高电压技术2019，Vol.45Issue(4)：1191-1200,10.DOI:10.13336/j.1003-6520.hve.20181206015
高频变压器磁场和温度场的瞬态特性分析
Transient Simulation Analysis of Electromagnetic Field and Temperature Field of High-frequency Transformer
摘要
Abstract
Accurate estimation of the copper losses and magnetic core losses of high-frequency transformers under non-sinusoidal voltage magnetization and analysis of the temperature-rise property of transformers under normal conditions are essential for the optimization design and heat dissipation design of the high-power high-frequency transformer (HFT). Firstly, taking the non-sinusoidal excitation waveform of HFT in normal mode into account, we simulated the transient3 D magnetic field distribution of HFT based on the InfolyticaMagNet software. Then, utilizing the measured magnetization curve and core loss characteristics, we calculated the losses of windings and core of the HFT. Finally, the obtained loss was applied in ThermNet to calculate the transient 3 D temperature distribution. Moreover, two prototypes of5 kHz/10 kW nanocrystalline-based HFTs with shell and core type topologies were designed and manufactured. Using the above method, the magnetic field, loss, and temperature were calculated. The results show that the deviation between the simulated and measured losses is within 15％. The maximum temperature of core and shell type prototypes under the natural cooling are 104℃ and 108℃, respectively. The heat dissipation characteristic of shell type topology is superior to that of the core type. And a method of heat dissipation is put forward for the optimization design of high-power high-frequency transformer.关键词
大功率高频变压器/铁芯损耗/绕组损耗/多物理场/磁场/温升特性Key words
high-power high-frequency transformer/core loss/winding losses/multiple physical fields/magnetic field/temperature rise引用本文复制引用
刘洁苇,吕运强,李琳,陈彬..高频变压器磁场和温度场的瞬态特性分析[J].高电压技术,2019,45(4):1191-1200,10.基金项目
国家重点研发计划 (2017YFB0903904) （2017YFB0903904）
国家自然科学基金 (51677064) （51677064）
