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In this paper a novel multilevel voltage source inverter topology is proposed for high power applications requiring expensive switching component such as, traditional Silicon, and/or newly-evolving Silicon Carbide, and/or Gallium Nitride based power semiconductor transistors. This multilevel voltage source inverter consists of several series connected newly developed single phase two transistor H-Bridge...
Paralleling power converters is a common practice in industries to enhance total power rating, reliability, and availability of the system. In case of fault occurring in systems with parallel converters, the faulty power converter can be isolated and the system can still be operated at reduced power level. In this paper, a grid-connected power converter consisting of two parallel H-bridge converter,...
High efficiency and minimum components of the interleaved micro-inverter make them popular in industry. In this paper, a micro-inverter is designed for a 240 W panel in which a high speed MPPT algorithm is implemented in order to keep the reliability of the control system. Moreover, the associated control system is completely described. An optimizing method is applied to the interleaved micro-inverter,...
Flying capacitor based multilevel PWM converter may be an attractive choice due to the natural balancing property of the capacitor voltages. Previous research on natural balancing of a 4-level H-bridge Flying Capacitor Converter (FCC) with Phase Shifted (PS) PWM showed slow natural balancing rate for small modulation indices. Theoretical natural balancing time constant becomes infinitely large for...
One major research topic in the PFC rectifiers area is represented by efficiency improving methods, while maintaining the unity power factor. The investigated topologies in this paper are the single stage versus interleaved eight-switch rectifiers topologies with or without considering the DC-link diodes. For the eight-switch rectifier a new control strategy is proposed in [8]. The proposed interleaved...
Increasing power demand due to further electrification of internal combustion engine vehicles has taken the 12V power supply to its limits. Therefore, some major automobile manufacturers including Audi, BMW, Daimler, Porsche and Volkswagen have agreed to implement a new two voltage-level network. A starter-generator, which may optionally assist acceleration and recuperate energy during braking, is...
High-frequency isolated DC-DC converters are gaining momentum in applications where the demand of isolation matches with that one of compact and light equipment. A seminal topology, constituted by two bridges operating at high frequency and coupled by a transformer, has emerged as an attractive solution that fulfills the above-mentioned demands. The two most popular versions of such a topology are...
An increased research effort on the topic of unity-power-factor rectifiers has been lately noticed. In this paper two highly efficient three-phase buck-type unity power factor rectifiers are proposed to be studied: the conventional six-switch (single-stage) and its two-stage version, referred as the interleaved six-switch solution. They are in here compared in terms of efficiency and performances...
In this paper, phase-shifted pulse width modulation full bridge topologies which are capable of switching at zero voltage are evaluated. Eight examples of these topologies have been studied in detail and compared in different aspects. After a detailed investigation, it has been decided to use zero voltage switching with current doubler and synchronous rectifier phase-shifted pulse width modulation...
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