| 摘要 |
PROBLEM TO BE SOLVED: To combine excellent start-up stability and low cogging torque, in a single-phase brushless motor.SOLUTION: In an outer rotor type single-phase brushless motor, when the cavity dimension between a rotor 120 at one end of a salient pole face 105 is d, the cavity dimension at the other end is d, and the minimum dimension of cavity is d, following relation is satisfied d<d<d. The cavity is dat a position shifted to the side of the end where the cavity is dfrom the center of an arc constituting the salient pole face 105. |
