Optimal design and analysis of magnetic circuit for giant magnetostrictive force sensing actuator
Taking the giant magnetostrictive force sensing actuator as the research object,based on the theory of magnetostriction and eddy current loss,the COMSOL finite element software is used for magnetic field analysis,and the influence law of the parameters of the magnetizer on the magnetic flux density and eddy current is systematically studied.In order to increase the magnetic flux density and reduce the eddy current loss,the uniformity of the magnetic flux density on the central axis of the giant magnetostrictive rod is used as the evaluation standard,and the parameters of the magnetizer is optimized and it is partitioned and insulated.Comparing the experimental results under static and dynamic magnetic fields with those without optimization,result shows that the mean value of optimized magnetic flux density in the static magnetic field is increased by 0.016 1 T,and the uniformity is increased by 4.5％;in a dynamic magnetic field,partitioned insulation can effectively reduce eddy current loss,and the sensitivity of the optimized force sensor is increased by 5.76％.
giant magnetostrictive actuatoreddy current lossmagnetic circuit optinizationpartitioned insulationfinite element simulation
NETL
NSTL
万方数据
维普
