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In order to enhance the power density of power factor correction (PFC) converters, an integrated structure for both electromagnetic interference filter and boost inductors is presented with flexible multilayer foil integration technique. The electromagnetic analysis of the proposed structure is given, and the calculations of the circuit parameters are provided. A prototype of 1-kW PFC converter has...
This paper presents a novel start-up scheme for the modular multilevel converter. Firstly a charging process model is introduced and the process of the proposed start-up scheme is presented. Then the maximum current and current-time formula during the charging process is derived. The mathematical solution of the formulas is used to compare with the results from a three-phase simulation using Matlab/Simulink...
A two phase ZVS full-bridge converter with a novel hybrid current doubler rectifier structure is proposed in this paper. With the proposed topology, the secondary windings of the transformers work in series when the input voltage is low but in parallel when the input voltage is high. The diode stress on the second winding is reduced and the interleaving operation reduces the current ripple in the...
In this paper, four types control methods have been proposed for buck-boost cascade topology. This converter used in hybrid electric vehicle can step the battery voltage level either up or down. The target is to find the most appropriate control method for the converter with certain specifications. Critical conduction mode control, fixed frequency control, the buck/boost control and the buck + boost...
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