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This paper describes the analysis and design of a DC-DC converter topology which is operational at frequencies in the Very High Frequency (VHF) band ranging from 30 MHz-300 MHz. The presented topology, which consists of a class E inverter, class E rectifier, and self-oscillating gate driver, is inherently resonant, and switching losses are greatly reduced by ensuring Zero Voltage Switching (ZVS) of...
Portable electronic devices, such as laptop computers and personal portable electronic devices are battery-powered and need power-electronics converters as an interface between the battery and the load. To ensure a long battery life, it is important that the power-electronic converters operate at high efficiency. The volume available for power electronics is limited which necessitates the use of integration...
This paper is focused on the high-voltage (ges2 kV) high-power (ges20 kW) isolated DC/DC converters for the rolling stock applications. The 3.3 kV IGBT based three-level half-bridge neutral point clamped (NPC) inverter topology was analyzed as an alternative to the two-level half-bridge with 6.5 kV IGBTs. The properties of primary switches, theirs selection procedure as well as inverter loss distribution...
This paper presents a new Power Electronic Building Block (PEBB) designed to facilitate the implementation of different power converter topologies. The proposed PEBB consists of two diodes and two transistors and it can be used to implement the most relevant power converter topologies, due to its modularity. The addition of the two diodes is an exclusive feature of the new PEBB, which permits to implement...
In this paper we are addressing power efficiency and output ripple of an embedded switched-capacitor based DC/DC Buck Converters. Here we propose to use current pump based switched-capacitor circuit in buck converter. The current pump circuit limits transition current of the switched-capacitors and hence, improves power efficiency and reduces output ripple. We have also proposed an equivalent macro...
This paper discusses the half- and full-bridge DC/DC converter topologies for high-power (200 kW) high-voltage (3.6 kV) applications. Focus is on the primary part of these topologies, i.e. the feasibility of two high-voltage IGBTs replacement in the full-bridge by two high-voltage film capacitors in the half-bridge.
This paper proposes a novel DC-DC converter: the DC-DC multilevel voltage multiplier (MVM). An Nx MVM can be built with two switches, 2N-2 diodes and 2N-2 capacitors, free of magnetic components. It is based on the multilevel converters principle and designed for unidirectional power transfer applications. Each device blocks one voltage level, then high voltage converters can be synthesized with low...
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