Performance and design analysis of an improved non‐isolated multiple input buck DC–DC converter

Int Trans Electr Energ Syst

et al. 2019

Self Cite

Summary In this paper, a new extendable high step‐up multi‐input‐single‐output dc‐dc converter is presented. The proposed converter is composed based on the conventional boost converter and conventional buck‐boost converter. The benefits of the proposed converter consist of the simple control of each duty cycle and low‐voltage stress across the semiconductors. Therefore, conduction losses can be reduced by using the switch with lower resistance rDS(on). The presented converter is flexible to obtain the high power level with the proper selection of duty cycle values. Therefore, the presented converter is controllable in different power levels of input sides. In fact, the proposed converter supports the operation of multiple input sources without any changes in the structure of the topology. The dynamic modeling and efficient multivariable controller design with dynamic responses for the proposed converter are analyzed completely. To confirm the performance of the presented converter, mathematical analysis and simulation results are presented. In addition, the comparison between the presented converter and some other topologies is provided. In order to illustrate the efficient operation of the presented converter, a laboratory prototype for a 425 V/300 W with 40‐ and 45‐V input voltages and 95.62% efficiency is implemented.

Section: Output Voltage and Input Power Ratio Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A multi‐input‐single‐output high step‐up DC‐DC converter with low‐voltage stress across semiconductors

Mohseni

Hosseini

Int Trans Electr Energ Syst

et al. 2019

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“…Many MICs with different types for various applications have been proposed in recent years . A MIC can be designed with conventional converters such as boost, buck/boost, sepic, cuk, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Many MICs with different types for various applications have been proposed in recent years. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] A MIC can be designed with conventional converters such as boost, buck/boost, sepic, cuk, etc. They can be applied to these systems.…”

Section: Introductionmentioning

confidence: 99%

Analysis and implementation of a novel three input DC‐DC boost converter for sustainable energy applications

Ardi

Ajami

Int Trans Electr Energ Syst

2019

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Summary A new three input converter is presented for sustainable energy applications. Two unidirectional ports of the converter are used to connect power supplies which can be controlled independently via the duty cycles of switches. For connecting storage element, one of the ports is bidirectional. Using duty ratios of the switches, battery charging/discharging can be also controlled. Since the inductors are connected to the inputs, the input current ripples are low. Higher voltage gain and other advantages of the converter such as no limitation for switching modulation and wide control range of input powers make the proposed converter suitable for sustainable energy applications. Even if one of the power supplies fails to provide energy, the converter can provide energy to the load and charge/discharge the battery without voltage gain deduction. The steady‐state analysis of the converter is discussed, and experimental results are provided to validate the feasibility of the proposed converter.

“…Also, the input current of these topologies [9][10][11] is discontinuous. Because continuous input current is required for performing Maximum Power Point Tracking (MPPT) in PV or wind turbine applications, the topologies presented in Varesi et al, Kumar and Jain, and Nahavandi et al [9][10][11] are not appropriate suggestions for PV and wind turbine applications. The large number of switches that are required in bidirectional applications is another disadvantage of topology presented in Kumar and Jain.…”

Section: Introductionmentioning

confidence: 99%

A high‐voltage gain nonisolated noncoupled inductor based multi‐input DC‐DC topology with reduced number of components for renewable energy systems

Varesi

Hosseini

et al. 2017

Circuit Theory & Apps

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Summary This paper proposes a modular nonisolated noncoupled inductor‐based high‐voltage gain multi‐input DC‐DC converter. Despite the high‐voltage gain of the proposed topology, the average of normalized voltage stress (NVS) on its switches/diodes is low. This property leads to less loss and cost of switches/diodes. Using the same number of components, the proposed topology produces higher voltage gains, in comparison with recently presented high step‐up topologies. Also, the proposed topology utilizes less number of components (capacitors, inductors, diodes, and switches) for producing a desired voltage gain, which can reduce the size, mass, cost, complexity, and losses and improve the efficiency of converter. Continuous current of input sources is another main advantage of the proposed topology. All the abovementioned characteristics have made the proposed topology very suitable for renewable energy systems (or even hybrid/electric vehicles). Design considerations of the proposed topology have also been presented. For better evaluation, the proposed topology has been compared with some of recently presented high step‐up structures, from viewpoints of producible voltage gain, number of components, and normalized voltage stress (NVS) on switches/diodes. Finally, the prototype of 2‐input version has been experimentally implemented. Obtained experimental results confirm appropriate performance of the proposed topology.