| 摘要 |
PROBLEM TO BE SOLVED: To restrain reduction in the clamping force of an armor ring against a permanent magnet while maintaining the strength of an end ring.SOLUTION: A motor rotor 100 comprises a shaft 110, a permanent magnet 120 located outward of the shaft in a radial direction, an end ring 130 located at both ends of the permanent magnet in an axial direction and fixed to the shaft to retain the position of the permanent magnet in the axial direction, and an armor ring 140 that applies surface pressure on an outer periphery of the permanent magnet. A part of the end ring and a part of the armor ring in the circumferential direction face each other with a clearance in the radial direction. The other part of the end ring and the other part of the armor ring in the circumferential direction are engaged in the shaft rotation direction. |
