Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Development of an Inductive Proximity Sensor in Active Magnetic Bearing System for Magnetically Suspended Centrifugal Blood Pumps

능동 자기 베어링 방식의 자기 부상 원심성 혈액 펌프를 위한 유도성 근접 센서 개발

  • Kim, H.I. (Interdisciplinary Program, Biomedical Engineering Major, Graduate School, Seoul National University) ;
  • Kim, H.C. (Department of Biomedical Engineering, College of Medicine, Seoul National University)
  • 김형일 (서울대학교 대학원 협동과정 의용생체공학) ;
  • 김희찬 (서울대학교 의과대학 의공학교실)
  • Published : 1998.11.20
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Abstract

AMB(Active Magnetic Bearing) systems are popularly used in various areas. In biomedical engineering applications it is a key part of magnetically suspended rotary blood pumps. The special advantage of AMBs is that they enable the rotor to revolve with no physical contact and provide rotary blood pumps with better performances such as low hemolysis level. Fundamentally, AMB systems consist of three parts, proximity sensors for distance detection, microprocessor for control algorithm and power amplifiers for actuating electromagnets. We have developed an inductive type proximity sensor with satisfactory characteristics that can be used in AMB systems. Frequency response was flat at least up to 10 kHz and sensitivity, resolution$(>5{\mu}m)$ and sensing range(<5mm) of the sensor could be adjustable for various purposes. The characteristics of the completed model showed to have satisfactory behaviors compared with the commercially available ones that already appeared to have reliable behaviors in AMB systems.

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