| 摘要 |
A distributed coil stator ( 102 ) for external rotor electric motors includes a core having a cylindrical surface bounded by a first end surface and a second end surface, wherein a first set of openings ( 110 ) aligned in a first circular path ( 111 ) extends within the core from the first end surface to the second end surface, a second set of openings ( 114 ) aligned in a second circular path ( 115 ) positioned concentrically within the first circular path extends within the core from the first end surface to the second end surface, and a third set of openings ( 118 ) aligned in a third circular path ( 119 ) positioned concentrically within the second circular path extends within the core from the first end surface to the second end surface.
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