Parameter Identification and Error Analysis of Approximation method for Linear motors

리니어 모터의 매개변수 추정과 근사화의 오차 분석

  • Nam, Jae-Wu (Dept. of Electrical and Computer Engineering, University of Seoul) ;
  • Oh, Joon-Tae (Dept. of Electrical and Computer Engineering, University of Seoul) ;
  • Kim, Gyu-Sik (Dept. of Electrical and Computer Engineering, University of Seoul)
  • 남재우 (서울시립대학교 전자전기컴퓨터공학부) ;
  • 오준태 (서울시립대학교 전자전기컴퓨터공학부) ;
  • 김규식 (서울시립대학교 전자전기컴퓨터공학부)
  • Received : 2012.05.26
  • Accepted : 2012.06.30
  • Published : 2012.07.25

Abstract

In this paper, a closed-loop sensorless stroke control system for a linear compressor has been designed. In order to estimate the piston position accurately, motor parameters are identified as a function of the piston position and the motor current. These parameters are stored in ROM table and used later for the accurate estimation of piston position. The identified motor parameters are approximated to the several surface functions in order to decrease memory size. They can also be divided into 2 or 4 subsections to decrease identification errors. The effect of the order of surface functions and division of subsections on identification errors and computation time is analyzed.

Acknowledgement

Supported by : 한국연구재단

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