| 袁义生,兰梦罗,刘文钦.电力电子电路 PCB 中回路间的磁场干扰研究[J].电子测量与仪器学报,2021,35(8):175-183 |
| 电力电子电路 PCB 中回路间的磁场干扰研究 |
| Research on inter-loop magnetic field interferencein power electronic circuit PCB |
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| DOI： |
| 中文关键词: 磁场干扰 耦合系数 矩形回路 有限元分析 |
| 英文关键词:Magnetic field interference Coupling coefficient Rectangular loop Finite element analysis |
| 基金项目:国家自然科学基金（52067007）资助项目 |
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| 中文摘要: |
| 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 a1 之比 d / a1 、两回路面积之比 A2
/ A1 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 / a1 ,A2
/ A1 ,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。 |
| 英文摘要: |
| 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 a1
of the coil l
1—d / a1 , the ratio of the area of the two loops—A2
/ A1 , 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 / a1 , A2
/ A1 , 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. |
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