Study on Relative Velocity of Moving Disk for Novel HTS Movable Tooth Motor

This paper proposes a novel HTS movable tooth motor (HTS-MTM) for electric vehicles (EVs), which integrates the HTS motor with movable tooth drive by eccentric shaft. The motor has the advantages of compact structure, high power density and high efficiency. The relative velocity between movable tooth and moving disk can be reduced by bearing on eccentric shaft. The structure and working principle of HTS-MTM are introduced. Based on the position relationship of movable tooth drive, the track equation of fixing disk and its deceleration ratio are derived, and the output speed of HTS-MTM is obtained. With the conversion mechanism method, the relative velocity between movable tooth and moving disk track is calculated, and the influences of structural parameters on relative velocity are also analyzed. The result shows that the relative velocity in HTS-MTM can be reduced significantly, which is beneficial for power efficiency.