Examinando por Autor "Grbovic, Petar J."

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Quantum Mode Series Resonant Converter Utilized as Active Voltage Regulator of a Split DC Bus Capacitor
(Institute of Electrical and Electronics Engineers, 2023-11-13) Lopusina, Igor; Bouvier, Yann E.; Grbovic, Petar J.
Certain modern power electronics systems require active regulation of the split DC bus capacitor voltages. The series resonant converter is suitable to be utilized as an active voltage regulator, due to its ability to operate with soft switching, and hence, with high efficiency. In discontinuous conduction mode, the series resonant converter operates with a constant unity voltage gain, thus achieving balancing of the DC link. However, discontinuous conduction mode does not provide means for achieving a different voltage distribution, which is important in many scenarios. On the other hand, by operating in quantum mode (i.e. type 2 discontinuous conduction mode), the voltages across DC bus capacitor can be regulated. Therefore, the modeling of the quantum mode series resonant converter connected across split DC bus is presented in this paper. The steady-state operation as well as transient behavior are discussed and experimentally verified on a laboratory prototype.
Steady-State and Transient Modeling of the Series Resonant Balancing Converter
(Institute of Electrical and Electronics Engineers, 2023-10-31) Lopusina, Igor; Bouvier, Yann E.; Grbovic, Petar J.
The active voltage balancing device is a necessary part of some modern power electronics applications. Among numerous possible hardware solutions, the Series Resonant Balancing Converter shows advantages in terms of efficiency and low complexity, due to the soft-switching capability and stable operation in the open-loop. This paper models the steady-state operation of Series Resonant Balancing Converter, including the influence of parasitic components, such as parasitic resistances and semiconductors' forward voltages. Additionally, the dynamic modeling, describing the transient behaviour of the Series Resonant Balancing Converter, is presented, as well as the average model of the Series Resonant Balancing Converter with corresponding transfer functions. Frequency analysis and the low-pass nature of the Series Resonant Balancing Converter is presented and a case in which a large DC bus capacitor is connected externally is discussed. Lastly, the design example of a 7.6 kW, 700 V DC bus voltage, Series Resonant Balancing Converter is presented, and modeled steady-state and transient operations are experimentally verified.