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THIS paper explores opportunities and challenges in power conversion in the VHF frequency range of 30-300 MHz. The scaling of magnetic component size with frequency is investigated, and it is shown that substantial miniaturization is possible with increased frequencies even considering material and heat transfer limitations. Likewise, dramatic frequency increases are possible with existing and emerging...
Cascaded filters offer a possibility to minimize the size of the filter components due to their increased attenuation at high frequencies. A cost optimized design of a cascaded filter of a multi-phase converter for an automotive energy backup system will be shown, that results in small values of the inductances. However, the decreasing inductance values results in increasing current ripples in the...
The paper proposes a robust resonant ignition technique for low frequency square wave (LFSW) ballasts without requiring additional igniter components or increase in component size or weight. The LC filter of the LFSW ballast is used at start-up in a resonant mode for lamp ignition. In order to achieve the high voltage gain required for lamp ignition, significantly higher current and volt-seconds are...
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