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A General Analysis of the ZeroVoltage Switched QuasiResonant BuckBoost Type DCDC Converter in the Continuous and Discontinuous Modes of the Reactor Current
Hirofumi MATSUO Hideki HAYASHI Fujio KUROKAWA Mutsuyoshi ASANO
Publication
IEICE TRANSACTIONS on Communications
Vol.E75B
No.11
pp.11591170 Publication Date: 1992/11/25
Online ISSN:
DOI:
Print ISSN: 09168516 Type of Manuscript: Special Section PAPER (Special Issue on Telecommunications Energy Systems and Switching Power Converters) Category: Keyword: DCDC converter, voltageresonant, buckboost type, zerovoltage switching, discontinuous reactor current mode,
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Summary:
The characteristics of voltageresonant dcdc converters have already been analyzed and described. However, in the conventional analysis, the inductance of the reactor is assumed to be infinity and the loss resistance of the power circuit is not taken into account. Also, in some cases, the averaging method is applied to analyze the resonant dcdc converters as well as the pwm dcdc converters. Consequently, the results from conventional analysis are not entirely in agreement with the experimental ones. This paper presents a general designoriented analysis of the buckboost type voltageresonant dcdc converter in the continuous and discontinuous modes of the reactor current. In this analysis, the loss resistance in each part of the power circuit, the inductance of the reactor, the effective value (not mean value) of the power loss, and the energybalance among the input, output and internalloss powers are taken into account. As a result, the behavior and characteristics of the buckboost type voltageresonant dcdc converter are fully explained. It is also revealed that there is a useful mode in the discontinuous reactor current region, in which the output voltage can be regulated sufficiently for the load change from no load to full load and for the relatively large change of the input voltage, and then the change in the switching frequency can be kept relatively small.

