50 W Resonant SMPS with coreless transformer for AM radio application

Pezhman Nakhost, Stig Munk-Nielsen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

2 Citations (Scopus)


Resonant converters are attractive in some applications, because of their soft-switching behaviour. The very low switching losses make them superior compared to traditional hard-switching converters. The present paper considers a 50 W resonant SMPS with coreless transformer for AM radio applications above the AM band (1.7 MHz), to avoid switching disturbances and radio signal interferences, where a half-bridge LLC/LLCC resonant converter topology is designed and realized together with a resonant gate driver. In this connection it should be mentioned that this paper deals with an unknown area, since the authors could not find any papers published, regarding coreless transformer for above-mentioned applications. The entire converter is simulated using PSpice. A comparison between simulated and realized system has been made, which showed an excellent agreement of the system with only few percent deviation. The experimental tests show that the realized converter has a high performance and efficiency up to 87.6%. It is shown that with a DC input voltage range of 276-375 V, the output voltage is 15 V from 10 W to 50 W output power, except in no load. The output voltage ripple is 84 mVppand 114 mVppat 15 W and 50 W output power, respectively. In addition, ra switching frequency from 1.9 MHz up to around 4 MHz is possible.
Original languageEnglish
Title of host publication37th IEEE Power Electronics Specialists Conference, 2006. PESC '06
Number of pages7
PublisherIEEE Signal Processing Society
Publication date2006
ISBN (Print)0780397169
Publication statusPublished - 2006
EventPESC 2006 - Jeju, Korea, Republic of
Duration: 18 Jun 200622 Jun 2006
Conference number: 37


ConferencePESC 2006
Country/TerritoryKorea, Republic of


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