Invention Grant
US07974038B2 Servo writer with retract capacitor for generating a VCM driving current during a power failure
有权
具有收缩电容器的伺服写入器，用于在电源故障期间产生VCM驱动电流
- Patent Title: Servo writer with retract capacitor for generating a VCM driving current during a power failure
- Patent Title (中): 具有收缩电容器的伺服写入器，用于在电源故障期间产生VCM驱动电流
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Application No.: US11953266Application Date: 2007-12-10
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Publication No.: US07974038B2Publication Date: 2011-07-05
- Inventor: Puspanathan Krishnan , Anandan Vengadasalam
- Applicant: Puspanathan Krishnan , Anandan Vengadasalam
- Applicant Address: US CA Irvine
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA Irvine
- Main IPC: G11B5/54
- IPC: G11B5/54 ; G11B21/12
Abstract:
A servo writer is disclosed for writing servo data onto a disk of a disk drive. The servo writer comprises a push-pin operable to contact an actuator arm of the disk drive, an actuator for actuating the push pin, and a retract capacitor. The retract capacitor is charged, and the actuator actuates the push-pin in order to position the head radially over the disk. If a power failure occurs while actuating the push-pin, a current is applied from the retract capacitor to a voice coil of the actuator arm in order to retract the actuator arm.
Public/Granted literature
- US20090147396A1 SERVO WRITER WITH RETRACT CAPACITOR FOR GENERATING A VCM DRIVING CURRENT DURING A POWER FAILURE Public/Granted day:2009-06-11
Information query
IPC分类:
