Based on the demagnetization effect,the mathematical calculation model of eddy current re-tarder was established,the magnetic induction intensity of closed magnetic circuit was calculated by eddy current conversion coefficient method,and the expression of electromagnetic braking torque of eddy current retarder was derived.Based on the existing products of an automotive braking system company,the circular pole was optimized as a fan-shaped pole,and Maxwell finite element simulation software was used to simulate the braking torque of the new type of eddy current retarder model with different lengths of fan-shaped pole.Finally,the new eddy current retarder was compared with the o-riginal product through finite element simulation and bench test.The results show that the braking torque of the new eddy current retarder is basically the same as that of the traditional eddy current re-tarder at different speeds,and the braking performance is obviously improved.The maximum error of simulation and test results is less than 5％,which proves the effectiveness of the new eddy current re-tarder and the correctness of optimization design.
eddy current retarderfan-shaped polebraking torque boostsimulationbench test
NETL
NSTL
维普
万方数据
