摘要
结合电气制动开关箱体在温升研究性试验中的异常发热现象,对工频大电流下铁磁性材料中的涡流损耗问题进行了深入的机理分析、数值计算和仿真研究,并提出了抑制涡流发热的有效措施。结果表明,降低箱体材料的磁导率及增大通流铜排与箱体的间距均可抑制箱体中的涡流发热,显著改善电气制动开关的温升性能。研究结果为大电流电气设备中的涡流抑制提供了思路和建议。
For the abnormal heating phenomenon of the electrical braking switch box in the temperature-risetest,this paper makes an in-depth mechanism analysis, numerical calculation and simulation study on the eddy current loss in ferromagnetic materials under the power-frequency and large current.Furthermore, the effective measures to suppress eddy current heating are proposed. The results show that decreasing the magnetic permeability of the box material and increasing the space between the flow copper bar and the box can restrain the eddy current heating in the box. The temperature-rise performance of the electric braking switch can be significantly improved. The results provide ideas and suggestions for eddy current suppression in large current electrical equipment.
作者
张震锋
陈蕾
吕军玲
常治国
ZHANG Zhenfeng;CHEN Lei;LV Junling;CHANG Zhiguo(Xi'an XD Switchgear Electric Co.,Ltd.,Xi'an 710077,China)
出处
《电气应用》
2022年第12期14-21,I0005,I0006,共10页
Electrotechnical Application
关键词
电气制动开关
大电流
温升
涡流发热
抑制措施
electric braking switch
large current
temperature rise
eddy current heating
suppression measures
作者简介
张震锋(1976-),男,高级工程师,从事断路器的研发工作。
