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    • 6. 发明申请
    • SYSTEMS AND METHODS FOR CONTROLLING A DC MOTOR
    • 用于控制直流电动机的系统和方法
    • WO2008039183A1
    • 2008-04-03
    • PCT/US2006/037445
    • 2006-09-26
    • AGERE SYSTEMS INC.DAHLBERG, James A.WILSON, Ross W.BRENDEN, Jason P.
    • DAHLBERG, James A.WILSON, Ross W.BRENDEN, Jason P.
    • H02P1/18H02P3/00H02P3/08H04L27/28
    • H02P6/08H02P6/18H02P6/185H02P6/22H02P23/22
    • Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count (405), including a current in the plurality of phases in accordance with a first commutation state (415), and incrementing the count until the current achieves a threshold (420) in the first commutation state (415). Then, a current is induced in the plurality of phases in accordance with a second commutation state (430), and the count is decremented (447) until the current achieves the threshold in the second commutation state (430). The sign bit (455) of the count is stored, and a desired initial commutation state (470) is determined based at least in part on the sign bit (455) of the count.
    • 本文公开了用于控制DC电动机的各种系统和方法。 例如,一种方法用于控制多相无刷直流电动机。 该方法包括提供具有多个相位的DC电动机。 这样的直流电动机通过根据多个换向状态感应多相中的电流来进行工作。 在该示例中,讨论了六个换向状态,但是可能存在少于或多于六个换向状态。 该方法还包括根据第一换向状态(415)初始化包括多个相位中的电流的计数(405),并且增加计数直到电流达到第一换向状态(415)中的阈值(420) )。 然后,根据第二换向状态(430)在多个相位中感应出电流,并且计数减小(447)直到电流达到第二换向状态下的阈值(430)。 存储计数的符号位(455),并且至少部分地基于计数的符号位(455)来确定期望的初始换向状态(470)。