Design and implementation of EMI filter for high frequency (MHz) power converters
2012 (English)In: IEEE International Symposium on Electromagnetic Compatibility, IEEE conference proceedings, 2012, Art. no. 6396738- p.Conference paper (Refereed)
The fabrication of emerging power semiconductor devices and high frequency PCB power transformers has made it possible to design the power converters in MHz switching frequency range. However, the higher switching frequency, di/dt loops and dv/dt nodes in power stages of these converters generate higher order harmonics which causes Electro Magnetic Interference (EMI). It is commonly believed that the EMI has worst affect in the converters switching in MHz frequency range than the converters operating below 150 kHz. Thus, it is important research direction to investigate the consequences of implementing a line filter to suppress the conducted EMI in high frequency power converters. In this paper, the measurements, and analysis of the conducted EMI in emerging power converters, switching in MHz frequency range, and the design of the filter for its suppression is presented. The design of LISN and its PCB implementation for EMI measurements is presented. The measurement of conducted EMI of a half bridge DC-DC converter switching at 3.45 MHz and the analysis of the frequency spectrum is discussed. The design, PCB implementation and characterization of the EMI filter and the measurement of the suppressed conducted noise by applying the filter are also discussed.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. Art. no. 6396738- p.
Electro Magnetic Compatibility; Electro Magnetic Interference; Line Impedance Stablization Network; Pulse Width Modulation
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:miun:diva-16527DOI: 10.1109/EMCEurope.2012.6396738ScopusID: 2-s2.0-84872565389Local ID: STCOAI: oai:DiVA.org:miun-16527DiVA: diva2:536143
International Symposium on Electromagnetic Compatibility, EMC EUROPE 2012;Rome;17 September 2012through21 September 2012;Code95036