Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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绕组半匝结构引起的变压器磁芯过热案例分析

来源:电工电气发布时间:2020-12-19 11:19 浏览次数:702
绕组半匝结构引起的变压器磁芯过热案例分析
 
李海波1,孙涛1,尚博文2
(1 西安爱科赛博电气股份有限公司,陕西 西安 710119;2 西安交通大学 电气工程学院,陕西 西安 710049)
 
    摘 要:对一起直流开关电源中的高频变压器磁芯过热的原因进行了分析,在有限元软件中建立变压器模型,通过场路耦合的方法,对磁芯磁密、损耗进行仿真。仿真结果表明,变压器原边绕组分数匝结构是导致该起事故的主要原因。提出相应改进措施,经仿真和实际测试验证,绕组匝数取整后,解决了上述问题。
    关键词:开关电源;变压器;磁芯饱和;过热;原边绕组
    中图分类号:TM433     文献标识码:B     文章编号: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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