Family of non-isolated zero current transition bi-directional converters with one auxiliary switch

Ahmadi, Mehran; Mohammadi, Mohammad Reza; Adib, Ehsan; Farzanehfard, Hosein

doi:10.1049/iet-pel.2011.0098

Cited by 46 publications

(26 citation statements)

References 28 publications

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“…In Figure 13a, the first trace and second trace are the switch voltage and current of S 1 , respectively, whereas the third and fourth traces depict the measurements of S 2 . From Figure 13a, it can be found that S 1 endures a voltage of around 100 V. This value is consistent with the estimation in Equation (9). The measured i ds1 matches the conceptual waveform in Figure 4.…”

Section: Resultssupporting

confidence: 84%

“…However, the higher switch frequency is, the lower conversion efficiency will be. In order to eliminate switching loss, employing resonant unit with auxiliary switches for soft-switching achievement is a common approach [9][10][11]. In literature [12], the authors develop a dual-bridge converter to fulfill bidirectional power flow controlling along with zero voltage switching (ZVS) at main switch, in which even resonant tank is utilized but the use of additional auxiliary switch can be avoided.…”

Section: Introductionmentioning

confidence: 99%

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Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Shen

Tsai

2017

Energies

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Abstract:In this paper, a novel isolated bidirectional DC-DC converter is proposed, which is able to accomplish high step-up/down voltage conversion. Therefore, it is suitable for hybrid electric vehicle, fuel cell vehicle, energy backup system, and grid-system applications. The proposed converter incorporates a coupled inductor to behave forward-and-flyback energy conversion for high voltage ratio and provide galvanic isolation. The energy stored in the leakage inductor of the coupled inductor can be recycled without the use of additional snubber mechanism or clamped circuit. No matter in step-up or step-down mode, all power switches can operate with soft switching. Moreover, there is a inherit feature that metal-oxide-semiconductor field-effect transistors (MOSFETs) with smaller on-state resistance can be adopted because of lower voltage endurance at primary side. Operation principle, voltage ratio derivation, and inductor design are thoroughly described in this paper. In addition, a 1-kW prototype is implemented to validate the feasibility and correctness of the converter. Experimental results indicate that the peak efficiencies in step-up and step-down modes can be up to 95.4% and 93.6%, respectively.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Shen

Tsai

2017

Energies

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show abstract

“…In addition, a battery pack can be connected to the DC bus by a bidirectional DC-DC converter, resulting in a high efficiency powertrain [17]- [18]. Moreover, the output voltage of fuel cells drops with the increasing output power [19].…”

Section: Introductionmentioning

confidence: 99%

Single-Switch, Wide Voltage-Gain Range, Boost DC–DC Converter for Fuel Cell Vehicles

Zhang

Zhou

Sumner

et al. 2018

IEEE Trans. Veh. Technol.

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Abstract-In order to match voltages between the fuel cell stacks and the DC link bus of fuel cell vehicles, a single-switch Boost DC-DC converter with diode-capacitor modules is proposed in this paper. The capacitors are charged in parallel and discharged in series. The wide voltage-gain range can be obtained by using a simple structure. In addition, the basic operating principles, the extended stages, the fault tolerant operation, and steady-state characteristics of the converter are analyzed and presented in this paper, and the small-signal model is also derived. A 400V, 1.6kW experimental prototype is developed, and the wide voltage-gain range (3.3~8) is demonstrated with a maximum efficiency at 97.25%. The experimental results validate the effectiveness and feasibility of the proposed converter and its suitability as a power interface for fuel cell vehicles.

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“…2.5% greater than that of the ZCT boost of [25] and reaches 97% under full load. The proposed converter achieves a higher efficiency because of the better switching conditions and transfer of circulating energy to the output.…”

Section: Resultsmentioning

confidence: 80%

“…The efficiency curve of the proposed converter and that of ZCT boost converter of [25] are compared using the PSpice software (Fig. 9).…”

Section: Resultsmentioning

confidence: 99%

A New Family of Non-Isolated Zero-Current Transition PWM Converters

Yazdani¹,

Dust²,

Hemmati³

2016

Journal of Power Electronics

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A new auxiliary circuit for boost, buck, buck-boost, Cuk, SEPIC, and zeta converters is introduced to provide soft switching for pulse-width modulation converters. In the aforementioned family of DC-DC converters, the main and auxiliary switches turn on under zero current transition (ZCT) and turn off with zero voltage and current transition (ZVZCT). All diodes commutate under soft switching conditions. On the basis of the proposed converter family, the boost topology is analyzed, and its operating modes are presented. The validity of the theoretical analysis is justified by the experimental results of a 100W, 100 kHz prototype. The conducted electromagnetic emissions of the proposed boost converter are measured and found to be lower than those of another ZCT boost converter.

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Family of non-isolated zero current transition bi-directional converters with one auxiliary switch

Cited by 46 publications

References 28 publications

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Single-Switch, Wide Voltage-Gain Range, Boost DC–DC Converter for Fuel Cell Vehicles

A New Family of Non-Isolated Zero-Current Transition PWM Converters

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