繞組半匝結(jié)構(gòu)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(xué) 電氣工程學(xué)院,陜西 西安 710049)
摘 要:對(duì)一起直流開關(guān)電源中的高頻變壓器磁芯過熱的原因進(jìn)行了分析,在有限元軟件中建立變壓器模型,通過場(chǎng)路耦合的方法,對(duì)磁芯磁密、損耗進(jìn)行仿真。仿真結(jié)果表明,變壓器原邊繞組分?jǐn)?shù)匝結(jié)構(gòu)是導(dǎo)致該起事故的主要原因。提出相應(yīng)改進(jìn)措施,經(jīng)仿真和實(shí)際測(cè)試驗(yàn)證,繞組匝數(shù)取整后,解決了上述問題。
關(guān)鍵詞:開關(guān)電源;變壓器;磁芯飽和;過熱;原邊繞組
中圖分類號(hào):TM433 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):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
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