Design of switching power converter of PMSM power driver for Hybrid Electric Vehicle

The power supply quality has a direct effect on the performance of motor driver as well as total HEV system. Generally, four separated integrated DC/DC converters are used for PMSM power drive, which don't meet the demand of low cost and small size for HEV. In this paper, firstly the input voltage from vehicle is chopped to 5VDC, and then full bridge switching power converter is applied to convert the power supply of 5V to four insolated DC power sources for IGBT switch in the three phase bridge inverter. As experimental results show, the switching power converter system will ensure the power supply quality when the input voltage from vehicle fluctuates in the wide range of 8–30VDC, and is also an efficient way to reduce the overall cost and size of HEV.