Abstract:The transient magnetic field of a cylindrical magnetic coupling was numerically simulated to obtain the influencing rules of speed, containment can material andslip angle on eddy current loss in magnetic couplings. It was shown that the eddy current loss increasesin several folds with increasing rotational speed, at 3 000 r/min, for example, it was about 24 times that at 500 r/min. Additionally, the loss depends on the conductivity of containment can material. The conductivity of titanium plate TP340 is 1.65 times that of 304SS, as a result, the eddy current loss of TP340 is 1.61 times that of 304SS.In one magnetic pole period, a 1°slip angle increase leads to an about1% eddy current loss rise. The experimental results showed thatthe ratio of the eddy current loss in the containment canof 304SS at 3 000 r/min to that at 500 r/min is 23.0, while the ratio is 24.6 in the containment canof TP340. The eddy current loss is decreased with decreasing coupling length, especially at high speeds. When the coupling length is decreased by 10 mm, the eddy current loss is decreased by 3.6% at 500 r/min.The eddy current loss is decreased by about 10% at 3 000 r/min. Compared the experimental results, the numerically simulated eddy current lossesare consistent with the former.
汪家琼,*,王凯,孙静如,赵瑞杰,童凯,柏宇星. 磁力联轴器涡流损失的数值计算与试验[J]. 排灌机械工程学报, 2020, 38(3): 230-235.
WANG Jiaqiong,*,WANG Kai,SUN Jingru,ZHAO Ruijie,TONG Kai,BAI Yuxing. Numerical analysis and experiment on eddy current loss in amagnetic coupling. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(3): 230-235.