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    • 1. 发明申请
    • BRUSHLESS DC MOTOR WITH PERMANENT MAGNET ROTOR
    • 无刷直流电机与永磁电机
    • US20160329786A1
    • 2016-11-10
    • US15215730
    • 2016-07-21
    • Di WuVladislav Milchev StakevRobert F. Birkenstock, JR.
    • Di WuVladislav Milchev StakevRobert F. Birkenstock, JR.
    • H02K15/03H02K21/14H02K1/02
    • H02K15/03H02K1/02H02K1/2766H02K1/2773H02K1/28H02K21/14Y02E10/725Y10T29/49012
    • The brushless DC motor of the present invention comprises a permanent magnet rotor rotating coaxially with and inside of the stator containing the electric windings, separated by a radial, axially extending gap. The rotor can be formed of four or more permanent, e.g., ferrite ceramic magnets, spaced substantially equidistantly circumferentially around the rotor and extending radially along the axial length of the rotor. The preferred ferrite magnets are substantially corrosion resistant, and thus durable in the wet rotor environment, in which it may be used, sufficient to withstand the effects of even hot salt water. Preferably, four of the permanent magnets are bar magnets, i.e., rectangular in cross-section, extending radially and perpendicularly to the adjacent magnets. Most preferably, the bar magnets are separated by generally wedge-shaped, or quadrant-shaped, sections of magnetic material. The permanent magnets are polarized so that the north-south flux lines extend transversely to each adjacent magnet, most preferably forming a so-called Halbach Array. This brushless DC motor is especially useful for driving wet rotor pumps, wherein the particular combination of elements forming the rotor results in a highly efficient, effective and durable motor
    • 本发明的无刷直流电动机包括与包含电绕组的定子同轴地和内侧旋转的永磁体转子,其由径向的轴向延伸的间隙分开。 转子可以由四个或更多个永久的例如铁氧体陶瓷磁体形成,铁氧体陶瓷磁体基本上等距离地围绕转子周向间隔开并且沿转子的轴向长度径向延伸。 优选的铁氧体磁体基本上是耐腐蚀的,并且因此在可以使用的湿转子环境中是耐用的,足以承受甚至热盐水的影响。 优选地,四个永磁体是棒状磁体,即横截面矩形,径向地和垂直于相邻的磁体延伸。 最优选地,棒状磁体由磁性材料的大致楔形或四分之一形状的部分分开。 永磁体被极化,使得南北磁通线横向延伸到每个相邻的磁体,最优选地形成所谓的Halbach阵列。 该无刷直流电动机对于驱动湿式转子泵特别有用,其中形成转子的元件的特定组合产生高效,有效和耐用的电动机
    • 2. 发明申请
    • BRUSHLESS DC MOTOR WITH PERMANENT MAGNET ROTOR
    • 无刷直流电机与永磁电机
    • US20140111052A1
    • 2014-04-24
    • US13804129
    • 2013-03-14
    • Di WuVladislav Milchev StakevRobert F. Birkenstock, JR.
    • Di WuVladislav Milchev StakevRobert F. Birkenstock, JR.
    • H02K1/27H02K15/03H02K1/28
    • H02K15/03H02K1/02H02K1/2766H02K1/2773H02K1/28H02K21/14Y02E10/725Y10T29/49012
    • The brushless DC motor of the present invention comprises a permanent magnet rotor rotating coaxially with and inside of the stator containing the electric windings, separated by a radial, axially extending gap. The rotor can be formed of four or more permanent, e.g., ferrite ceramic magnets, spaced substantially equidistantly circumferentially around the rotor and extending radially along the axial length of the rotor. The preferred ferrite magnets are substantially corrosion resistant, and thus durable in the wet rotor environment, in which it may be used, sufficient to withstand the effects of even hot salt water. Preferably, four of the permanent magnets are bar magnets, i.e., rectangular in cross-section, extending radially and perpendicularly to the adjacent magnets. Most preferably, the bar magnets are separated by generally wedge-shaped, or quadrant-shaped, sections of magnetic material. The permanent magnets are polarized so that the north-south flux lines extend transversely to each adjacent magnet, most preferably forming a so-called Halbach Array. This brushless DC motor is especially useful for driving wet rotor pumps, wherein the particular combination of elements forming the rotor results in a highly efficient, effective and durable motor.
    • 本发明的无刷直流电动机包括与包含电绕组的定子同轴地和内侧旋转的永磁体转子,其由径向的轴向延伸的间隙分开。 转子可以由四个或更多个永久的例如铁氧体陶瓷磁体形成,铁氧体陶瓷磁体基本上等距离地围绕转子周向间隔开并且沿着转子的轴向长度径向延伸。 优选的铁氧体磁体基本上是耐腐蚀的,并且因此在可以使用的湿转子环境中是耐用的,足以承受甚至热盐水的影响。 优选地,四个永磁体是棒状磁体,即横截面矩形,径向地和垂直于相邻的磁体延伸。 最优选地,棒状磁体由磁性材料的大致楔形或四分之一形状的部分分开。 永磁体被极化,使得南北磁通线横向延伸到每个相邻的磁体,最优选地形成所谓的Halbach阵列。 该无刷直流电动机对于驱动湿转子泵特别有用,其中形成转子的元件的特定组合导致高效,有效和耐用的电动机。