Research On Modeling Simulation And Performance Of High Speed Electromagnetic Valve Based On Magnetic Network

High-speed electromagnetic valve is the key control component of electronic fuel injection system.Its strong electromagnetic force and rapid response characteristics directly affect the control accuracy of the fuel injection and the flexible injection law.Therefore,improving the static and dynamic characteristics of high-speed electromagnet valves is of great significance for fuel injection.In this paper,a permanent magnet high-speed electromagnet valve with low power consumption,strong electromagnetic force and high response characteristics is taken as the research object,the magnetic network model is established and the static performance and dynamic performance research is carried out.Firstly,the magnetic network analysis method is expounded.Considering the leakage magnetic flux and edge effect of the system,the static magnetic network model of the conventional high-speed electromagnet valve and the permanent magnet high-speed electromagnet valve is established,and the Steffensen accelerated iteration method is used to solve the problem.Based on the static model,combined with the circuit sub-model and the mechanical motion sub-model,the fourth-order Runge-Kutta differential equation method is used to create a dynamic mathematical model of the permanent magnet high-speed electromagnet valve.Using MATLAB platform to develop high-speed electromagnetic valve magnetic network simulation analysis software,the software's architecture and magnetic network core calculation solution flow are expounded,the flow of magnetic network analysis software is explained,and the static and dynamic response of the electromagnetic valve is verified by the test and test platform.Comparing the test results to verify the accuracy of the simulation model,the static electromagnetic force error obtained by the magnetic network method and the test is about 5.1%,and the maximum error of the dynamic simulation model is 4.3%,which proves that the model can achieve both calculation accuracy and speed.The high-speed electromagnet valve magnetic network model is used to study the static and dynamic characteristics of permanent magnet high-speed electromagnet valves.The static characteristics mainly select the research parameters such as the main magnetic pole radius,the armature thickness,coil turns,the working air gap and the height of the permanent magnet ring,revealing the electromagnetic force output of the high-speed electromagnet valve and thevariation of the magnetic flux characteristics of each part.For the study of the dynamic characteristics of the permanent magnet high-speed electromagnet valve,it is concluded that the driving voltage,spring preload,the permanent magnet height and the residual air gap have an influence on the dynamic response of the high-speed electromagnet valve,which needs to be considered comprehensively.It provides theoretical support for improving the dynamic performance stability of permanent magnet high-speed electromagnet valve,and has important theoretical significance and practical value for improving the performance of electronically controlled fuel injection system.