Investigations on High Reliability Permanent Magnet Motor Controller for Electric Vehicle

Electric vehicles are gradually becoming a means of transportation for people, and their technical reliability and safety are very high. The motor controller is a device that converts the battery DC power supply to the three-phase AC power source, and drives the output power of the permanent magnet synchronous motor. This paper designs a permanent magnet motor controller based on Renesas microcontroller. The analysis is carried out from the aspects of component selection, hardware protection structure principle, PCB layout, control algorithm, structural strength and thermal analysis. Finally, the prototype controller is produced and the experimental platform is built. The efficiency characteristic test, power generation test and temperature rise test were performed on the permanent magnet synchronous motor controller. The experimental results verify the rationality of the design.