Analysis of Nonlinear Dynamics in Linear Compressors Driven by Linear Motors

[摘要] The analysis of dynamic characteristics of the mechatronics system is of great significance for the linear motor design and control. Steady-state nonlinear response characteristics of a linear compressor are investigated theoretically based on the linearized and nonlinear models. First, the influence factors considering the nonlinear gas force load were analyzed. Then, a simple linearized model was set up to analyze the influence on the stroke and resonance frequency. Finally, the nonlinear model was set up to analyze the effects of piston mass, spring stiffness, driving force as an example of design parameter variation. The simulating results show that the stroke can be obtained by adjusting the excitation amplitude, frequency and other adjustments, the equilibrium position can be adjusted by adjusting the DC input, and to make the more efficient operation, the operating frequency must always equal to the resonance frequency.

[发布机构] Guangxi Power Grid Company Limited Electric Power Research Institute, Nanning; 530023, China^1

[效力级别] 无线电电子学

[关键词] Dynamic characteristics;Equilibrium positions;Excitation amplitudes;Linear motor design;Mechatronics systems;Non-linear response;Operating frequency;Resonance frequencies