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    • 4. 发明授权
    • Variable frequency reduced speed variation electric drive
    • 变频减速变速电驱动
    • US07952316B2
    • 2011-05-31
    • US11868329
    • 2007-10-05
    • Evgeni GanevCuong V. NguyenThomas M. MacRunnelLeroy A. Fizer
    • Evgeni GanevCuong V. NguyenThomas M. MacRunnelLeroy A. Fizer
    • H02P1/38H02P27/00
    • H02P25/22
    • A multiple-winding induction machine may be used to obtain a reduced-speed-variation electric drive when using a variable-frequency power distribution system. Each winding may have a different number of poles. The winding with the smallest number of poles may operate the machine at the lowest bus frequency, while the winding with the largest number of poles may operate the machine at the highest bus frequency. In one embodiment, a third winding, with a middle number of poles, may operate the machine at the middle frequency ranges. The speed of the induction machine is a function of the electrical frequency and the number of the winding poles. Therefore, the operating speed range can be reduced by switching from one winding to another. According to the present invention, windings with different numbers of poles can be designed to achieve different reductions in speed variation.
    • 当使用可变频率配电系统时,可以使用多绕组感应电机来获得减速变速电驱动。 每个绕组可能具有不同数量的极点。 具有最小极数的绕组可以在最低总线频率下操作机器,而具有最大极数的绕组可以以最高总线频率操作机器。 在一个实施例中,具有中数极数的第三绕组可以在中频范围操作机器。 感应电机的速度是电频率和绕组极数的函数。 因此,可以通过从一个绕组切换到另一个绕组来减小工作速度范围。 根据本发明,可以设计具有不同极数的绕组,以实现速度变化的不同降低。
    • 6. 发明申请
    • VARIABLE FREQUENCY REDUCED SPEED VARIATION ELECTRIC DRIVE
    • 可变频率减速变速电驱动
    • US20080265828A1
    • 2008-10-30
    • US11868329
    • 2007-10-05
    • EVGENI GANEVCuong V. NguyenThomas M. MacRunnelLeroy A. Fizer
    • EVGENI GANEVCuong V. NguyenThomas M. MacRunnelLeroy A. Fizer
    • H02P25/20
    • H02P25/22
    • A multiple-winding induction machine may be used to obtain a reduced-speed-variation electric drive when using a variable-frequency power distribution system. Each winding may have a different number of poles. The winding with the smallest number of poles may operate the machine at the lowest bus frequency, while the winding with the largest number of poles may operate the machine at the highest bus frequency. In one embodiment, a third winding, with a middle number of poles, may operate the machine at the middle frequency ranges. The speed of the induction machine is a function of the electrical frequency and the number of the winding poles. Therefore, the operating speed range can be reduced by switching from one winding to another. According to the present invention, windings with different numbers of poles can be designed to achieve different reductions in speed variation.
    • 当使用可变频率配电系统时,可以使用多绕组感应电机来获得减速变速电驱动。 每个绕组可能具有不同数量的极点。 具有最小极数的绕组可以在最低总线频率下操作机器,而具有最大极数的绕组可以以最高总线频率操作机器。 在一个实施例中,具有中间极数的第三绕组可以在中频范围操作机器。 感应电机的速度是电频率和绕组极数的函数。 因此,可以通过从一个绕组切换到另一个绕组来减小工作速度范围。 根据本发明,可以设计具有不同极数的绕组,以实现速度变化的不同降低。