直线压缩机驱动电机功率因数的分析
李志海，郑水英，吴荣仁
(浙江大学化工机械研究所，浙江杭州310027)
摘要：为了确保电机具有高的功率因数和良好的工作性能，通过理论计算和实验研究分析了直线压缩机驱动电
机功率因数的几个重要影响因素，如角频率比、阻尼比.数学模型包含了机械系统，电磁系统以及压缩气体的热力学系统，为简化计算，对该模型进行了线性化处理.计算和实验结果显示，工作频率和阻尼比是最重要的影响因素.当电机T作频率位于机械系统共振频率附近时，功率因数具有极大值，随着阻尼比的增加，高功率因数区域变大.空载和带负载条件下的实验结果与理论分析基本一致。最高功率因数都在0 96以卜
美键词：直线压缩机;功率因数;直线电机}冰箱压缩机
中图分类号：TH457 文献标识码：A 文章编号：1008—973x(2007)08 1400—03
Power factor analysis of driving motor for linear compressor
LI Zhi—hal，ZHENG Shui—ying。WU Rong—ren
(Institute of Chemical Machinery，加ejiang University，Hangzhou 310027.China)
Abstract：Main effect factors on the power factor of driving motor used for linear compressor were analyzedto ensure high motor performance，including radian frequency ratio and damping ratio.Linear processingof the mathematical model describing mechanical system，electromagnetic system and thermodynamic system was carried OUt tO simplify the calculation.Calculation and experimental results showed that operatingfrequency and damping ratio were the most important effect factors;the maximum power factor was ob—tained when operating frequency was near the mechanical resonant frequency;high power factor sectionwas enlarged with increasing damping ratio.The experimental results agreed well with the analytical solutions when the piston was with load or without.All the highest power factors were above 0.96.
Key words：linear compressor;power factor;linear motor;refrigerator compressor
直线压缩机最初用于空间技术中的微型低温制冷机，目前已在多方面得到应用.韩国已经将其应用于制冷压缩机，开发r采用直线压缩机的D10s(deluxe，intelligent，optimum and silent)冰箱1 I.由于直线压缩机没有曲柄连杆机构，活塞受到的径向力和摩擦力都大大减小，压缩机的整体效率得到了提高，电机的效率达到了92%口]，直线压缩机效率比曲轴压缩机提高了20%oJ;另外直线压缩机活塞的行程随着输入电压的变化而变化，压缩机的启动和容量调节都很容易，因此电机频繁启动造成的启动损耗也相应减少.根据LG(Lucky Goldstar，目前是韩国第三大公司)的实验数据，300 I。的冰箱采用直线压缩机电能消耗总体可以减少25%口].
更多内容详见附件：资料下载
