Invention Grant
- Patent Title: Retracting an actuator
- Patent Title (中): 缩回执行器
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Application No.: US13718082Application Date: 2012-12-18
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Publication No.: US08730613B1Publication Date: 2014-05-20
- Inventor: Shuang Quan Min , June Christian Ang , Tze Ming Jimmy Pang , Kian Keongh Ooi , Paul E. Dienstbier
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: HolzerIPLaw, PC
- Main IPC: G11B21/12
- IPC: G11B21/12

Abstract:
An apparatus and associated methodology for retracting a first member in relation to a second member. The first member may be selectively moveable by a first motor and the second member may be selectively moveable by a second motor that operably generates a back electromagnetic force (BEMF) voltage VBEMF. In an embodiment a retract control circuit may control movement of the first member via the first motor in response to a loss of supply power to the second motor. An embodiment of the apparatus may include a backup power source storing a voltage VB after the loss of supply power. Another embodiment of the apparatus may include retract logic operative on the retract control circuit to divide the VB from the VBEMF to energize the first motor by the VBEMF and not the VB when the VB is greater than a predetermined threshold voltage and a loss of the supply power to the second motor is detected.
Information query
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