Reliability optimization design of electromagnetic proportional directional valve

摘要

© 2018 AMSE Press. All rights reserved.Insufficient electromagnetic force and too high temperature rise to burnout the coil are the typical faults of the electromagnetic proportional directional valve. The simplified model used in traditional analysis method has poor accuracy. In this paper, the magnetic field distribution of the valve is modeled and analyzed by using the finite element method. Magnetic force is calculated based on the virtual displacement principle. In addition, the influence laws of the geometry and parameters acting on electromagnetic force are taken into consideration in order to model the coil temperature field of the valve. The influence of coil control current and heat transfer coefficient on the temperature rise of coil is analyzed, which provides a theoretical basis for the reliability optimization design of electromagnetic proportional directional valve.