摘要
通过控制三端双向可控硅的导通时间来控制活塞位移的方法,建立了动磁直线电机驱动的压缩机的机械系统、热力系统及电磁系统数学模型.用该模型分析了压缩机的动态性能,得出了不同导通时间的电机线圈电压、电流及活塞行程和上死点位置.结果表明:仿真与实验结果吻合较好,表明该模型是行之有效的,控制及求解方法是正确的.由于考虑了等效阻尼系数的可变性、电机参数的准确性及算法对仿真结果的影响,使得仿真与实验结果误差小于10%,完全可以满足工程设计的需求.该模型具有可靠性好、准确性高、应用方便等特点,为压缩机系统参数的优化设计提供了新的途径,可以作为设计开发直线压缩机的一个有效工具.
The mathematical models of mechanical system, thermodynamic system and electromagnetic system of a compressor driven by moving-magnet linear motor were established on the basis of the control method that piston＇s displacement is changed by changing the triac＇s time of flow. The dynamic performance of the linear compressor was simulated. The voltage and current curves of the motor coil, and the stroke and top dead center of the piston were presented at different time of flow. The simulation results are in good agreement with experimental data. Considering influence of equivalent damping coefficient＇s changeability, motor parameter＇s veracity and algorithm, the deviation of the simulation results from the experimental data is less than 10%.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2007年第7期820-824,共5页
Journal of Xi'an Jiaotong University
关键词
压缩机
动磁直线电机
仿真
数学模型
导通时间
compressor
moving-magnet linear motor
simulation
mathematical model
time of flow
