一种永磁高速电磁阀的涡流损耗研究

Research on Eddy-Current Loss of a Permanent Magnet High-Speed Solenoid Valve

建立了永磁高速电磁阀电、磁、机多物理场仿真模型,有、无涡流下分析表明,无涡流情况下永磁高速电磁阀开启响应时间和关闭响应时间分别减少13.8%和31.0%.动态响应研究表明:涡流损耗主要集中在衔铁吸合和复位阶段,分别占涡流总损耗的74.1%和18.4%,并且得出涡流分布情况,在铁芯、永磁体和衔铁处涡流损耗量分别占总涡流损耗量的86.4%、8.1%和5.5%.通过对永磁高速电磁阀材料分析,得出涡流损耗与材料的电导率呈正相关,磁饱和强度与电导率呈负相关,材料通过影响电磁阀中的涡流损耗和磁饱和强度进而影响电磁阀的动态特性.

The electrical,magnetic and mechanical multi-physics simulation model of a permanent magnet highspeed solenoid valve was established.The analysis with or without eddy current shows that the opening response time and the closing response time of the permanent magnet high-speed solenoid valve are reduced by 13.8%and 31.0%,respectively.The investigation on dynamic response indicates that the eddy-current loss mainly concentrates on the pull-in and reset stage of the armature which accounts for 74.1%and 18.4%of the total eddy-current loss.Moreover,the distribution of eddy current was obtained.The eddy-current loss at iron core,permanent magnet and armature accounts for 86.4%,8.1%and 5.5%of the total eddy-current loss,respectively.Through the analysis on the material of permanent magnet high-speed solenoid valve,it is found that the eddy-current loss positively correlates with the conductivity of the material and the magnetic saturation intensity negatively correlates with the conductivity.In addition,the material affects the dynamic characteristics of the solenoid valve by affecting the eddy-current loss and magnetic saturation intensity in the solenoid valve.