Design And Simulation Of Proportional Solenoid In High-Pressure Common Rail System

Taking the high-speed proportional solenoid for the high-pressure common rail system as the research object. By using the basic law of magnetic circuit and the three basic equations of the solenoid, analyzed the suction calculation formula and established the dynamic and static characteristics mathematical model of the proportional solenoid. The proportional solenoid was designed by using the experience design formulas, according to the initial results of the design, The finite element model is established in ANSYS Maxwell software, and the related static magnetic field analysis and transient magnetic field analysis were carried out. According to the results of the analysis and multi-index orthogonal test, proposed a optimization scheme of the key structure parameters. The simulation and design of proportional solenoid by experience design and finite element method not only effectively improved the characteristics of the solenoid, but also provided a reference for the design and research of other solenoid.Firstly, using the basic law of magnetic circuit and the principle of similarity between magnetic circuit and electric circuit, established the equivalent magnetic circuit model of the proportional solenoid. On the basis of the three basic equations, the mathematical model of the dynamic characteristic of the proportional solenoid were derived. The block diagram of the system transfer function and transfer function under the condition of no load were given.Secondly, based on the theory of electromagnetism, kinematics and design of electromagnet, the proportional electromagnet were designed by the method of experience design, and the structure parameters of the proportional electromagnet were obtained.Then, the finite element model were established by using finite element software ANSYS Maxwell. The influence of the key parameters of the proportional electromagnet on the static characteristic of the force displacement curve were obtained through parametric simulation. The transient simulation model were established. The related motion parameters and the dynamic response time of the iron core were obtained by the transient field analysis.Finally, the orthogonal test of three factors and four levels of the proportional electromagnet were designed, through the analysis of variance of the orthogonal table and the comparative analysis of the multiple parameters. The optimal combination of the electromagnet parameters were obtained:the up side separated magnetic angle of 35 degrees, the core diameter 21mm, the nonmagnetic ring’s position 4.5mm. The static characteristics of the optimized proportional solenoid model were analyzed, the superior force-displacement characteristic curve were obtained.