Transient Simulation Analysis of Electromagnetic Field and Temperature Field of High-frequency Transformer

被引：0
|
作者：
Liu J. [1 ]
Lü Y. [2 ]
Li L. [1 ]
Chen B. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
[2] State Grid Corporation of China, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 04期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Core loss; High-power high-frequency transformer; Magnetic field; Multiple physical fields; Temperature rise; Winding losses;
D O I：
10.13336/j.1003-6520.hve.20181206015
中图分类号：
学科分类号：
摘要：
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 transient3D 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 3D temperature distribution. Moreover, two prototypes of 5 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. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1191 / 1200
页数：9
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