Efficiency measurement of linear oscillation motor with gas load

Article type: Research Article

Authors: Zou, Huiming^{a; b} | Zhang, Liqin^{a; b} | Peng, Guohong^{a; b} | Tian, Changqing^a

Affiliations: [a] Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China | [b] Graduate University of Chinese Academy of Sciences, Beijing 100190, P.R. China

Abstract: Linear oscillation motor (LOM) is the key assembly for a linear compressor, and its efficiency has great impact on the integral compressor performance. This paper presents a novel gas load method to measure the efficiency of LOM, analyses the effects of some main factors on the LOM efficiency in theory, and shows the efficiency test results. Different load conditions can be simulated by adjusting the discharge pressure of the gas and the load force presents nonlinear periodical curve. In the experiment, we changed the syntonic springs of the tested LOM to measure the LOM efficiency on different work conditions. The results of both theoretical analysis and experiment show that the LOM efficiency is the highest when the phase angle between current and displacement is 90°. While the springs stiffness coefficient is 54.44N/mm, the highest efficiency of the tested LOM is 85.97% on the condition that the discharge pressure is 0.25MPa. While the springs stiffness coefficient is 44.64N/mm the highest efficiency of the tested LOM is 84.67% on the condition that the discharge pressure is 0.4MPa. While the springs stiffness coefficient is 38.4N/mm the highest efficiency of the tested LOM is 78.35% on the condition that the discharge pressure is 0.5MPa.

Keywords: Linear oscillation motor, moving-magnet, linear compressor, efficiency measurement

DOI: 10.3233/JAE-2010-1304

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 34, no. 1-2, pp. 109-118, 2010