Aiming at solving problems such as a lot of computation and simulation models of solenoid can't be used in the case of magnetic circuit saturation and test verification was't made, a whole system mathematical model including solenoid itself and two-stage return springs was established, and a simulation using Maxwell FEA software was made. An experiment was made with a real solenoid which corresponds to the simulation model, and the experiment current VS time curve and the simulation one were compared. The system's dynamic characteristics simulation curves including the winding current VS time&the electromagnetic force VS time were given in the case of magnetic circuit satura-tion, and detailed analyses of them were made. The concept of effect of solenoid generating electric power with the action of return springs af-ter solenoid being power off was put forward. The test result showes that the experiment current VS time curve and the simulation one coinci-ded with each other highly, which proves the accuracy of the simulation model and simulation curves and also indicates that this simulation model can be used in both cases of magnetic circuit unsaturation and saturation.%针对很多关于电磁铁的计算和仿真模型无法应用在磁路饱和的场合以及没有对仿真结果进行实验验证的问题,建立了包括电磁铁本体和两级回复弹簧在内的整个系统的数学模型,采用了Maxwell有限元分析软件进行了仿真.对相应仿真模型的电磁铁实物进行了实验,对比了实验电流-时间曲线和仿真电流-时间曲线.在磁路饱和的情况下,给出了包括电磁铁线圈电流-时间曲线、电磁力-时间曲线等在内的系统动态特性仿真曲线,详细解释了各曲线的含义,提出了在电磁铁断电后回复弹簧作用下的电磁铁发电效应的概念.实验结果表明:实验电流-时间曲线和仿真电流-时间曲线具有较高的吻合度,验证了仿真模型及仿真曲线的准确性,表明了仿真模型不仅适用于磁路不饱和情况,也适用于磁路饱和情况.
展开▼
