Least Mean Square Estimator for Motor Frequency Measurement Based on Linear Hall Sensor

선형 홀센서 기반의 모터 회전속도 측정을 위한 평균 최소 자승 추정기

  • 최가형 (연세대학교 전기전자공학과) ;
  • 나원상 (연세대학교 전기전자공학과) ;
  • 곽기석 (연세대학교 전기전자공학과) ;
  • 윤태성 (창원대학교 전기공학과) ;
  • 박진배 (연세대학교 전기전자공학과)
  • Published : 2008.05.01

Abstract

Motor frequency can be measured by a hall sensor. Among the many hall sensors, a linear type hall sensor is good at high accuracy frequency measuring problem. However, in general, this linear type hall sensor has DC offset which can vary along sensor's operating voltage change. Therefore, In motor frequency measurement problem using the linear hall sensor, it needs an estimator that can estimate frequency and DC offset simultaneously. In this paper, we propose the least mean square estimator to estimate motor frequency. To verify its performance, we compare the LMS estimator with a commercial analog tachometer. Experimental results shows the proposed LMS estimator works well in varying frequency and stationary DC offset.

Keywords

Hall sensor;Least mean square;Least square;DC offset;Frequency estimation

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