Single Chip Traction Inverter System using High Performance and Real-time AM263 MCU

A traction inverter converts battery energy into power that controls motor torque and speed, giving it the most influence over an EV's range, performance and driving experience. The typical system consists of safety MCU, DSP for real time motor control processing along with hardware resolver for position sensing. The speed for traction motor is pushed to higher e.g. 10-30K rpm to reduce cost by miniaturizing motor and passive components, which necessitates the real time control loop performance in uSec range. The paper proposed a single chip traction Inverter System using Texas Instruments (TI) AM263 MCU, which is designed for real-time and high performance for optimal system cost for traction inverter. The paper proposes innovative techniques namely optimized Field Oriented Control (FOC) control algorithm with custom math algorithms, Software based resolver and double PWM update for better control performance. The overall solution is prototyped and demoed on hardware design and measured for overall performance. The real-time performance of control loop is 3.9 usec, which is less than 1% for overall processing power for 10K rpm. The proposed single chip solution has 99% headroom for running AUTOSAR operating system and customer's applications for differentiation.