Title: A novel control scheme for buck power converters using duty-cycle modulation

Authors: Jean Mbihi; Léandre Nneme Nneme

Addresses: Department of Textile Engineering and Fashion Industry, Advanced Teachers' Training College for Technical Education, University of Douala, BP 1872, Douala, Cameroon ' Department of Information Technology Engineering, Advanced Teachers' Training College for Technical Education, University of Douala, BP 1872, Douala, Cameroon

Abstract: A novel duty-cycle modulation control scheme for buck power converters is studied in this paper. Compared to the widely used pulse width modulation technique encountered in power electronics, the proposed control scheme offers under the same operating conditions a variety of merits, including a greater hardware simplicity, a lower modulation frequency and a better transient response. In addition, while offering new characteristics, it provides under load disturbances the same level of robustness than the standard pulse width modulation control technique. The characteristics of both control techniques are validated and compared on a well tested prototyping buck converter, using a mix of analytical reasoning, virtual simulations, and real tests on a laboratory workbench.

Keywords: duty-cycle modulation; DCM; modulation control; buck power converters; power electronics; pulse width modulation; PWM; hardware simplicity; lower modulation frequency; switching stresses; robustness; virtual simulation; laboratory workbench.

DOI: 10.1504/IJPELEC.2013.057038

International Journal of Power Electronics, 2013 Vol.5 No.3/4, pp.185 - 199

Received: 04 Nov 2012
Accepted: 31 Mar 2013
Published online: 30 Jun 2014 *

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