Soft switching bidirectional DC–DC converter for ultracapacitor–batteries interface

Adib, Ehsan; Farzanehfard, Hosein

doi:10.1016/j.enconman.2009.07.001

Cited by 46 publications

(13 citation statements)

References 9 publications

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“…1 (e). The output of this converter has low ripple as compared to above described topologies hence this converter can be a better option for interfacing super-capacitor-battery in circuits [26], [27]. The ripple output current can be reduced by coupling of inductor L1and L2.…”

Section: Bidirectional Cuk Convertermentioning

confidence: 92%

Bidirectional dc to dc Converters: An Overview of Various Topologies, Switching Schemes and Control Techniques

Ravi¹,

Reddy²,

S.L³

et al. 2018

IJET

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Bidirectional dc to dc converter is used as a key device for interfacing the storage devices between source and load in renewable energy system for continuous flow of power because the output of the renewable energy system fluctuates due to change in weather conditions. In electric vehicles also, bidirectional converter is used between energy source and motor for power supply from battery to motor. Thus, bidirectional dc to dc converters are getting more and more attention in academic research and in industrial applications. Bidirectional dc to dc converters work in both buck and boost mode and can manage the flow of power in both the direction between two dc sources and load by using specific switching scheme and phase shifted control strategy and hence generated excess energy can be stored in batteries/super capacitors. Therefore, the basic knowledge and classification of bidirectional dc to dc converters on the basis of galvanic isolation, the comparison between their voltage conversion ratio and output current ripple along with various topologies researched in recent years are presented in this paper. Finally, zero current and zero voltage soft switching schemes and phase shifted controlling techniques are also highlighted.

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Section: Bidirectional Cuk Convertermentioning

confidence: 92%

Bidirectional dc to dc Converters: An Overview of Various Topologies, Switching Schemes and Control Techniques

Ravi¹,

Reddy²,

S.L³

et al. 2018

IJET

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show abstract

“…Being an inseparable and obligatory part of the energy storage systems of rapid growing FCEV, HEV and EV's around the world, BDC's are required to shape for high gain, high efficiency and high power density to adopt the coming future. Researchers widely investigated isolated and non-isolated bi-directional converters primarily for high gain and high efficiency [1][2][3][4][5][6][7][8]. In non-isolated class of BDC's, multilevel concept and coupled inductor based designs are adopted to attain a very high gain circuit [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A high power density soft switching bidirectional converter using unified resonant circuit

Salam¹,

Aziz

2015

2015 IEEE Conference on Energy Conversion (CENCON)

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This paper proposes a high efficiency bi-directional converter with high power handling capability. Soft switching technique is endowed with all power switches by using an auxiliary unified resonant circuit. Zero voltage switching (ZVS) and zero current switching (ZCS) modes are implemented for all power switches in boost operation. For buck mode of operation, ZVS and ZCS are executed for most of the power switches. Voltage stresses for all of the power switches are significantly reduced. Additionally, the proposed converter has a high step up and step down gain compared to a conventional bi-directional converter. The circuit is simulated in PSPICE and performance parameters are measured and verified. Keywords-Bi-directional converter(BDC), zero voltage switching(ZVS), zero current switching(ZCS), zero voltage transition(ZVT).

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“…The converter circuit described in [28] suffers from high number of circuit elements. For soft-switched bidirectional converters proposed in [29] and [30], current and voltage stresses on the switches are very high leading to increased cost, reduced efficiency and poor field-reliability. This paper presents a new bidirectional converter in which ZVT is obtained for the switches to reduce the switching losses.…”

Section: Introductionmentioning

confidence: 99%

New, efficient, low-stress buck/boost bidirectional DC-DC converter

Ahmadi

Shenai

2012

2012 IEEE Energytech

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Bidirectional dc-dc converters (BDCs) are used in many applications when bidirectional energy transfer between two DC buses is needed. They are used as an interface circuit between ultra-capacitor and DC bus in a Hybrid Electric Vehicle (HEV). Since the voltage levels of the ultra-capacitor and DC bus are different, the interface circuitry must be able to increase or decrease the voltage level in each power flow direction while limiting the current. This paper presents a new bidirectional converter employing Gallium Nitride (GaN) power transistors in which Zero-Voltage-Transition (ZVT) switching is provided for all switches to dramatically reduce the switching losses regardless of power flow direction. The soft-switched GaN power transistors result in a significant increase in the efficiency of the new converter compared to that of conventional hard-switched bidirectional converters. Because of low conduction losses, and reduced current and voltage stresses the proposed converter is scalable to higher power levels. Reduced current ripple increases the ultra-capacitor life time. The operation of the converter is discussed in detail and verified using circuit simulations; the efficiency of the new converter is compared with the conventional bidirectional converters.

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Soft switching bidirectional DC–DC converter for ultracapacitor–batteries interface

Cited by 46 publications

References 9 publications

Bidirectional dc to dc Converters: An Overview of Various Topologies, Switching Schemes and Control Techniques

Bidirectional dc to dc Converters: An Overview of Various Topologies, Switching Schemes and Control Techniques

A high power density soft switching bidirectional converter using unified resonant circuit

New, efficient, low-stress buck/boost bidirectional DC-DC converter

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