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Dual-active-bridge (DAB) topology requires a powerful controller to realize voltage conversion and address fast load transients. A controller with nonlinear feedforward and linear feedback loops is able to facilitate a DAB converter to fulfill this requirement. The nonlinear feedforward loop is designed based on the nonlinear model of the DAB converter. The linear feedback loop is realized as a traditional...
Integration of functions and features into silicon circuits is very important for a new power circuit design in order to reduce the electronic bill of material's (eBOM) cost and component count. These eBOM reductions increase the reliability and decrease the cost and size of a product. A low cost power micro-inverter using two application specific integrated circuits, analog power manager (APM) and...
This paper presents an interleaved totem-pole bridgeless power factor correction (PFC) rectifier which consists of a coupled inductor and two interleaved bridge arms. The core utilization and power density are improved with the use of coupled inductor. However, it also introduces a serious diode reverse-recovery problem and increases the turn-on loss obviously due to the poor parasitic body diode...
Renewable sources like solar PV, fuel cell, etc., needs high boost inversion in order to connect to utility supply due to their low output voltage nature. Apart from high gain, some other desirable features of the inverter are low component count, high efficiency, low footprint, immunity to spurious signals like EMI. In this paper a three winding coupled inductor based inverter topology is presented...
With the development of Modular structured Voltage Source Converters (VSC), Multi-Terminal DC (MTDC) transmission systems have now become a feasible solution to transmit power at high voltage which greatly improves the electric power transmission system. The MTDC grid has lower capital costs and lower losses than an equivalent AC transmission system. Thus for long distance power transmission MTDC...
An improved steady-state model is developed in this paper for the dual-active-bridge (DAB) dc-dc converter. It is first shown how the well-known ideal model fails to predict DAB dc characteristics, and that differences in model predictions compared to experimental results can be very large, especially in cases where the DAB series tank inductance is relatively small. A new analysis method is then...
This paper investigates the impact of three transformer-winding configurations, i.e. the Y-Y, the Y-Δ, and the Δ-Δ configuration, on the performance of a three-phase dual active bridge (DAB) dc-dc converter. For each configuration, equations for the phase current, power flow, and soft-switching boundaries are derived for all possible switching modes of the three-phase DAB. Thereafter, a comparison...
The Dual Active Bridge (DABC) dc-dc converter is an integral part of the recently popular Medium-Voltage (MV) dc micro-grid application due to its high-power density. The advent of 15kV SiC IGBT and 10kV SiC MOSFET, has enabled a non-cascaded MV and Medium-Frequency (MF) DABC converter which is expected to have higher MTBF than the cascaded H-bridge topology due to relatively small number of switches...
A new fixed-frequency controlled 3-phase dc-dc LCL-type series resonant converter with integrated boost function is proposed for medium to large power applications with wide input voltage variation that is typical of alternate energy sources. The converter includes dual three-phase LCL-type resonant bridge inverter modules connected in parallel, thus significantly reducing the component stresses when...
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