Eddy-current effects in slot-bound conductors
Eddy-current effects in slot-bound conductors
复制标题
槽缝导体中的涡流效应
DOI：
10.1049/ip-epa:19951700
复制
发表时间：
1995
影响因子：
4.4
通讯作者：
W. Peake
中科院分区：
文献类型：
--
作者：
D. Hanselman;W. Peake
在大多数电机中，载流导体出现在一个或多个区域的槽中。形成槽的高渗透性材料聚焦于导体中的电流所产生的磁场。随着激励频率的增加，这种聚焦磁场增加了导体的电阻，降低了导体的电感。尽管这一现象已有近一个世纪的历史，并导致了独立绝缘绞合导线(如Litz导线)的使用，但多圈缝隙约束导线的电阻和电感的解析表达式尚未见报道。对这些表达式进行了推导和分析。结果表明，缝隙阻力随缝隙深度的平方而增大。给出了实验结果，证实了所开发的表达式中注意到的趋势。
In most electrical machines, current-carrying conductors appear in slots in one or more areas. The highly permeable material into which the slots are formed focuses the magnetic field generated by current flow in the conductors. This focused field increases the resistance and decreases the inductance of the conductors as the frequency of excitation increases. Although this phenomenon has been known for approximately a century and has led to the use of individually insulated stranded conductors (e.g. Litz wire), analytic resistance and inductance expressions for multi-turn, slot-bound conductors have not been reported. These expressions are developed and analysed. It is shown that the slot resistance increases with the square of the slot depth. Experimental results are presented which confirm the trends noted in the expressions developed.