摘要
基于等效电路原理,建立了自由活塞式线性压缩机电磁-机械-声耦合模型,推导了模型中等效气体刚度与等效气体阻尼的近似表达式。通过迭代程序修正了模型中最大位移的输出偏差。同时借助电磁有限元软件,将气动耦合模型与电动机电磁模型相互匹配,搭建了线性压缩机联合仿真平台,模拟了不同负载条件下压缩机电磁参数和动力特性的瞬态变化规律。通过不同充气压力下的扫频实验,验证了计算结果和耦合模型的准确性。
Based on the principle of equivalent circuit,a coupled model of free piston linear compressor on electromagnetic,mechanics and acoustics was built and the approximate expressions of equivalent gas stiffness and damping in this model were obtained. The deviation of maximum displacement was corrected by iterating program. Using FA software,the simulation platform was built to integrate the pneumatic coupled model and electromagnetic one. The transient changing of electromagnetic parameters and pneumatic characteristics under different load conditions was simulated for the modeling compressor. The simulating results and coupled model were verified through sweeping frequency experiments under different charging pressure.
出处
《低温工程》
CAS
CSCD
北大核心
2015年第6期37-42,共6页
Cryogenics
关键词
自由活塞
线性压缩机
耦合模型
仿真平台
扫频实验
free piston
linear compressor
coupled model
simulation platform
sweeping frequency experiment
