한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)

한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
권호 표지

램프 로드/언로드 HDD의 역기전력을 이용한 VCM 속도 제어

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

  • 정준 (삼성전자 스토리지 사업부) ;
  • 강태식 (삼성전자 스토리지 사업부) ;
  • 김태수 (삼성전자 스토리지 사업부) ;
  • 정광조 (삼성전자 스토리지 사업부) ;
  • 이철우 (삼성전자 스토리지 사업부)
  • 발행 : 2004.05.01
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초록

Nowadays, most small form-factor drives adapt a load/unload mechanism and the flying height of the head becomes more and more low. So, the load/unload velocity also becomes one of the important factors to ensure the reliability of the load/unload operation. To control the load/unload velocity accurately, velocity sensing is most important because there is no special velocity sensor during the load/unload operation. In this paper, we proposed a very practical method that measures the velocity from the BEMF voltage of a VCM. Then, the proposed method is applied to the load/unload velocity control using 2.5' drives in order to verify its usefulness.

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