Dynamic characteristics simulation and experiment of solenoid with spring load
HUANG Xiao fan, TIAN Zhong tao, LIANG Hai tong
(Measurement & Control Department, China Academy of Aerospace Aerodynamics, Beijing 100074, China)

Abstract: Aiming at solving problems such as a lot of computation and simulation models of solenoid cant be used in the case of magnetic circuit saturation and test verification wast made, a whole system mathematical model including solenoid itself and two stage return springs was established, and a simulation using Maxwell FEA software was made. An experiment was made with a real solenoid which corresponds to the simulation model, and the experiment current VS time curve and the simulation one were compared. The system s dynamic characteristics simulation curves including the winding current VS time & the electromagnetic force VS time were given in the case of magnetic circuit saturation, and detailed analyses of them were made. The concept of effect of solenoid generating electric power with the action of return springs after solenoid being power off was put forward. The test result showes that the experiment current VS time curve and the simulation one coincided with each other highly, which proves the accuracy of the simulation model and simulation curves and also indicates that this simulation model can be used in both cases of magnetic circuit unsaturation and saturation.

Key words: solenoid; mathematical model; finite element analysis; dynamic characteristics