摘要
针对传统电力变压器风冷散热设计方法难以满足大容量中频变压器散热需求的问题,首先基于中压大容量DC/DC变流器拓扑及其移相控制PWM方式,讨论了非正弦供电中频变压器的铜耗、铁耗计算方法;然后,基于损耗平均分布的原则提出非正弦供电大容量中频箔绕式变压器散热气道设计方法,进行散热风道的精细设计,实现了变压器各发热体的良好散热,并进行了有限元仿真及温升试验。试验结果表明:绕组气道平均风速达到12.6m/s,绕组温升49K(温升限值85K),验证了该散热气道设计方法的有效性。
In order to solve the problem that traditional design method of air-coding structure for po-wer transformer can not meet the temperature-rise requirement of the high medium frequency transformer,based on the topology of high power medium voltage DC/DC converter and its phase-shift PWM control,this paper analyzes the copper and core loss for the MFT with non-sinusoidal exciting.Then a design method of air-cooling structure for the high power MFT is presented to achieve balance temperature distribution.The proposed design method is proved effective by the simulation and expe-riment results.According to the experiment results,the mean air speed reaches to 12.6 m/s,and the temperature rise of windings is 49 K which is much lower than the upper limit 85 K.
作者
王瑞田
肖飞
范学鑫
张新生
熊又星
WANG Rui-tian;XIAO Fei;FAN Xue-xin;ZHANG Xin-sheng;XIONG You-xing(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval Univ.of Engineering,Wuhan 430033,China)
出处
《海军工程大学学报》
CAS
北大核心
2018年第2期29-33,65,共6页
Journal of Naval University of Engineering
基金
国家自然科学基金资助项目(51477180)
国家重点基础研究发展计划资助项目(2013CB035601)
关键词
变压器
中频
散热
非正弦
铜耗
transformer
medium frequency
cooling
non-sinusoidal power supply
copper loss
