Invention Grant
- Patent Title: Method to eliminate current surge during spindle spin up
- Patent Title (中): 在主轴旋转时消除电流浪涌的方法
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Application No.: US12705444Application Date: 2010-02-12
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Publication No.: US08405332B1Publication Date: 2013-03-26
- Inventor: Ravishanker Krishnamoorthy , Foo Leng Leong
- Applicant: Ravishanker Krishnamoorthy , Foo Leng Leong
- Applicant Address: BM Hamilton
- Assignee: Marvell International Ltd.
- Current Assignee: Marvell International Ltd.
- Current Assignee Address: BM Hamilton
- Main IPC: H02H7/09
- IPC: H02H7/09

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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