Sensorless control for linear compressors

Issue title: ICMIT'03

Article type: Research Article

Authors: Sung, Ji Won^a | Lee, Chel Woong^a | Kim, Gyu-Sik^b | Lipo, T.A.^c | Won, Chung-Yuen^d | Choi, Sewan^e

Affiliations: [a] Digital Appliance Research Laboratory, LG Electronics Inc., Korea. E-mail: jwsung@lge.com | [b] Department of Electrical Engineering, The University of Seoul, Korea. E-mail: gskim318@uos.ac.kr | [c] Department of ECE, University of Wisconsin, USA. E-mail: lipo@engr.wisc.edu | [d] School of Information & Communation Engineering, SungKyunKwan University, Korea. E-mail: won@yurim.skku.ac.kr | [e] Department of Contr. and Instru. Engineering, Seoul National University of Techlogy, Korea. E-mail: schoi@snut.ac.kr

Abstract: A closed-loop sensorless stroke control system for a linear compressor has been designed. The motor parameters are identified as a function of the piston position and the motor current. They are stored in ROM table and used later for the accurate estimation of piston position. Also it was attempted to approximate the identified motor parameters to the 2nd-order surface functions. Some experimental results are given in order to show the feasibility of the proposed control schemes for linear compressors.

Keywords: Sensorless stroke control, linear compressor, identified motor parameters

DOI: 10.3233/JAE-2006-811

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 24, no. 3-4, pp. 273-286, 2006