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    Motor with permanent magnets having essentially the same inner and outer radius; and method of manufacturing a motor stator housing with permanent magnets
    1.
    发明授权
    Motor with permanent magnets having essentially the same inner and outer radius; and method of manufacturing a motor stator housing with permanent magnets 有权

    公开(公告)号：US08823234B2

    公开(公告)日：2014-09-02

    申请号：US12443191

    申请日：2007-10-12

    申请人： Earl M. Ortt ,  Hung T. Du ,  Sankarshan Murthy

    发明人： Earl M. Ortt ,  Hung T. Du ,  Sankarshan Murthy

    IPC分类号： H02K21/26 ,  H02K23/04 ,  H02K1/17 ,  H02K15/03 ,  H02K1/27

    CPC分类号： H02K1/17 ,  H02K1/2786 ,  H02K15/03 ,  H02K23/04 ,  Y10T29/49009

    摘要： An electric motor has a rotor and a stator. The rotor or the stator has arced permanent magnets that have essentially the same inner radius (IR) and outer radius (OR). In an aspect, the stator has a stator housing having a plurality of poles. Each pole includes a plurality of flat magnets affixed to an inner surface of the stator housing. In an aspect, flats on the outside of the stator housing key the stator assembly in a power tool housing. In an aspect, flat magnets are pre-magnetized, pre-assembled with alternating magnetic polarities, inserted into a stator housing, and remagnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets and unmagnetized magnets are pre-assembled with unmagnetized magnets between magnetized magnets, the pre-assembled magnets inserted into a stator housing, and the unmagnetized magnets magnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets are inserted between anchors inwardly extending from an inner surface of a stator housing with the anchors retaining each magnet placed in the stator housing between anchors from being angularly displaced by subsequently inserted magnets. In an aspect, pre-magnetized magnets are inserted in recesses in an inner surface of a stator housing with the recesses retaining each magnet placed in the stator housing between anchors from being angularly displaced by subsequently inserted magnets. In an aspect, each pole has at least three magnets, at least one of the magnets being thinner than the other magnets. In an aspect, the outer most magnets are made of magnetic material that is more resistant to demagnetization than at least one of the other magnets. In an aspect, the magnets of each pole are unevenly spaced over the pole In an aspect, a power tool includes such an electric motor.

    Method For Forming A Power Tool
    2.
    发明申请
    Method For Forming A Power Tool 有权
    形成电动工具的方法

    公开(公告)号：US20120222288A1

    公开(公告)日：2012-09-06

    申请号：US13472829

    申请日：2012-05-16

    申请人： Hung T. Du ,  Richard T. Walter

    发明人： Hung T. Du ,  Richard T. Walter

    IPC分类号： H01R43/06

    CPC分类号： H02K3/30 ,  H01R43/10 ,  H02K3/48 ,  H02K7/04 ,  H02K15/0056 ,  H02K15/02 ,  H02K15/12 ,  H02K15/165 ,  Y10T29/49009 ,  Y10T29/49011 ,  Y10T29/49012 ,  Y10T29/49071 ,  Y10T29/49073 ,  Y10T29/49075 ,  Y10T29/49995 ,  Y10T29/49996

    摘要： An electric motor has a stator in which an armature is disposed. The armature has a lamination stack having slots in which magnet wires are wound. An armature shaft extends coaxially through the lamination stack and a commutator is disposed on the armature shaft to which ends of the magnet wires are electrically coupled. The magnet wires are at least partially encased in thermally conductive plastic. When the thermally conductive plastic is molded, a balancing feature is formed of the thermally conductive plastic. In aspects, the balancing feature can include a layer of the plastic from which plastic can be removed during balancing; one or more balancing rings adjacent axial sides of the lamination stack from which plastic can be removed to balance the armature; or one or more balancing rings having one or more pockets therein in which one or more weights are disposed to balance the armature.

    摘要翻译： 电动机具有设置有电枢的定子。 电枢具有层叠叠层，其具有缠绕有电磁线的槽。 电枢轴同轴地延伸穿过层压叠层，并且换向器设置在电枢轴上，电磁线的端部电耦合到该电枢轴上。 磁线至少部分地被包裹在导热塑料中。 当导热塑料被模制时，由导热塑料形成平衡特征。 在一些方面，平衡特征可以包括塑料层，在平衡期间可以从其中去除塑料; 一个或多个邻近层压叠层的轴向侧面的平衡环，可以从该平面环移除塑料以平衡电枢; 或一个或多个在其中具有一个或多个凹穴的平衡环，其中设置一个或多个重物以平衡电枢。

    METHOD OF FORMING A POWER TOOL
    3.
    发明申请
    METHOD OF FORMING A POWER TOOL 有权
    形成电动工具的方法

    公开(公告)号：US20110018370A1

    公开(公告)日：2011-01-27

    申请号：US12895176

    申请日：2010-09-30

    申请人： Hung T. Du ,  Richard T. Walter

    发明人： Hung T. Du ,  Richard T. Walter

    IPC分类号： H02K1/04 ,  H02K15/00

    CPC分类号： H02K3/30 ,  H01R43/10 ,  H02K3/48 ,  H02K7/04 ,  H02K15/0056 ,  H02K15/02 ,  H02K15/12 ,  H02K15/165 ,  Y10T29/49009 ,  Y10T29/49011 ,  Y10T29/49012 ,  Y10T29/49071 ,  Y10T29/49073 ,  Y10T29/49075 ,  Y10T29/49995 ,  Y10T29/49996

    摘要： An electric motor has a stator in which an armature is disposed. The armature has a lamination stack having slots in which magnet wires are wound. An armature shaft extends coaxially through the lamination stack and a commutator is disposed on the armature shaft to which ends of the magnet wires are electrically coupled. The magnet wires are at least partially encased in thermally conductive plastic. When the thermally conductive plastic is molded, a balancing feature is formed of the thermally conductive plastic. In aspects, the balancing feature can include a layer of the plastic from which plastic can be removed during balancing; one or more balancing rings adjacent axial sides of the lamination stack from which plastic can be removed to balance the armature; or one or more balancing rings having one or more pockets therein in which one or more weights are disposed to balance the armature.

    摘要翻译： 电动机具有设置有电枢的定子。 电枢具有层叠叠层，其具有缠绕有电磁线的槽。 电枢轴同轴地延伸穿过层压叠层，并且换向器设置在电枢轴上，电磁线的端部电耦合到该电枢轴上。 磁线至少部分地被包裹在导热塑料中。 当导热塑料被模制时，由导热塑料形成平衡特征。 在一些方面，平衡特征可以包括塑料层，在平衡期间可以从其中去除塑料; 一个或多个邻近层压叠层的轴向侧面的平衡环，可以从该平面环移除塑料以平衡电枢; 或一个或多个在其中具有一个或多个凹穴的平衡环，其中设置一个或多个重物以平衡电枢。

    Motor With Permanent Magnets and Method of Manufacturing; Power Tool With Same
    10.
    发明申请
    Motor With Permanent Magnets and Method of Manufacturing; Power Tool With Same 有权
    永磁电机及制造方法; 电动工具一样

    公开(公告)号：US20100033036A1

    公开(公告)日：2010-02-11

    申请号：US12443191

    申请日：2007-10-12

    申请人： Earl M. Ortt ,  Hung T. Du ,  Sankarshan Murthy

    发明人： Earl M. Ortt ,  Hung T. Du ,  Sankarshan Murthy

    IPC分类号： H02K7/14 ,  H02K15/00 ,  H02K1/27 ,  H02K1/17

    CPC分类号： H02K1/17 ,  H02K1/2786 ,  H02K15/03 ,  H02K23/04 ,  Y10T29/49009

    摘要： An electric motor has a rotor and a stator. The rotor or the stator has arced permanent magnets that have essentially the same inner radius (IR) and outer radius (OR). In an aspect, the stator has a stator housing having a plurality of poles. Each pole includes a plurality of flat magnets affixed to an inner surface of the stator housing. In an aspect, flats on the outside of the stator housing key the stator assembly in a power tool housing. In an aspect, flat magnets are pre-magnetized, pre-assembled with alternating magnetic polarities, inserted into a stator housing, and remagnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets and unmagnetized magnets are pre-assembled with unmagnetized magnets between magnetized magnets, the pre-assembled magnets inserted into a stator housing, and the unmagnetized magnets magnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets are inserted between anchors inwardly extending from an inner surface of a stator housing with the anchors retaining each magnet placed in the stator housing between anchors from being angularly displaced by subsequently inserted magnets. In an aspect, pre-magnetized magnets are inserted in recesses in an inner surface of a stator housing with the recesses retaining each magnet placed in the stator housing between anchors from being angularly displaced by subsequently inserted magnets. In an aspect, each pole has at least three magnets, at least one of the magnets being thinner than the other magnets. In an aspect, the outer most magnets are made of magnetic material that is more resistant to demagnetization than at least one of the other magnets. In an aspect, the magnets of each pole are unevenly spaced over the pole In an aspect, a power tool includes such an electric motor.

    摘要翻译： 电动机具有转子和定子。 转子或定子具有具有基本相同的内半径（IR）和外半径（OR）的弧形永磁体。 在一方面，定子具有具有多个极的定子壳体。 每个极包括固定在定子壳体的内表面上的多个扁平磁体。 在一个方面，定子外壳外侧的平面将定子组件锁定在动力工具壳体中。 在一方面，扁平磁体被预先磁化，预先组装成具有交替的磁极性，插入定子壳体中，并且被重新磁化成最终期望的磁极性配置。 在一方面，预磁化磁体和非磁化磁体在磁化磁体之间预先组装有非磁化磁体，预组装的磁体插入定子壳体中，而磁化的磁体磁化到最终期望的磁极性结构。 在一个方面，预磁化的磁体被插入到从定子壳体的内表面向内延伸的锚固件之间，锚固件将放置在定子壳体中的每个磁体保持在锚固件之间，以便由随后插入的磁体进行角度位移。 在一方面，预磁化的磁体被插入定子壳体的内表面中的凹槽中，其中保持放置在定子壳体中的每个磁体的凹槽不会被随后插入的磁体角位移。 在一个方面，每个极具有至少三个磁体，至少一个磁体比其它磁体薄。 在一个方面，最外面的磁体由比其它磁体中的至少一个更能抵抗退磁的磁性材料制成。 在一方面，每个极的磁体在极点上不均匀地间隔开。在一个方面，电动工具包括这种电动机。