Abstract
This paper presents an improved control scheme of a new self-decelerating permanent-magnet (SDPM) in-wheel motor, the direct torque control (DTC) method is adopted based on flux linkage adaptive approach and SVPWM technique. The topological structure and operating principle of the proposed SDPM in-wheel motor for electric vehicles (EVs) is introduced. According to the mathematical model of this motor, the expected voltage calculation and flux linkage adaptive models are established. Furthermore, the improved DTC method based on the proposed PM motor is verified by simulation and experiment results. The results show that the improved DTC algorithm has the merits of rapid dynamic response, low torque and flux linkage ripple, fixed switching frequency, good sinusoidal current, and small reactive current component. Therefore, it can meet the high performance requirement for EVs drive system.
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