- 积分
- 627
- 回帖
- 0
- 西莫币
-
- 贡献
-
- 威望
-
- 存款
-
- 阅读权限
- 115
- 最后登录
- 1970-1-1
该用户从未签到
|
发表于 2021-10-25 23:53
|
显示全部楼层
来自: 美国
又见神论,集肤效应和邻近效应 (不是“临近”)就这么被您除名了。
转一个Wiki的解释
Proximity effect (electromagnetism)
A changing magnetic field will influence the distribution of an electric current flowing within an electrical conductor, by electromagnetic induction. When an alternating current (AC) flows through a conductor, it creates an associated alternating magnetic field around it. The alternating magnetic field induces eddy currents in adjacent conductors, altering the overall distribution of current flowing through them. The result is that the current is concentrated in the areas of the conductor farthest away from nearby conductors carrying current in the same direction.
The proximity effect can significantly increase the AC resistance of adjacent conductors when compared to its resistance to a DC current. The effect increases with frequency. At higher frequencies, the AC resistance of a conductor can easily exceed ten times its DC resistance.
|
|