Investigation of Asymmetrical PWM Method on High Step Down Interleaved DC-DC Converter With Modified Series Capacitor

Document Type : Original Article

Authors

Department of Electrical Engineering, Faculty of Engineering, Malayer University, Malayer, Iran.

Abstract

In this paper an asymmetrical pulse width modulation (PWM) method is used for a modified series capacitor interleaved buck converter. One of the problems of the interleaved converter is unbalance in the inductors current. In symmetrical pulse width modulation (PWM) method the duty cycles of switches are equal to each other and there are unbalance in the inductors current. To solve this problem, in this paper asymmetrical pulse width modulation (PWM) method is used. In asymmetrical PWM, duty cycle of switches are not equal. By using of asymmetrical PWM method, the modified series capacitor interleaved buck converter not only has linear voltage gain with high step down conversion ratio, but also the inductors currents are balanced. The proposed converter is simulated by MATLAB/Simulink software and the results are presented. Moreover, a laboratory prototype is tested to validate the simulation and the theoretical analysis.

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TABRIZ JOURNAL OF ELECTRICAL ENGINEERING

Articles in Press, Corrected Proof
Available Online from 15 January 2024

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