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A New Interleaved Three-Phase Single-Stage PFC AC-DC
Converter with Flying Capacitor
In this project, a new interleaved three-phase PFC AC-DC single-stage multilevel
converter is contemplated. The suggested converter can operate with reduced input current ripple
and peak switch currents due to its interleaved structure, a continuous output inductor current
due to its three-level structure, and improved light-load efficiency as some of its switches can be
turned on softly. In the project, the function of the converter is explained, the steady-state
characteristics of the new converter are determined and its design is discussed. The feasibility of
the new converter is confirmed with simulation results obtained from a converter and its
efficiency is compared to that of another multilevel converter of analogous class.
Existing Method:
Single-stage power-factor-corrected (SSPFC) converters that have PFC and isolated DCDC conversion in a single power converter so that they are simpler and cheaper than two-stage
converters. Several single-phase and three-phase converters have been proposed, with threephase converters being preferred over single-phase converters for higher power applications. A
three-phase, single-stage three-level converter has so many drawbacks due their less efficiency
of operation. The converter proposed was an advance over previously proposed three-phase
single-stage converters.
Proposed Method:
A new interleaved three-phase, three-level, single-stage power-factor-corrected AC-DC
converter that uses flying capacitor structure with standard phase-shift PWM was presented to
improve efficiency of the converter particularly at light load conditions.
Further Details Contact: A Vinay 9030333433, 08772261612
Email: |
Block Diagram:
Fig. Proposed single-stage three-level ac-dc converter.
The operation of the converter was explained and its feasibility was confirmed with simulation
Advantages and Applications:
1. It was shown that the proposed converter has a better efficiency, especially under lightload conditions.
2. The output inductor can always be used to ensure that the very top and the very bottom
switches can be turned ON with ZVS, due to a discharge path that is introduced by its
flying capacitor.
3. The topology also has an output current that is continuous for almost all load ranges, a
DC bus voltage that is less than 450 for all load conditions and a superior input current
harmonic content.
Further Details Contact: A Vinay 9030333433, 08772261612
Email: |