新型永磁高速电磁阀能量转换特性

Energy Conversion Characteristics of a Novel Permanent Magnet High-Speed Solenoid Valve

针对一种加永磁复合磁路高速电磁阀,建立永磁高速电磁阀下电、磁及机械运动的有限元仿真模型,并通过试验验证了电磁阀动态响应的吸合响应时间误差为4%,释放响应时间误差为4.1%,驱动电流和位移曲线试验值与仿真值也具有较好的一致性;通过仿真和分析开展高速电磁阀动态特性下能量转换研究,得出电磁阀各工作阶段的能量转换关系及分布规律.结果表明:在衔铁吸合触动阶段,输入系统的能量有37.0%转换成磁场储能来影响电磁阀开启响应特性;在衔铁吸合运动阶段,有25.3%的能量转换为涡流损耗,仅有10.4%能量转换为系统机械能,而系统机械能的变化影响电磁阀衔铁吸合运动阶段动态响应特性;在维持阶段,输入系统的能量有62.1%转换成焦耳热;在衔铁复位触动阶段,磁场储能释放的能量有78.5%转换成涡流损耗;在衔铁复位运动阶段,磁场储能与势能有44.1%转换成涡流损耗.

A finite element simulation model of the electric,magnetic and mechanical motion of a new type of permanent magnet high-speed solenoid valve was established.Compared with the experimental result,the modelling result presents about 4%errors in pull-in response time and the release response time.In addition,the simulation results of driving current and displacement curves are in good agreement with the experimental results.Through simulation and analysis,the energy conversion relationship and distribution law of each working stage of the solenoid valve were revealed.The results show that at the stage of armature pull-in actuation,37.0%of the input system energy are converted into magnetic field energy storage to affect the response of solenoid valve.In armature pull-in movement stage,25.3%energy are converted to eddy current loss,and only 10.4%energy are converted to system mechanical energy.The change of the mechanical energy of the system affects the dynamic response characteristics of the armature in the movement stage.In the armature pull-in maintenance stage,62.1%of the input system energy are converted into thermal energy.In the stage of armature reset actuation,78.5%of the energy released by magnetic field energy storage are converted into eddy current loss.In the stage of armature reset movement,44.1%of the magnetic field energy and potential energy are converted into eddy current loss.