冷凍機用電動往復振動型圧縮機に関する動的挙動解析

抄録

In this study, analysis is conducted on behavior of an electromagnetic reciprocating vibratory swing compressor. The governing equations of the swing compressor is derived in terms of motions of piston with coil and motor assembly and current induced in the electric circuit. Electromagnetic coupling is also considered between the vibrations of a spring-piston system and the electric circuit which consists of a coil and a resistance. First, the analytical model is introduced with the vibration system with two degrees of freedom. The parameters such as spring constants, damping, and iron loss coefficients are obtained and identified by preliminary experiments. Time responses of motion and current of the swing compressor are calculated with direct time integration. Frequency responses of these variables are also obtained. Next, the numerical results are compared with the experimental results to verify the analysis presented in this study. The experiments were held under the condition without compressive load and that under compression of air as refrigerant. Very good agreements are found between numerical and experimental results in the condition without compressive load, which verify our analysis. Although, damping is uncertain and leakage of refrigerant is not considered in the analysis in the condition of air compression, the analysis agrees qualitatively with the experiment.