Promotion of Electronic Product Performance by Optimizing PCB

Linna Wang, Yi Hu, Jinglu Zhang

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(12C) 634-640

Department of Electronic Technology, BEIJING POLYTECHNIC, 100016, China

Aiming at the problem of electromagnetic interference exceeding in switching power supply compatibility experiment of electronic system, and combined with the design example of LLC half bridge resonance switch power supply, this paper put forward the optimum design method of PCB electromagnetic compatibility. By taking switching power supply as research object, it firstly analyzed the effect of electromagnetic interference on PCB electromagnetic compatibility. Based on method of field circuit combination, PCB simulation model was established so as to analyze the PCB electromagnetic compatibility of switching power supply. Next, according to the figure of PCB surface current and the near field distribution of electromagnetic field, and based on optimization design process of PCB electromagnetic compatibility, valid rectification measures was taken so as to improve PCB design and enhance PCB electromagnetic compatibility. At last, the simulation results showed that electromagnetic field intensity has widely reduced, which verified the reasonability of the improvement of PCB in design phase.