利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.011 秒)

    Low profile d.c. brushless motor for an impeller mechanism or the like
    2.
    发明申请
    Low profile d.c. brushless motor for an impeller mechanism or the like 有权

    公开(公告)号：US20060138878A1

    公开(公告)日：2006-06-29

    申请号：US11362198

    申请日：2006-02-27

    申请人： Leslie Hoffman ,  Barton Kenyon ,  David Sears

    发明人： Leslie Hoffman ,  Barton Kenyon ,  David Sears

    IPC分类号： H02K1/04 ,  H02K5/16

    CPC分类号： H02K7/14 ,  F04D25/062 ,  F04D25/064 ,  F04D25/0646 ,  H02K5/08 ,  H02K5/225 ,  H02K7/085 ,  Y10T29/49009 ,  Y10T29/49243

    摘要： An impeller and at least a portion of a cooperating peripheral volute may be integrated into, and preferably are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless d.c. motor with low length (L) to diameter (D) ratio and suitable for use in a variety of other applications. In one practical embodiment of such a motor, a rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a permanently magnetized ring shaped rotor magnet having a number of poles of alternating polarity defined about its inner circumference and separated by a relatively small cylindrical air gap from the outwardly projecting radially oriented selectively magnetized poles of a fixed stator assembly. In one exemplary embodiment, the rotor may have 8 poles and the stator may have 9 poles. The fixed stator assembly is preferably integrally molded into a base housing that also includes a precision fixed bearing support that extends upwardly through the center of the stator assembly and that is rotatably coupled to a rotating shaft that extends downwardly from (and preferably is integral with) the center of the rotating cap. A coaxial pair of preloaded ball bearings is preferably supported between an inner cylindrical surface of the fixed bearing support and an outer cylindrical surface of the rotating shaft, to thereby permit the rotor to rotate precisely about the stator with minimal variation in the cylindrical air gap therebetween.

    Low profile d.c. brushless motor for an impeller mechanism or the like
    4.
    发明申请
    Low profile d.c. brushless motor for an impeller mechanism or the like 有权
    低调直径 用于叶轮机构的无刷电动机等

    公开(公告)号：US20050012411A1

    公开(公告)日：2005-01-20

    申请号：US10795207

    申请日：2004-03-05

    申请人： Leslie Hoffman ,  Barton Kenyon ,  David Sears

    发明人： Leslie Hoffman ,  Barton Kenyon ,  David Sears

    IPC分类号： F04D25/06 ,  H02K5/22 ,  H02K7/08 ,  H02K7/14 ,  H02K9/00 ,  H02K7/00

    CPC分类号： H02K7/14 ,  F04D25/062 ,  F04D25/064 ,  F04D25/0646 ,  H02K5/08 ,  H02K5/225 ,  H02K7/085 ,  Y10T29/49009 ,  Y10T29/49243

    摘要： An impeller and at least a portion of a cooperating peripheral volute may be integrated into, and preferably are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved brushless d.c. motor with low length (L) to diameter (D) ratio and suitable for use in a variety of other applications. In one practical embodiment of such a motor, a rotating cap has an inner circumference which is molded about an outer ferromagnetic back ring that in turn supports a permanently magnetized ring shaped rotor magnet having a number of poles of alternating polarity defined about its inner circumference and separated by a relatively small cylindrical air gap from the outwardly projecting radially oriented selectively magnetized poles of a fixed stator assembly. In one exemplary embodiment, the rotor may have 8 poles and the stator may have 9 poles. The fixed stator assembly is preferably integrally molded into a base housing that also includes a precision fixed bearing support that extends upwardly through the center of the stator assembly and that is rotatably coupled to a rotating shaft that extends downwardly from (and preferably is integral with) the center of the rotating cap. A coaxial pair of preloaded ball bearings is preferably supported between an inner cylindrical surface of the fixed bearing support and an outer cylindrical surface of the rotating shaft, to thereby permit the rotor to rotate precisely about the stator with minimal variation in the cylindrical air gap therebetween.

    摘要翻译： 一个叶轮和一个配合的周边蜗壳的至少一部分可以分别集成到同心外转子和内定子组件中，并且优选地整体地注塑成型，以实现基于改进的无刷直流电机的低轮廓精密叶轮机构。 电机长度低（L）至直径（D）比，适用于各种其他应用。 在这种电动机的一个实际实施例中，旋转盖具有围绕外侧铁磁背环模制的内圆周，该内圆周背部又支撑永久磁化的环形转子磁体，该永久磁化的环形转子磁体具有围绕其内圆周限定的交替极性的极数， 由相对小的圆柱形气隙与固定定子组件的向外突出的径向定向的选择性磁化极分隔开。 在一个示例性实施例中，转子可以具有8个极，并且定子可以具有9个极。 固定的定子组件优选地一体地模制到基座壳体中，该基座壳体还包括精确的固定轴承支撑件，其向上延伸穿过定子组件的中心并且可旋转地联接到从（并且优选地与其成一体）向下延伸的旋转轴） 旋转盖的中心。 一对同轴的预载球轴承优选地支撑在固定轴承支撑件的内圆柱表面和旋转轴的外圆柱形表面之间，从而允许转子精确地围绕定子旋转，其中圆柱形空气间隙的变化最小 。