繞組半匝結構引起的變壓器磁芯過熱案例分析
李海波1,孫濤1,尚博文2
(1 西安愛科賽博電氣股份有限公司,陜西 西安 710119;2 西安交通大學 電氣工程學院,陜西 西安 710049)
摘 要:對一起直流開關電源中的高頻變壓器磁芯過熱的原因進行了分析,在有限元軟件中建立變壓器模型,通過場路耦合的方法,對磁芯磁密、損耗進行仿真。仿真結果表明,變壓器原邊繞組分數匝結構是導致該起事故的主要原因。提出相應改進措施,經仿真和實際測試驗證,繞組匝數取整后,解決了上述問題。
關鍵詞:開關電源;變壓器;磁芯飽和;過熱;原邊繞組
中圖分類號:TM433 文獻標識碼:B 文章編號:1007-3175(2020)12-0035-04
The Analysis of Transformer Core Overheat Caused by Half Turn Structure of Winding
LI Hai-bo1, SUN Tao1, SHANG Bo-wen2
(1 Xi'an ACTIONPOWER Electric Co.,Ltd, Xi'an 710119 , China;
2 College of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China)
Abstract: In this paper the reason for the overheating of a high-frequency transformer core in a DC switching power supply was analyzed. The transformer model is established in the finite element software, and the magnetic core density and loss are simulated by the method of fieldcircuit coupling. The simulation results show that the fractional turn structure of the primary winding of the transformer is the main cause of the accident. Corresponding improvement measures are put forward, and the problems above are solved after the number of winding turns is rounded after verification by simulation and actual test.
Key words: switching power supply; transformer; saturation of core; overheat; primary winding
參考文獻
[1] 張純亞,何林,章治國. 開關電源技術發展綜述[J].微電子學,2016,46(2):255-260.
[2] 畢超,肖飛,謝楨,陳明.DC-DC開關電源的建模與控制設計[J]. 電源技術,2014,38(2):359-362.
[3] 肖湘源,陳盛才. 大功率雙向DCDC變流器的設計與軌道交通應用[J]. 技術與市場,2017,24(3):58.
[4] 阮新波,嚴仰光. 脈寬調制的DC/DC全橋變換器的軟開關技術[M]. 北京:科學出版社,1999.
[5] 寧朝輝,陳松云,徐紫風,鄢忠權,邸林濤,馬旭. 具有導線滿匝繞制的分數匝線餅的連續式線圈研究[J]. 電工技術,2019(14):17-19.
[6] 趙修科. 實用電源技術手冊( 磁性元器件分冊)[K].沈陽:遼寧科學技術出版社,2002.