| 发明名称 | Single phase brushless motor | ||
| 摘要 | A single-phase brushless motor has both superior start-up stability and low cogging torque. In the outer-rotor-type single-phase brushless motor, when a gap width between the rotor and one edge of the salient pole surface is defined as d1, a gap width between the rotor and the other edge of the salient pole surface is defined as d2, and a minimum gap width between the rotor and the salient pole surface is defined as d3, the formula d3<d1<d2 is satisfied, and the gap width is d3 at a position shifted toward the one edge of the salient pole surface from the center of the arc shape which forms the salient pole surface. | ||
| 申请公布号 | US9484774(B2) | 申请公布日期 | 2016.11.01 |
| 申请号 | US201313871514 | 申请日期 | 2013.04.26 |
| 申请人 | MINEBEA CO., LTD. | 发明人 | Omura Yuji;Nakano Tomoaki;Nishizawa Masaaki;Sakaguchi Takahiro;Uchikawa Shinichi;Tsukada Tomoyuki |
| 分类号 | H02K1/14;H02K29/03 | 主分类号 | H02K1/14 |
| 代理机构 | Oliff PLC | 代理人 | Oliff PLC |
| 主权项 | 1. An outer-rotor-type single-phase brushless motor comprising: a rotor including a plurality of magnetic poles on an inner circumference surface thereof; and a stator core disposed inside of the rotor including: a plurality of salient poles having an extending portion for winding a stator coil which extends in an outer direction from a rotational center of the rotor, and a salient pole surface facing the magnetic pole at a rotor side, wherein the salient pole surface of each of the salient poles has an arc shape from one edge to an other edge thereof viewed from an axial direction, when a gap width between the rotor and the one edge of the salient pole surface is defined as d1, a gap width between the rotor and the other edge of the salient pole surface is defined as d2, and a minimum gap width between the rotor and the salient pole surface is defined as d3, a formula d3<d1<d2 is satisfied, d2 is a maximum value of the gap width between the rotor and the salient pole surface, d3 is arranged at a position shifted from a midpoint of the arc shape that forms the salient pole surface toward the one edge of the salient pole surface, the inner circumference surface of the rotor forms a circle having a center at the rotational center, and a center of curvature of each arc of each of the salient poles is shifted from the rotational center of the rotor. | ||
| 地址 | Kitasaku JP | ||