Low Input Ripple High Step-Up Extendable Hybrid DC-DC Converter

Guo, Lin; Zhang, Zhou

doi:10.1109/access.2019.2950524

Cited by 25 publications

(20 citation statements)

References 25 publications

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“…The two-phase interleaved boost structure was improved in Ref. [52] in the context of renewable energy sources. When different inductors supplied energy to the load, the later-end capacitors worked in different states, effectively improving the step-up ratio with a small ICR.…”

Section: Interleaved Structurementioning

confidence: 99%

Review of DC-DC Converter Topologies Based on Impedance Network with Wide Input Voltage Range and High Gain for Fuel Cell Vehicles

Wang

Zhang

et al. 2021

Automot. Innov.

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The development of fuel cell vehicles (FCVs) has a major impact on improving air quality and reducing other fossil-fuel-related problems. DC-DC boost converters with wide input voltage ranges and high gains are essential to fuel cells and DC buses in the powertrains of FCVs, helping to improve the low voltage of fuel cells and “soft” output characteristics. To build DC-DC converters with the desired performance, their topologies have been widely investigated and optimized. Aiming to obtain the optimal design of wide input range and high-gain DC-DC boost converter topologies for FCVs, a review of the research status of DC-DC boost converters based on an impedance network is presented. Additionally, an evaluation system for DC-DC topologies for FCVs is constructed, providing a reference for designing wide input range and high-gain boost converters. The evaluation system uses eight indexes to comprehensively evaluate the performance of DC-DC boost converters for FCVs. On this basis, issues about DC-DC converters for FCVs are discussed, and future research directions are proposed. The main future research directions of DC-DC converter for FCVs include utilizing a DC-DC converter to realize online monitoring of the water content in FCs and designing buck-boost DC-DC converters suitable for high-power commercial FCVs.

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Section: Interleaved Structurementioning

confidence: 99%

Review of DC-DC Converter Topologies Based on Impedance Network with Wide Input Voltage Range and High Gain for Fuel Cell Vehicles

Wang

Zhang

et al. 2021

Automot. Innov.

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show abstract

“…Based on Equations ( 15), (16), and (20), the expression of the conversion ratio can be calculated as follows:…”

Section: Voltage Gain Expressionmentioning

confidence: 99%

“…In addition, the voltage gain can be easily changed by adjusting the turns ratio of the transformer. 16 The disadvantages of transformerbased converters include high-voltage stress of the main switches and EMI, which occurs due to the leakage inductance of the transformer. 17 Furthermore, the efficiency is low in these converters since the energy is transferred to the load through the transformer.…”

Section: Introductionmentioning

confidence: 99%

A novel soft‐switched interleaved high step‐up DC–DC converter for high‐efficiency conversion

Sadighi

Afjei

Salemnia

2021

Circuit Theory & Apps

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The present study aims to present a new interleaved soft-switched high stepup DC-DC converter, which is suitable for renewable energy sources, by integrating built-in transformer. A high conversion ratio is achieved by adjusting the turns ratio of the built-in transformer and duty cycle. The proposed converter uses active clamped circuit, which provides zero-voltage switching (ZVS) and a zero-current switching (ZCS) operation for all switches and diodes, respectively. Therefore, the losses caused by reverse recovery are considerably alleviated by providing ZCS condition in the diodes. The proposed structure has some advantages such as low-voltage stress across power switches, very low-input current ripple, fewer components, and lower cost.The MOSFET with low drain-source resistance can be used due to the lowvoltage stress, which could reduce conduction losses. Furthermore, a 500-W, 48-V input to 380-V output laboratory prototype is built and tested to validate the performance of the proposed topology.

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“…It is demonstrated in [8]- [10] for renewable energy applications, but also in articles [14]- [20], which present high-voltage-gain converters with SC circuits. The converters proposed in [14]- [17] are built as a hybrid switched-capacitor/switched-inductor (SC/SI) structure with inductors on the input side. This allows for a decrease in the input current ripple by the utilization of the proposed topology and control concept, as well as the use of the SC structure for adequate voltage gain achievement.…”

Section: Introductionmentioning

confidence: 99%

Input Current Ripple Reduction in a Step-Up DC–DC Switched-Capacitor Switched-Inductor Converter

2022

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This paper presents research results related to the concept of a high-voltage-gain DC-DC converter with a low input current ripple. In the proposed topology, a low-volume DC-DC switch-mode boost converter operates in parallel with a switched-capacitor voltage multiplier (SCVM). The overall converter achieves a four-fold voltage gain, but the voltage stress of the transistor and the diode of the boost converter is only half of the output voltage. This is achieved by applying the specific topology of the proposed converter. Furthermore, the boost part uses a low-volume choke as it operates in the discontinuous conduction mode (DCM). The parallel operation of the boost converter with the SCVM decreases the current stress in some components of the multiplier. This paper presents a concept of the hybrid converter, an analytical model for the selection of components and switching parameters, an efficiency model, and the verification of the converter operation through simulation tests and experiments.

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Low Input Ripple High Step-Up Extendable Hybrid DC-DC Converter

Cited by 25 publications

References 25 publications

Review of DC-DC Converter Topologies Based on Impedance Network with Wide Input Voltage Range and High Gain for Fuel Cell Vehicles

Review of DC-DC Converter Topologies Based on Impedance Network with Wide Input Voltage Range and High Gain for Fuel Cell Vehicles

A novel soft‐switched interleaved high step‐up DC–DC converter for high‐efficiency conversion

Input Current Ripple Reduction in a Step-Up DC–DC Switched-Capacitor Switched-Inductor Converter

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