Design of an AC/DC Converter with using Supercapacitors as Energy Storage
Keywords:
Supercapacitors, AC/DC converter, Bidirectional DC/DC converterAbstract
This paper presents a design of a high power factor AC/DC converter with using supercapacitors as energy storage.The proposed system consists of a cuk topology based AC/DC power converter and a bidirectional DC/DC converter which is connected between the AC/DC converter and supercapacitors for transferring electrical energy between the system output and supercapacitors. In normal mode, load is energized by the AC line via the AC/DC converter and the DC/DC converter is controlled to charge supercapacitors. In the case of the AC line faults, the bidirectional DC/DC converter is controlled to transfer energy from supercapacitors to load. To verify the proposed system concept, the AC/DC converter and the bidirectional DC/DC converter were built and 25V/10F supercapacitors are used as energy storage. The output voltage of the AC/DC converter is 48 V at 250 W output power. From the experimental results, the input power factor of the AC/DC converter is about 0.99 and the backup time is 7s for 100 W of output power.
References
2. Talapko, D. (2012). Telecom Datacenter Power Infrastructure Avilability Comparison of DC and AC UPS, The 34th IEEE International Telecom- munications Energy Conference (INTELEC) 2012, Scottsdale, AS, USA.
3. Gualous, H., Louahlia, H. and Gallay, R. (2011).Supercapacitor Characterization and Thermal Modelling with Reversible and Irreversible Heat Effect, IEEE Transactions on Power Electronics, vol.26, no.11, November 2011, pp.3402-3409.
4. Spiazzi, G. and Mattavelli, P. (1994). Design Criteria for Power Factor Preregulators Basedon Sepic and Cuk Converters in Continuous Conduction Mode. The IEEE Industry Applications Society Annual Meeting 1994.
5. Aboulnaga, A.A. and Emadi, A. (2004).Performance Evaluation of the Isolated Bidirectional Cuk Converter with Integrated Magnetics, The IEEE Annual Conference in Power Electronics Specialists Conference 2004, Aachen, Germany.
For Author
