Electromagnetic Design and Analysis of DC Solenoid Valve

Solenoid valves exhibit promising application prospects in both traditional industries and emerging fields, such as drones and robots. The electromagnetic design and analysis of solenoid valve are completed using the finite element method. Firstly, based on the equivalent magnetic circuit model, the working principle of the solenoid valve is introduced. According to the mathematical model, the electromagnetic force of solenoid valves and its influencing factors are discussed. The simulated and calculated magnetic field distribution shows that the magnetic saturation of the magnetic conductive shell is easy to occur, which is an important factor that affects the electromagnetic force. It is verified that the electromagnetic force is approximately inversely proportional to the square of the working displacement by the method of simulation and experiment, which is basically consistent with the theoretical analysis. According to the new design requirements, the two improved-schemes with small structural changes and low cost are proposed, whose computed results show that it is an effective method to enhance the electromagnetic force by increasing the cross-sectional area of the magnetic conductive shell for reducing the degree of magnetic saturation.