| 摘要 |
PURPOSE:To obtain a permanent magnet rotor which has satisfactory rotating strength and preferable operating characteristics when associated in a rotary electric machine by welding a magnet protecting plate to a nonmagnetic spacer between a magnetic cylindrical rim and the permanent magnet. CONSTITUTION:Since a permanent magnet 5 and a nonmagnetic spacer 4 are secured by a magnet protecting plate 6 of U-shaped longitudinal section welded to a rim 1 and a nonmagnetic protecting plate 11, it is very rigidly pressed, and even if rotated at a superhigh speed, it is not deformed nor damaged. The gap 8 can be effectively buried by filling and solidifying thermosetting synthetic resin from a pore 9 formed freely near the ends of both sides of the magnet after evacuating in vacuum, thereby preventing the damage of the magnet 5.
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