Part 2: A Review Of Battery Charger Topofogies and Infrastrueture For Plug～In Electric and Hybrid VeHicles

摘要

To minimize weight, volume, and cost integrating the charging function into the electric drive system has been proposed. The function can be integrated if charging and traction are not simultaneous. In an integrated charger, motor windings are used for filter inductors or an isolated transformer and the motor drive inverter serves as a bidirectional ac-dc converter. The most important advantage is that low-cost high- power (Levels 2 and 3) bidirectional fast charge can be supported with unity power factor. Control complexity and extra hardware are challenges to implementation in commercial products. A combined motor drive and battery recharge system based on an induction motor is currently used by the Ford Motor Company. A non-isolated integrated charger based on a split-winding ac motor will be used in the automotive industry. There are some applications for electric scooters and two-wheeled vehicles. A typical integrated charger system is shown in Fig. 10.