Improvement of a magnetic rotary element for propulsion of a self-running actuator

This paper presents a magnetic-pole type rotary element whose axis of rotation is parallel to the direction of the exciting magnetic field. This rotary element, composed of grain-oriented silicon steel, permanent magnet and acrylic fiber whose movement principle is similar to that of synchronous motors. Therefore, the starting torque of element was still small and the moving direction was also unstable. In order to solve these problems, the magnetization direction of magnets distributed on the rotor surface were inclined to the fixed rotation direction. In addition, triangular silicon steel sheets were used instead of the previous rectangular one