文档介绍：外转子无刷直流永磁电动机结构在无刷永磁电动机原理一节中曾介绍一个具有六凸极的内定子与外转子的模型,这里介绍的外转子直流无刷永磁电动机,采用有18个凸极的内定子,由冲制的硅钢片叠成,见下图。为减轻重量,定子中心部分是空的,由内定子机架与转轴机座固定,见下图。platesfortanklap,(PE)orzero(PEN)plywiththefollowingrequirements:(PE)orzero(PEN)trunkconnections;-galvanizedcablebridgebetweenbothendsoftheconnectionplatesbridgedcoppergroundwire,groundingallowedminimumcross-sectionalareaofnotlessthan4mm2;,:,aluminumorfiberglassCableTraylengthsover15mwiththeslipjoint;pensationslot;,notlessthanminimumtraycableallowstheturningradius,minimumbendingradiusofthecableshowninthetablebelow;TablecableminimumallowsbentRADIUSserialnumbercabletypeminimumallowsbentradius1noleadBaoGangkainursingsetsofrubberinsulationpowercable10D2hassteelarmorednursingsetsofrubberinsulationpowercable20D3PVCinsulationpowercable10D4makejointPVCinsulationpowercable15Dmorethan5morecorecontrolcable10DNote:,用来产生旋转磁场。在定子机架上还安装有4个反射式光电开关元件(见下图),与转子外壳内安装的编码盘一同组成转子位置检测装置。外转子由六片圆弧片状永磁体磁极组成,磁极采用强永磁材料制成,磁场方向为径向,相邻磁极磁场方向相反,三个磁极N极向内,三个磁极S极向内。磁极粘贴在机壳(上端盖)内圆周,机壳又是磁軛,提供转子磁路。在外转子内还安装有编码盘与定子上的反射式光电开关元件一同组成转子位置检测装置。下面是外转子的正视图与侧视图。将外转子安装在转轴机座的轴承上,platesfortanklap,(PE)orzero(PEN)plywiththefollowingrequirements:(PE)orzero(PEN)trunkconnections;-galvanizedcablebridgebetweenbothendsoftheconnectionplatesbridgedcoppergroundwire,groundingallowedminimumcross-sectionalareaofnotlessthan4mm2;,connectbothendsoftheBoardnotlessthan2lockingnutandlockwasherfixingboltsoftheconne