| 摘要 |
PURPOSE:To reduce the decrease in motor characteristics due to an eddy current by mounting a stationary material made of nonmagnetic material on the outer periphery of a permanent magnet so as to both secure and to protect the surface of the magnet, thereby preventing the motor from locking. CONSTITUTION:A plurality of permanent magnets 3 are disposed on the outer periphery of a yoke 2, secured by a bonding agent 4, a bonding agent 6 is formed on the outer periphery of the magnets 3, a stationary material 5 made of nonmagnetic metal is mounted thereon, and secured by curing the agent 6. The magnets 3 are rigidly secured to the yoke 2 by the agent 4 and the material 5, and an eddy current generated at the material 5 of nonmagnetic material 5 can be reduced since the linear or strip-shaped material 5 having the radial size of the section or the width size of several millimeters or less is wound. |
