A ST-SMO SOGI PLL and LUT Based Sensorless Vector Controlled PMaSyRM Drive for SPV-Battery Fed Light Electric Vehicle

This paper presents a study on the integration of a solar photovoltaic (SPV) charging system with a permanent magnet-assisted synchronous reluctance motor (PMaSyRM) drive for light electric vehicle (LEV) applications. The SPV-powered battery charging system enables a fully green operation for the LEV, eliminating dependence on non-renewable energy sources. A bidirectional DC-DC converter (BDDC) is utilized to extend the LEV's range by capturing and storing energy during regenerative braking. The speed and torque control of the PMaSyRM is achieved using a lookup table (LUT)-based vector control strategy, which optimizes motor performance by adapting to inverter voltage and current constraints as well as variations in motor parameters. For vector control, rotor position information is required for transformation of currents. The rotor position estimation is achieved using a combination of a super-twisting sliding mode observer (ST-SMO) and a second-order generalized integrator phase-locked loop (SOGI-PLL). The ST-SMO provides robust position estimation by effectively handling uncertainties and external disturbances, enhancing the system's overall resilience. Meanwhile, the SOGI-PLL offers high-performance phase and frequency synchronization, ensuring accurate rotor position tracking even under varying operating conditions. By integrating these techniques, the proposed control scheme significantly improves the dynamic response and stability of the PMaSy RM, facilitating seamless operation in the light electric vehicle.