Fabrication of A Rotary device for Self-Running Magnetic Actuator

Abstract

This paper presents a hard-magnetic-material-type rotary device whose axis of rotation is parallel to the direction of the exciting magnetic field. Permanent magnets and some silicon steel sheets were used to obtain the radial components of the field strength. Because the principle of movement is similar to that of synchronous motors, the starting torque was still small and the moving direction was also unstable. To solve these problems, the permanent 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 ones. And still more, we gave the other two permanent magnets to the axis of rotation. Measurement results show that the improved device has a starting torque in the fixed direction of motion and it's starting torque is larger than the previous one.