Using FPGA to Control Six-phase PMSM and Externally Excited Motors Fed by SiC Inverters


This project is to apply 1200V SiC MOSFET modules and FPGA to a 400V/100kW EV motor drive, particularly the six-phase PMSM or externally excited motor. The six-phase motor offers higher power density while the externally excited motor eliminates the needs of the rare earth.


Prototype Hardware

The UTK team will work with Mercedes-Benz team to simulate the six-phase motor control and externally excited motor control. After that, the UTK team will lay out the SiC inverter, code the control algorithm in Xilinx FPGA and do the high-power test using high-power dyno in CURENT. Given SiC devices have much higher switching frequency than Si, it can potentially reduce the differential-mode current while yielding higher common-mode voltage current. The project expects to generate a mixed PWM pattern under different speed/torque scenarios to comprehensively reduce the common-mode and differential-mode current, all implemented in the high-resolution FPGA.

How WBG Can Help

The project anticipates to provide EV companies a compact, light, efficient and super high-power inverter converter, with comprehensive motor control software. More importantly it is going to offset the side effect brought by SiC devices thereby expediting WBG application in EV industry.

Personnel Involved

  • Ximu Zhang
  • Jared Walden