| 摘要 |
PROBLEM TO BE SOLVED: To provide a skeleton-type BLDC motor capable of reducing the resonant noise of a motor while maintaining the performance of the motor by reducing only high-order cogging torque in cogging torque which is generated during motor driving. SOLUTION: The skeleton-type BLDC motor is constituted of a rotor 14 which is separated into an N-pole and an S-pole relative to a pole separation line 40, and a stator 12 wherein the rotor 14 is formed with a air gap and a first pole shoe 22, a second pole shoe 24 and a pair of detent groups 36 are formed on the inside surface wherein an air-gap forming section 60 having a shape formed by removing a specified width from a circle is formed at opposite ends of the rotor 14 through which the pole separation line 40 passes so as to enlarge the air gap with respect to the detent groups 36. COPYRIGHT: (C)2007,JPO&INPIT |
