发明授权
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
- 专利标题： Methods and apparatuses for measuring VCM BEMF at a VCM control update rate
- 专利标题（中）： 用VCM控制更新速率测量VCM BEMF的方法和装置
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申请号： US11750839申请日： 2007-05-18
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公开(公告)号： US07728539B2公开(公告)日： 2010-06-01
- 发明人: Craig Smith , Stan Shepherd , Xin Yang , Yu Sun
- 申请人： Craig Smith , Stan Shepherd , Xin Yang , Yu Sun
- 申请人地址： US CA Scotts Valley
- 专利权人： Seagate Technology LLC
- 当前专利权人： Seagate Technology LLC
- 当前专利权人地址： US CA Scotts Valley
- 代理机构： McCarthy Law Group
- 主分类号： H02P6/18
- IPC分类号： H02P6/18
摘要：
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.