Cícero M. T. Cruz

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A circuit configuration of a single-phase nonisolated online uninterruptible power supply (UPS) with 110-V/220-V input–output voltage ratings is proposed, allowing the bypass operation without a transformer even if the input voltage is different from the output voltage. The converter consists of an ac–dc/dc–dc three-level boost converter combined with a(More)
A new high voltage gain dc-dc converter is proposed on this work as a viable solution to step-up a low battery voltage into a high voltage dc link. This converter is suitable for non-isolated on-line UPS systems with common neutral connection, that improves bypass circuit installation. Furthermore, smaller size, higher efficiency, and increased reliability(More)
This paper presents a three-state switching cell singlephase three-level boost rectifier with Power Factor Correction (PFC) using FPGA digital control. Its main features are: reduced conduction losses, weight and volume; simple digital control strategy based on One-Cycle Control (OCC) technique using FPGA; connection between input and output enabling the(More)
This paper presents a three-phase three-level boost for Uninterruptible Power Supply (UPS) applications using FPGA. Its main features are: high power factor, reduced conduction losses, weight and volume, simple control strategy based on One-cycle Control (OCC), and connection between input and output enabling the use of inverter and bypass. A theoretical(More)
Photovoltaic (PV) is one of the main resources of Renewable Energy, as it is environmental friendly and relatively cost effective. It is utilized to produce electricity from the abundant solar energy. A PV system consists of (PV) array of modules, DC/DC converter with a fixed load and maximum power point tracking MPPT controller. The DC/DC converter is(More)
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