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http://dx.doi.org/10.5050/KSNVN.2006.16.1.050

Ramp Load/Unload Velocity Control of VCM Using BEMF in HDD  

Jeong, Jun (연세대 정보저장기기 연구센터)
Kim, Tae-Soo (특허청 기계금속심사국)
Kang, Tae-Sik (삼성전자 스토리지사업부)
Jung, Kwang-Jo (삼성전자 스토리지사업부)
Lee, Chul-Woo (삼성전자 스토리지사업부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.1, 2006 , pp. 50-56 More about this Journal
Abstract
Since most of small form-factor drives have a load/unload mechanism and the flying height of the head is getting lower as the capacity of disk drives increases, the load/unload velocity becomes one of the important factors to ensure the reliability of the load/unload mechanism. To control the load/unload velocity accurately, velocity sensing is essential. In this paper, we introduce a very practical method that acquires the load/unload velocity from the back electromotive force (BEMF) of a voice coil motor (VCM) and propose a calibration method for measuring the BEMF from a given circuit. Moreover, the effect of calibration error and temperature variation on the measurement of BEMF is shown by simulation. Then, this present method is applied to the load/unload velocity controller and is verified from the experimental result.
Keywords
Velocity Control; BEMF; Ramp; Load/Unload; HDD;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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