Smart Stator Tooth Design with novel Control and Safety Functions in Electric Vehicle Drivetrains

The paper shows a new approach for combining power electronics and electric motor in an (H)EV application. In the realized drive unit, each stator coil of the motor has its own power electronics and control module. Coil, power electronics and control module are combined in a smart stator tooth (SST). This SST-approach provides advantages in functionality, installation space, weight and interfaces. Furthermore, the SST improves system availability and safety, which is very important in vehicle applications. The paper discusses the behavior of the SST system for certain important failure cases. A finite elements simulation of motor currents and torques shows, that the system is fail-operational.