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This paper presents a novel control methodology that enables DCM/CCM Boundary PFC Boost converter operating in voltage mode to draw ideally a sinusoidal current from the power line also when techniques that maximize system efficiency especially at medium-light load are implemented (e.g. “valley skipping” operation to limit the converter switching frequency). It is a well-known fact that in these systems...
In this paper, a bridgeless Sepic AC/DC converter is proposed. The absence of an input rectifier bridge can reduce the conduction loss and the proposed topology separates the input PFC current and output current, which reduces the switch current stress and improves system thermal management compared with the traditional Sepic converter. In addition, the switches in the proposed topology all have semi-soft...
Wireless charger for Electric Vehicles (EVs) is an off-line application and it needs power factor correction (PFC) function, which usually consists of a front-end boost PFC and a cascaded DC/DC converter. Recently, Z-source resonant converter (ZSRC), a single-stage solution with low cost and high efficiency, was proposed for EV wireless charger. Combining with the Z-source network, the control scheme...
This work analyzes different options to implement low power consumption in Switching Mode Power Supplies (SMPSs) with Power Factor Correction (PFC) when they are in standby mode. The standard SMPSs for power levels higher than 100 W are made up of two stages: a classical PFC stage based on a Boost Converter operating in the Continuous Conduction Mode and a second stage based on any type of isolated...
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