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    • 10. 发明授权
    • Electric motor assembly with movable rotor segments to reduce back electromotive force
    • 具有可动转子节段的电动机组件以减少反电动势
    • US08562471B2
    • 2013-10-22
    • US13086524
    • 2011-04-14
    • Peter J. SavagianAlan G. HolmesMark A. Theobald
    • Peter J. SavagianAlan G. HolmesMark A. Theobald
    • F16H48/06
    • H02K21/029
    • An electric motor assembly includes a rotor hub, and a rotor supported on the rotor hub. The rotor hub has first and second hub portions, and the rotor has first and second annular rotor segments supported for rotation on the respective first and second hub portions. Each of the rotor segments has a respective set of magnets spaced circumferentially therearound. The rotor hub and the rotor segments are configured so that at least one of the rotor segments moves about the axis of rotation relative to the other of the rotor segments as the rotor hub rotates. The movement of the at least one of the rotor segments is an amount that increases as the speed of the rotor hub increases to reduce back electromotive force. The movement may be due to centrifugal force, which increases as speed increases, without requiring a control system to effect the movement.
    • 电动机组件包括转子毂和支撑在转子毂上的转子。 转子毂具有第一和第二毂部分,并且转子具有第一和第二环形转子段,该第一和第二环形转子段被支撑以在相应的第一和第二轮毂​​部分上旋转。 每个转子段具有围绕其周向间隔开的相应组的磁体。 转子毂和转子段被构造成使得当转子轮毂旋转时,至少一个转子段相对于转子段中的另一个围绕转动轴线移动。 转子段中的至少一个的移动量随着转子毂的速度增加而增加,以减小反向电动势。 该运动可能是由于离心力,其随着速度的增加而增加,而不需要控制系统来实现运动。