| 摘要 |
A brushless motor as an example of the invention has a stationary assembly 2 having a first housing member 10 made of a ferromagnetic material and a stator 20 held in the first housing member 10 , and a rotor 6 having a rotor magnet 70 facing the stator 20 . A annular shield plate 80 held by the rotor 6 is disposed between the rotor magnet 70 and the first housing member 10 and, further, an outer circumferential face 80 a of the shield plate 80 is disposed between a magnetically neutral area 46 in the radial direction in the lower end of the rotor magnet 70 and the outer circumferential face of the rotor magnet 70.
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