比例电磁铁是控制比例阀先导级阀芯动作的电磁驱动元件，其性能在很大程度上决定比例阀的整体性能。针对传统比例电磁铁线性度差、比例范围短、隔磁环安装困难等不足，设计一种新型结构的比例电磁铁，这种比例电磁铁采用永磁体与线圈产生的复合磁场力驱动衔铁运动，同时新型结构的比例电磁铁中取消传统比例电磁铁的隔磁环结构，降低加工难度并且具有较传统的比例电磁铁更好的性能。对设计的新型电磁铁进行数学建模和理论分析验证其理论的可行性，并且对同等尺寸的比例电磁铁进行仿真优化设计，获得尺寸条件限制下的性能最佳的比例电磁铁设计。在理论分析的基础上，通过对样机的电磁力测试获得的试验数据与理论分析数据一致，验证了这种新型结构的比例电磁铁的实用性。

Proportional solenoid is the driving devices electromagnetic to control the action of the proportional valve. The overall performance of the proportional solenoid is largely determined by this part. The traditional solenoids have the following disadvantages. The linearity of the solenoid is poor. The effective stroke is short. And the barrier magnetic is installed difficulty. In view of the above the shortcomings, a new structure of the linear force solenoid is presented. The composite magnetic force generated by the permanent magnets and electromagnetic field is using to drive the armature. The barrier magnetic in the new solenoid is canceled, so the solenoid can assemble easily. Theoretical analysis and finite element simulation is done for its design optimization in this paper. One prototype is designed and manufactured, and the designed structure is verified by experiment.