A New Variable Frequency Zero Voltage Switching Control Method for Boost Converter Operating in Boundary Conduction Mode

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Norouzi S.; Ghoreishy H.; Ale Ahmad A.; Tahami F.

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Journal Paper

Paper Information

Journal: International Journal of Engineering Year:2020 | Volume:33 | Issue:11 Page(s): 2222-2232

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Information Journal Paper

Title

A New Variable Frequency Zero Voltage Switching Control Method for Boost Converter Operating in Boundary Conduction Mode

Author(s)

Norouzi S. | Ghoreishy H. | Ale Ahmad A. | Tahami F. | Issue Writer Certificate

Keywords

Boundary Conduction Mode

DC-DC GaN boost converter

fully zero voltage switching

high frequency switching

valley switching

extended switching

Zero Current Switching

Abstract

This paper proposes a new variable frequency zero voltage switching (ZVS) control method for boost converter operating in Boundary Conduction Mode (BCM). The intended method keeps the converter in BCM despide of the load and input voltage variations. This is done by changing switching frequency in a certain specified range. The proposed method can guarantee circuit performance in BCM via zero-crossing detection of the inductor current and changing the switching frequency. In addition, with a slight modification in control structure, it is possible to achieve a fully ZVS in all cases. This converter control is carried out in analog form without using microprocessors which, compared with the digital one, has less noise, cost and processing challenges in high frequency applications. Simulation results obtained from applying the proposed method on a GaN-based synchronous boost converter in two different switching frequency ranges (100KHz and 1MHz) are indicative of the proposed strategy advantages.

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