Variable speed PMSM drive with DC link voltage controller for light weight electric vehicle

This paper proposes a new and simple while cost-effective method for DC link voltage controller for a light weight electric vehicle with Permanent Magnet Synchronous Motor (PMSM) drive. A bi-directional boost converter with PI regulated variable duty cycle is used for maintaining a constant DC link voltage. Keeping the DC link voltage constant provides better performance under variable load condition. The vector controlled PMSM drive allows to follow the exact speed command for variable applied load condition. The design of direct and quadrature axis current regulator for the PMSM motor is also discussed. The DC link voltage controller along with vector control PMSM drive has been simulated in MATLAB/Simulink.