Open AccessDissertation
Isolated Bi-directional DC-DC Converter with Smooth Start-up Transition
TLDR
In this article, an additional transitional stage is proposed to reduce the current spike without the use of any additional components, and the active clamp not only helps eliminate the transient spike caused by the transformer leakage, but also continues to be used during steady state.Abstract:
The bi-directional dc/dc converter is a very popular and effective tool for alternative energy applications. One way it can be utilized is to charge and discharge batteries used in residential solar energy systems. In the day, excess power from the PV panels is used to charge the batteries. During the night, the charged batteries will power the dc bus for loads in the house such as home appliances. The dual active bridge (DAB) converter is very useful because of its high power capability and efficiency. Its symmetry is effective in transferring power in both directions. However, the DAB converter has drawbacks in the start-up stage. These drawbacks in boost mode include high in-rush current during start-up, and the fact that the high side voltage cannot be lower than the low side voltage. A popular existing method to alleviate this problem is the use of an active clamp and a flyback transformer in the circuit topology to charge the high side before the converter is switched into normal boost operation. The active clamp not only helps eliminate the transient spike caused by the transformer leakage, but also continues to be used during steady state. However, this method introduces a new current spike occurring when the converter transitions from start-up mode to boost mode. To alleviate this new setback, an additional transitional stage is proposed to significantly reduce the current spike without the use of any additional components. The converter is current-fed on the low side, and voltage-fed on the high side. A simple phase shifread more
Citations
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A pwm plus phase-shift control bidirectional dc/dc converter
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Design and Implementation of Bidirectional DC-DC CLLLC Resonant Converter
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Study on Improving Line Frequency Ripple of Bidirectional DC-DC CLLC Resonant Converter
TL;DR: In this article , a digital controlled isolated bidirectional resonant converter for battery charging system with low double line frequency ripple in charging stage is implemented, which can achieve soft switching characteristic and higher efficiency.
References
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Journal ArticleDOI
A Bidirectional DC–DC Converter for an Energy Storage System With Galvanic Isolation
S. Inoue,Hirofumi Akagi +1 more
TL;DR: In this paper, a bidirectional dc-dc converter suitable for an energy storage system with an additional function of galvanic isolation is presented, where an electric double layer capacitor is directly connected to a dc side of the converter without any chopper circuit.
Journal ArticleDOI
Snubberless Bidirectional DC–DC Converter With New CLLC Resonant Tank Featuring Minimized Switching Loss
Wei Chen,Ping Rong,Zhengyu Lu +2 more
TL;DR: Possessing the very optimal ZVS +ZCS soft-switching feature, this proposed converter will have a minimized switching loss if all of the main switches are implemented with metal-oxide-semiconductor field-effect transistors, and thereby, the proposed converter is fully soft switched and totally snubberless.
Journal ArticleDOI
A natural ZVS medium-power bidirectional DC-DC converter with minimum number of devices
Hui Li,Fang Zheng Peng,J. Lawler +2 more
TL;DR: In this article, a dual half-bridge topology has been developed to implement the required power rating using the minimum number of devices, and an extended state-space averaged model is developed to predict large and small-signal characteristics of the converter in either direction of power flow.
Proceedings ArticleDOI
A comparative evaluation of isolated bi-directional DC/DC converters with wide input and output voltage range
TL;DR: In this article, the working principles and design equations of four different isolated, bi-directional DC to DC converter topologies (a dual active bridge converter, a series resonant converter and two multiple stage topologies) were presented for a 2 kW battery charger that can be operated in a wide input and output voltage range.
Journal ArticleDOI
Analysis and Implementation of a Novel Bidirectional DC–DC Converter
Lung-Sheng Yang,Tsorng-Juu Liang +1 more
TL;DR: A novel bidirectional dc-dc converter that employs a coupled inductor with same winding turns in the primary and secondary sides has higher step-up and step-down voltage gains than the conventional bidirectionals dc-DC boost/buck converter.
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