Invention Grant
US08405332B1 Method to eliminate current surge during spindle spin up 有权
在主轴旋转时消除电流浪涌的方法

Method to eliminate current surge during spindle spin up
Abstract:
Systems, methods and computer program products for reducing or removing current spikes generated during a current recirculation period associated with phase switching in a spindle motor are described. In some implementations, the duty cycle of the drive signals applied to the windings of the spindle motor can be adjusted to reduce or eliminate the current surge resulting from current recirculation. In some implementations, the duty cycle of the drive signals during spin-up can be reduced based on a current limit, and the reduced duty cycle can then be used to drive the spindle motor taking into account of current surges in the supply current.
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