摘要
电力电子电路中的高频开关管会在电路回路中产生高di/dt电流,其会对相邻近的回路产生严重的磁场干扰,破坏电路的正常工作,尤其是在布线愈加紧凑的印刷电路板(PCB)上。为了减小PCB上导线间的磁场干扰,对回路间耦合系数表达式进行分析,抽取出特征量,矩形回路间距离d与线圈l_(1)长度a_(1)之比d/a_(1)、两回路面积之比A_(2)/A_(1)以及两回路中心偏移夹角α,再利用有限元分析方法,分析PCB上矩形回路之间的耦合系数k与各特征量的关系。并且通过MATLAB对仿真数据进行分析,得到耦合系数k与(d/a_(1),A_(2)/A_(1),α)的关系曲线,据此分析提出减小PCB电路回路之间磁场干扰的准则。最后,通过实验进行了验证,为PCB上电路回路的参数设置提供了依据。
The high frequency switch tube in the power electronic circuit will generate high di/dt current in the circuit loop,which will cause serious magnetic field interference to the adjacent loop and destroy the normal operation of the circuit,especially on the PCB with compact wiring.In order to reduce the magnetic field interference between the wires on the PCB,the article analyzes the coupling coefficient expression between the loops and extracts the characteristic quantities:the ratio of the distance d between the rectangular loops to the length a_(1) of the coil l_(1)—d/a_(1),the ratio of the area of the two loops—A_(2)/A_(1),and the center offset angle of the two loops α.And then the paper uses the finite element analysis method to analyze the relationship between the coupling coefficient kand each characteristic quantity.Morever,by analyzing the simulation data through MATLAB,the relationship curve between the coupling coefficient k and(d/a_(1),A_(2)/A_(1),α)is obtained,and the criterion to reduce the magnetic field interference between the PCB circuit loops is proposed basing on it.Finally,it is verified through experiments,which provides a basis for the parameter setting of the circuit loop on the PCB.
作者
袁义生
兰梦罗
刘文钦
Yuan Yisheng;Lan Mengluo;Liu Wenqin(East China Jiaotong University,Nanchang 330013,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2021年第8期175-183,共9页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(52067007)资助项目。
关键词
磁场干扰
耦合系数
矩形回路
有限元分析
Magnetic field interference
Coupling coefficient
Rectangular loop
Finite element analysis
