| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated fixture structure of core plates capable of preventing a bridge part from being twisted or exfoliated, while suppressing influences upon a magnetic circuit to a minimum in an IPM type brushless motor.SOLUTION: A brushless motor 1 comprises a rotor 3 including a rotor core 15 that is formed by laminating a plurality of rotor core plates 18. The rotor core 15 includes: a core body 15a; a slit 31 in which a magnet 16 is accommodated and fixed; a salient pole part 33 that is formed at an outer circumferential side of the slit 31; and a bridge part 35 that couples the salient pole part 33 and a core body 15a. The magnet 16 is held between right and left magnet fixture steps 32. Radially inside of the bridge part 35, an expansion part 37 is formed from the magnet fixture step 32. In the expansion part 37, a lamination boss 36 is disposed for laminating the core plates 18.SELECTED DRAWING: Figure 3 |
