Title: Exploration of bifurcation and inherent oscillation in a current mode controlled Ćuk converter - effects of turn-on and turn-off switching delays

Authors: Sukanya Parui; Biswarup Basak

Addresses: Department of Electrical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India ' Department of Electrical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711103, West Bengal, India

Abstract: The nonlinear phenomena in a dc-dc current mode controlled Ćuk converter circuit have been explored. In reality, as any switching process is associated with turn-on and turn-off delays, the simulation has been extended considering these delays. The circuit exhibits a LC oscillation which may make the switch current oscillatory and in some cases the conclusion obtained from the bifurcation diagram regarding the dynamics of the system becomes incorrect. A mathematical expression for the oscillation frequency has been presented. A prototype of the converter has been developed. The simulated results have been verified experimentally.

Keywords: Ćuk converter; bifurcation; chaos; inherent oscillation; nonlinear dynamics; quasi-periodic oscillation; turn-on delay; turn-off delay.

DOI: 10.1504/IJPELEC.2022.126609

International Journal of Power Electronics, 2022 Vol.16 No.4, pp.451 - 469

Received: 30 Jun 2020
Accepted: 22 Feb 2021

Published online: 31 Oct 2022 *

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