采用氮化铝材料的水冷变压器的热管理方法

doi:10.19595/j.cnki.1000-6753.tces.231685

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摘要

干式高频变压器通常结构紧凑且损耗突出,而低导热系数的灌封材料使得热量易在变压器内部累积,从而导致温升成为大功率变压器容量与功率密度提升的限制因素。该文以环形水冷变压器为研究对象,建立了考虑中心圆柱热阻的变压器集总参数热路模型,并通过有限元仿真验证了所建模型的准确性。基于所建热路模型,解释了随着水流量的提高变压器温度降幅趋于稳定的现象。为了进一步增强散热效果,该文提出了一种基于高导热绝缘材料氮化铝的新型散热结构。该结构在热源与水冷板之间建立起低热阻通道,增强了变压器与水冷板之间的传热,变压器容量和功率密度可进一步提高。最后,通过有限元仿真与25 kHz/160 kV·A高频变压器样机实验验证了所提散热结构的有效性。

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	查晓明

关键词 ：大容量高频变压器, 环形水冷变压器, 等效热路模型, 氮化铝材料

Abstract：

Dry-type high-frequency transformers usually have compact structures and prominent losses. The potting materials with low thermal conductivity allow heat to accumulate inside the large-capacity transformer, which causes temperature rise to become a limiting factor in increasing the power density of high-frequency transformers. Due to the significant advantages of toroidal cores and water-cooling heat dissipation method, this paper focuses on the thermal management issue of toroidal water-cooling transformers.

收稿日期: 2023-10-12

PACS:

TM433

基金资助:

国家自然科学基金资助项目（52177191）

通讯作者: 宫金武男,1981年生,副教授,博士生导师,研究方向为高效率高功率密度电力电子变换技术、宽禁带半导体器件应用、电能质量分析与治理。E-mail：gongjinwu@whu.edu.cn

作者简介: 王开国男,1998年生,硕士研究生,研究方向为大功率高频变压器精细化设计。E-mail：wangkaiguo@whu.edu.cn

引用本文:

王开国, 宫金武, 石子帅, 田杰, 潘尚智, 查晓明. 采用氮化铝材料的水冷变压器的热管理方法[J]. 电工技术学报, 0, (): 231685-231685. Wang Kaiguo, Gong Jinwu, Shi Zishuai, Tian Jie, Pan Shangzhi, Zha Xiaoming. Thermal Management Method for Toroidal Water-Cooling Transformer Using Aluminum Nitride Material. Transactions of China Electrotechnical Society, 0, (): 231685-231685.

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