发明授权
- 专利标题: Passive actuator for assisting commutational ramp loading
- 专利标题(中): 被动执行器用于协助通风斜坡加载
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申请号: US09577896申请日: 2000-05-24
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公开(公告)号: US06621651B1公开(公告)日: 2003-09-16
- 发明人: Ryan T. Ratliff , Curtis A. Trammell
- 申请人: Ryan T. Ratliff , Curtis A. Trammell
- 主分类号: G11B2102
- IPC分类号: G11B2102
摘要:
A disc drive includes a base and a voice coil magnet attached to the base. The voice coil magnet has a first portion for providing a magnetic field having a first direction and magnitude, and a second portion for providing a magnetic field having a second direction and magnitude. The voice coil magnet also has a transition zone between the first portion and the second portion of the voice coil magnet where the magnetic field from the first portion substantially cancels the magnetic field from the second portion of the voice coil magnet. The disc drive also includes an actuator assembly rotatably attached to base. The actuator assembly includes a yoke, and a voice coil attached to the yoke of the actuator. The voice coil is positioned within the magnetic field of the voice coil magnet such that passing a current through the voice coil generates a second magnetic field to position the actuator assembly. A ferromagnetic material is attached to the actuator assembly. The ferromagnetic material is positioned within the magnetic field of the voice coil magnet to induce a force from the magnetic field of the voice coil magnet to drive the actuator to a park position.
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