Analysis and mitigation of EMI in DC-DC converters using QR interaction

作者：Subramanian Archana^*; Govindarajan Uma

来源：IET Circuits, Devices and Systems, 2017, 11(4): 371-380.

DOI：10.1049/iet-cds.2016.0288

• DC-DC power convertors
• electromagnetic interference
• electric current control
• EMI
• QR interaction
• power equipment
• electromagnetic interference
• peak current mode controlled elementary DC-DC converters
• quasi resonant intrusion
• non-linear time varying model
• monodromy matrix
• Filippov method

DC-DC converters have led rapid development in electrical engineering owing to their virtuous assets in industrial field. Wide utilisation of power equipment in various arenas has led to stringent electromagnetic interference (EMI) and this issue is more common in DC-DC converters. In this study, a method has been put forward to mitigate EMI in peak current mode controlled elementary DC-DC converters by introducing quasi resonant (QR) intrusion. Results are demonstrated with time domain simulations which are attained from an exact non-linear time varying model developed without any quasi-static approximation. Stability analysis is performed using monodromy matrix based on Filippov's method. Experimental findings are found to agree well with simulation and arithmetical results, thereby confirming the qualitative and quantitative behaviour of the system for different parametric deviations. In addition, it is observed that the QR intrusion improves the stable operating regime and makes the converter electromagnetically compatible by mitigating the spurious signals.

• 出版日期2017-7