Proceedings ArticleDOI
Non-inverting buck-boost converter for fuel cell applications
Erik Schaltz,Peter Omand Rasmussen,Alireza Khaligh +2 more
- pp 855-860
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TLDR
The implementation with synchronous rectifiers provides the highest efficiency in the whole range of the fuel cell power, and its efficiency characteristic is more suitable for fuel cell applications than the implementation with diodes.Abstract:
Fuel cell DC/DC converters often have to be able to both step-up and step-down the input voltage, and provide a high efficiency in the whole range of output power Conventional negative output buck-boost and non-inverting buck-boost converters provide both step-up and step-down characteristics In this paper the non-inverting buck-boost with either diodes or synchronous rectifiers is investigated for fuel cell applications Most of previous research does not consider the parasitic in the evaluation of the converters In this study, detailed analytical expressions of the efficiencies for the system composed of fuel cell system and interfacing converter, considering the parasitics, are presented It is concluded that the implementation with synchronous rectifiers provides the highest efficiency in the whole range of the fuel cell power, and its efficiency characteristic is more suitable for fuel cell applications than the implementation with diodesread more
Citations
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Journal ArticleDOI
A Noninverting Buck–Boost DC–DC Switching Converter With High Efficiency and Wide Bandwidth
TL;DR: In this paper, a novel dc-dc switching converter consisting of a boost stage cascaded with a buck converter with their coils magnetically coupled is presented, which has the same step-up or step-down voltage conversion properties than the single inductor noninverting buck-boost converter but exhibits nonpulsating I/O currents.
Journal ArticleDOI
Hybrid Buck–Boost Feedforward and Reduced Average Inductor Current Techniques in Fast Line Transient and High-Efficiency Buck–Boost Converter
TL;DR: In this article, a buck-boost converter with high efficiency and small output ripple is proposed to extend the battery life of portable devices, and the hybrid buck-Boost feedforward (HBBFF) technique is integrated in this converter to achieve fast line response.
Journal ArticleDOI
Current-Mode Control of a Coupled-Inductor Buck–Boost DC–DC Switching Converter
TL;DR: In this article, a coupled-inductor buck-boost converter with an additional output voltage limiter loop is proposed as a method to regulate one of the currents while limiting the maximum values of the other two variables.
Journal ArticleDOI
A Two-Mode Control Scheme With Input Voltage Feed-Forward for the Two-Switch Buck-Boost DC–DC Converter
TL;DR: Comparisons between the two-mode control with and without IVFF compensation have been presented and the experimental results show that the TSBB converter has an improved input transient response and high efficiency over the entire input voltage range with this proposed control scheme.
Journal ArticleDOI
A Nonlinear State Machine for Dead Zone Avoidance and Mitigation in a Synchronous Noninverting Buck–Boost Converter
TL;DR: In this article, a nonlinear state machine is proposed as the solution to an operational dead zone near the buck/boost interface of the noninverting buck-boost converter, which completely avoids the dead zone while largely shielding the rest of the converter from its presence.
References
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Book
Fundamentals of Power Electronics
TL;DR: Converters in Equilibrium, Steady-State Equivalent Circuit Modeling, Losses, and Efficiency, and Power and Harmonics in Nonsinusoidal Systems.
Journal ArticleDOI
Design of a Wide Input Range DC–DC Converter With a Robust Power Control Scheme Suitable for Fuel Cell Power Conversion
TL;DR: The robust features of the proposed control system ensure a constant output DC voltage for a variety of load fluctuations, thus limiting the power being delivered by the fuel cell during a load transient.
Proceedings ArticleDOI
A high efficiency, noninverting, buck-boost DC-DC converter
M. Gaboriault,A. Notman +1 more
TL;DR: In this paper, the authors propose a buck-boost, DC-DC converter that provides a programmable constant output voltage, typically from single cell Li-ion, multicell NiMH, or alkaline power sources.
Journal ArticleDOI
Digital Combination of Buck and Boost Converters to Control a Positive Buck–Boost Converter and Improve the Output Transients
TL;DR: In this paper, a highly efficient and novel control strategy for improving the transients in the output voltage of a DC-DC positive buck-boost converter, required for low-power portable electronic applications, is presented.
Proceedings ArticleDOI
Digital combination of buck and boost converters to control a positive buck-boost converter
TL;DR: In this paper, a high efficiency control strategy for operating a buck-boost switching regulator is presented, which can regulate an output voltage for an input voltage, which is higher, lower, or the same as the output voltage.