大功率高压开关电源变压器的损耗分析及散热控制

文献标志码：A
文章编号：1672−7207(2019)05−1089−09
Loss analysis and thermal control of power transformers with high power and high voltage
HUANG Yi1, PENG Ke1, WANG Wenchao1, CHEN Lian1, DONG Mi2, SHAO Tian1, LEI Jiahao1
来源于绕组损耗和磁芯损耗；在自然冷风条件下，变压器散热情况较差，温升明显过高；采用本文所述方法所计
算的风量能有效控制变压器的温升；采用该方法也可得到不同负载条件下变压器的对应损耗及所导致的温升，进
一步达到调控温度的目的。
关键词：变压器；有限元分析；损耗特性；散热分析；散热控制
中图分类号：TH132.4
Abstract: In order to strengthen the reliability and stability of the switching power supply, the theoretical analysis and the simulation example verification for its transformer loss and temperature rise characteristics were studied, and a loss analysis and heat dissipation control method were proposed. Firstly, Ansoft Maxwell software was used to build a 3D model of the transformer to carry out the finite element analysis of the magnetic field. Secondly, the temperature rise and the air volume required for cooling under different loads were calculated, and the temperature field with Ansys software was compared. Finally, a 2 000 V/3 A load switching power supply module was used as an example to establish an actual model to verify the effectiveness of the thermal control. The results show that the loss of transformer in high-power and high-voltage switching power supply mainly comes from the winding loss and the core losses. Under natural cold wind conditions, the temperature rise is obviously high due to the poor performance of heat dissipation. Using the air volume results calculated by the analysis method described in this paper, the temperature rise of the transformer can be effectively controlled. This method can also be used to obtain the corresponding loss of the transformer under different load conditions and the resulting temperature rise, which can furtherly regulate the temperature. Key words: transformer; finite element analysis; loss characteristic; thermal analysis; thermal control
大功率高压开关电源变压器的损耗分析及散热控制
黄毅 1，彭可 1，王文潮 1，陈练 1，董密 2，邵添 1，雷佳豪 1
(1. 湖南师范大学 工程与设计学院，湖南 长沙，410081； 2. 中南大学 自动化学院，湖南 长沙，410083)
摘要：为了提高大功率高压开关电源的可靠性和稳定性，针对其变压器损耗与温升特性，进行理论分析和仿真实
第 50 卷第 5 期 2019 年 5 月
中南大学学报(自然科学版) Journal of Central South University (Science and Technology)
DOI: 10.11817/j.issn.1672-7207.2019.05.011
百度文库
Vol.50 No.5 May 2019
例验证，并提出一种损耗分析和散热控制方法。以 Ansoft Maxwell 软件建立变压器的 3D 模型，进行磁场的有限
元分析；计算不同负载条件下的温升情况及散热所需风量，通过 Ansys 软件对温度场进行分析；以 2 000 V/3 A
的开关电源模块为例，建立实际模型验证散热控制的有效性。研究结果表明：大功率高压开关电源的变压器损耗
(1. College of Engineering and Design, Hunan Normal University, Changsha 410081, China; 2. School of Automation, Central South University, Changsha 410083, China)