发明名称 |
Data storage device and actuator control method |
摘要 |
Embodiments of the invention prevent the magnetic head from dropping to the magnetic disk when it is retracted. If the power supply Vcc to the drive is interrupted, a power supply voltage detecting section detects that the power supply to the drive is interrupted. A control section sets switches to the ON state in order to discharge the charged retract capacitor and supply the discharge current to a voice coil. The control section retains the switches in the ON state for a period which is determined based on the discharge period specifying control data stored in a register and the count signal from a counter. A voice coil motor, to which the current is supplied, turns the actuator in the unloading direction to retract the actuator to the ramp.
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申请公布号 |
US2005078404(A1) |
申请公布日期 |
2005.04.14 |
申请号 |
US20040957011 |
申请日期 |
2004.09.30 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS, B.V. |
发明人 |
KURAMOTO KENICHI;KAWAKAMI TAKANORI |
分类号 |
G11B21/12;G11B5/54;G11B5/596;G11B21/02;(IPC1-7):G11B21/02 |
主分类号 |
G11B21/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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