Digital Control of Bridgeless Interleaved PFC Boost Converter Based on Predicted Input Current

Abstract

In this study, digital control of bridgeless interleaved power factor correction (PFC) boost converter is presented by using DSP (digital signal processor) for prediction of input current without any current sensing. The complex control methods which have current sensing are utilized to get minimum ripple for current and appropriate sharing of current for interleaved PFC converters that reduce input current ripple and improve power rating, so they are much more convenient than the classic PFC converters. The current signals do not need to be sampled for proposed predictive control approach due to sampling of the voltages of input and output. The sampled voltages of input and output are employed to calculate input current for the converter. The parameters of converter, calculated input current and reference current that acquired from the voltage loop compensator are employed for predicting following duty cycle. By this way, the complex signal processing and current measuring are taken out when compared with the conventional control methods. An experimental circuit of bridgeless interleaved PFC boost converter has been installed to apply the proposed predictive control method via DSP board. It is seen from the results that appropriate sharing of current, the low value of total harmonic distortion (THD) and high rate of power factor can be acquired thanks to using the proposed predictive control strategy.

KEYWORDS:

• Bridgeless boost
• DSP
• PFC
• Predictive control

Additional information

Funding

The authors would like to acknowledge Scientific and Technological Research Council of Turkey (TUBITAK) for the financial support of this research. This research is supported by the TUBITAK with project no: EEEAG-111E171.

Notes on contributors

N. Genc

Naci Genc is a professor in the Electrical-Electronics Engineering Department of Yuzuncu Yil University. He received his BSc, MSc, and PhD from Gazi University, Yuzuncu Yil University and Gazi University in 1999, 2002, and 2010, respectively. His interests include energy conversion systems, power electronics and electrical machines. Corresponding author. Email: [email protected]

H. Uzmus

Hasan Uzmus is a research assistant in Electrical-Electronics Engineering Department of Yuzuncu Yil University. He received his BSc, and MSc from Zonguldak Karaelmas University and Yuzuncu Yil University in 2011 and 2016, respectively. His interests include renewable energy, power electronics and electrical machines. Email: [email protected]