Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Modeling of an Inductive Position Sensing System based on a Magnetic Circuit and its Analysis

자기 회로를 이용한 인덕턴스형 변위 측정 시스템의 모델링 및 해석

  • Choi, Dong-June (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Rim, Chun-Taek (Agency for Defense Development) ;
  • Kim, Su-Hyeon (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • Published : 2001.06.01
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Abstract

This paper presents modeling of an inductive micro position sensing system and its analysis. The parameters affected the system response are excitation frequency, turn ratio, input position, air-gap size, load resistance, and geometric dimensions. To analyze the system, we try to establish a modeling based on an equivalent magnetic circuit with permeances. The model is verified by the experimental results from 1 kHz to 20 kHz. The magnetic circuit model is well fitted to the experimental data except a little error due to LC resonance in the large turn-ratio system. Modeling enables us to theoretically approach the response characteristics. Based on the magnetic circuit model, system parameters can be selected in such a way to obtain the required characteristics such as high sensitivity, good linearity, or small size.

Keywords

References

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