With ongoing technological advancements, modern utility vehicles such as engineering machinery, electric sightseeing cars, golf carts, and patrol vehicles are increasingly adopting high-efficiency AC motors like permanent magnet synchronous motors and three-phase AC asynchronous motors. In these applications, the motor controller is typically connected to the vehicle battery via a DC contactor for power switching. While PWM (Pulse Width Modulation) modules within motor controllers contribute to energy-saving control, their potential for further efficiency improvement is limited.