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发明授权
US09343102B1 Data storage device employing a phase offset to generate power from a spindle motor during a power failure 有权
在电源故障期间采用相位偏移从主轴电机产生功率的数据存储装置

Data storage device employing a phase offset to generate power from a spindle motor during a power failure
摘要：
A data storage device is disclosed comprising a disk, a spindle motor configured to rotate the disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings are commutated based on a commutation sequence while applying a periodic driving voltage to each winding, wherein the periodic driving voltage comprises an operating amplitude during normal operation. When a supply voltage falls below a threshold, the spindle motor is configured into a power generator by at least adjusting a phase of the periodic driving voltage by a phase offset and adjusting the amplitude of the periodic driving voltage based on the phase offset.
摘要（中）：

公开了一种数据存储装置，包括盘，被配置为旋转盘的主轴马达，其中主轴马达包括多个绕组，以及在盘上致动的头。 在对每个绕组施加周期性驱动电压的同时，基于换向序列对绕组进行整流，其中周期性驱动电压在正常操作期间包括工作幅度。 当电源电压低于阈值时，主轴电动机通过相位偏移至少调整周期性驱动电压的相位并基于相位偏移来调节周期性驱动电压的幅度来配置成发电机。

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