磁性材料を用いた回転素子のトルク増加についての検討  [in Japanese] A study of Methods for Increasing the Torque of A Rotary Device That Uses Magnetic Materials  [in Japanese]

This paper presents a hard-magnetic-material-type rotary device whose axis of rotation is parallel to the direction of the exciting magnetic field. Cylindrical 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, triagular silicon steel sheets were used instead of the previous rectangular ones. Measurement results show that the improved device has a starting torque in the fixed direction of motion.