Invention Grant
US07728539B2 Methods and apparatuses for measuring VCM BEMF at a VCM control update rate
有权
用VCM控制更新速率测量VCM BEMF的方法和装置
- Patent Title: Methods and apparatuses for measuring VCM BEMF at a VCM control update rate
- Patent Title (中): 用VCM控制更新速率测量VCM BEMF的方法和装置
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Application No.: US11750839Application Date: 2007-05-18
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Publication No.: US07728539B2Publication Date: 2010-06-01
- Inventor: Craig Smith , Stan Shepherd , Xin Yang , Yu Sun
- Applicant: Craig Smith , Stan Shepherd , Xin Yang , Yu Sun
- Applicant Address: US CA Scotts Valley
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Scotts Valley
- Agency: McCarthy Law Group
- Main IPC: H02P6/18
- IPC: H02P6/18
Abstract:
Devices and methods for performing dynamic sampling of a back electromotive force (BEMF) measurement are provided. A device has hardware, including a voice coil motor (VCM) for receiving a VCM command signal and a correction circuit, for obtaining the VCM command signal and a coil voltage measurement from the hardware, where the correction circuit removes a transient voltage measurement due to a change in the VCM command signal from the coil voltage measurement and outputs an estimated BEMF measurement.
Public/Granted literature
- US20080007271A1 METHODS AND APPARATUSES FOR MEASURING VCM BEMF AT A VCM CONTROL UPDATE RATE Public/Granted day:2008-01-10
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