Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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A study on the Characteristics of linear compressor drive systems

선형 압축기 구동시스템 특성에 관한 연구

  • Ahn J.R. (Dept. of Electrical Eng., Univ. of Ulsan) ;
  • Chun T.W. (Dept. of Electrical Eng., Univ. of Ulsan) ;
  • Lee H.H. (Dept. of Electrical Eng., Univ. of Ulsan) ;
  • Kim H.G. (Dept. of Electrical Eng., Univ of Kyungbook) ;
  • Nho E.C. (Dept. of Electrical Eng., Univ. of Pukyong)
  • 안정렬 (울산대학교 전기전자정보시스템공학부) ;
  • 전태원 (울산대학교 전기전자정보시스템공학부) ;
  • 이홍희 (울산대학교 전기전자정보시스템공학부) ;
  • 김흥근 (경북대학교 전자전기공학부) ;
  • 노의철 (부경대학교 전기공학과)
  • Published : 2003.07.01
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Abstract

A reciprocating compressor with a rotary motor used in a refrigerator has low efficiency, because it has the large mechanical losses due to the crank mechanism. The linear compressor which has the free piston driven by a linear motor, was developed to increase the efficiency of compressor by reducing mechanical losses. The TRIAC has been widely used for controlling the piston, because it has simple structure. However, as it is able to control only stator voltage, it is very difficult to obtain good efficiency. Recently, PWM inverter which is able to control the voltage as well as the frequency, is applied to linear compressor drive system to overcome above problem. In this paper, the variations for efficiency and power factor of linear compressor are investigated by changing both the mechanical resonant frequency and electrical resonant frequency of linear compressor, and also the inverter frequency The optimum relationships between both resonant frequencies and the inverter frequency is derived in order to obtain the maximum efficiency and also good power factor.

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