in the various operating condition and the current control technique in EV environments.