To provide a high-performance and reliable magnet motor wherein a magnet is prevented from cracking and flying, vibration due to an unbalanced rotor is small, and torque ripples are small.
An inner rotor at which a ring magnet 3 and a yoke 1 are bonded and secured to each other is provided on the outer circumferential surface of the yoke 1 with annular projected portions different in outside diameter. These members are so provided that the projected portion 2b smaller in outside diameter is positioned inside the end face of the ring magnet 3 opposite its abutted end face, when one end face of the ring magnet 3 is abutted against the projected portion 2a larger in outside diameter. The axis line of the yoke 1 is kept in the vertical direction so that the one end face of the ring magnet 3 is abutted against the projected portion 2a, and the ring magnet and the yoke are bonded to each other by adhesive 4.
MATSUSHITA YASUAKI
TAMURA SHINYA
KIRA YOSHIHIRO
| JPS63117646A | 1988-05-21 | |||
| JPH09140077A | 1997-05-27 | |||
| JP2000152570A | 2000-05-30 |
Tomoyasu Sakaguchi
Hiroki Naito