Fully Soft Switched Interleaved High Step-Up/Down Bidirectional Converter With no Pulsating Current at Low Voltage Source

Packnezhad, Mohsen; Farzanehfard, Hosein

doi:10.1109/tie.2021.3120484

Cited by 18 publications

(4 citation statements)

References 20 publications

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“…However, most SC converters are designed for low power levels and their structures often cannot be generalized into more stages [26], [27]. Other structures also use more switches that may require isolated gate drivers [28]- [30].…”

Section: Introductionmentioning

confidence: 99%

Boost DC-DC Converter with Switched-Capacitor and Four-State Switching Cell

Dias¹,

Lazzarin²

2024

Eletrônica de Potência

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The integration of switched-capacitor voltage multiplier cells in basic converter topologies has been studied to provide voltage gain and voltage stress reduction. However, SC cells do not provide current sharing and additionally they induce high current spikes in the devices, which are limitations of these structures to operate in high power levels. The main contribution of this paper is to overcome this drawback proposing the use of a multistate switching-cell for current sharing in SCbased boost converters, which reduces the current stress in the power devices and increases the power levels of this family of converters. The proposed concept can be generalized for m number of SC cells and n number of switching cells to increase the voltage gain and current levels. Furthermore, it can be applied to other basic structures. The theoretical analysis of the proposed structure was evaluated experimentally in a 3 kW boosttype dc-dc converter, achieving 200 V to 1200 V voltage gain, and reaching 98.4% of maximum efficiency.

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Section: Introductionmentioning

confidence: 99%

Boost DC-DC Converter with Switched-Capacitor and Four-State Switching Cell

Dias¹,

Lazzarin²

2024

Eletrônica de Potência

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“…To prevent it in step-up converters with tapped inductors, a snubber circuit is applied. There are several clamp techniques [12][13][14] that recover the leakage energy and allow the use of switches with a low voltage rating.…”

Section: Introductionmentioning

confidence: 99%

“…One of the main problems in boost converters with a coupled inductor is the high input current ripple, which requires the use of additional input filters. This problem is solved in interleaved converters [11,[22][23][24]; however, such systems require the employment of many more components, and it can be unprofitable in applications with power in the range of hundreds of watts.…”

Section: Introductionmentioning

confidence: 99%

Lossless Clamp Circuit With Turn-OFF Voltage and Current Reduction in High Step-Up DC–DC Converter With Coupled Inductor

Harasimczuk,

Kopacz,

Tomaszuk

2024

IEEE Trans. Power Electron.

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High power density, high voltage gain soft-switching PWM DC-DC converter with a tapped inductor is proposed in this paper as a front-end for low-voltage sources in energy generation systems. The leakage inductance is incorporated into the resonant tank, decreasing the component count. The use of the boost capacitor connected in series with the secondary windings of the tapped inductor causes high voltage gain at the low turn ratio of the coupled inductor. By incorporating a resonant passive clamp circuit, not only the voltage spikes on the transistor are restrained, but zero-voltage switching of the transistor and zero-current turning-off of the diodes are obtained. The resonant operation results in low power losses in the switches, providing high efficiency in a wide output power range. Owing to soft-switching operation, the transistor can be driven with a high switching frequency, providing a consolidated design of the high power density converter. The principles of operation of the converter were also analyzed theoretically. Finally, the converter is validated through a laboratory model with a power rating of 300 W and a switching frequency of 200 kHz. 1

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“…To buffer energy in these systems, storage devices along with a bidirectional DC‐DC converter (BDC) are required due to the difference of the consumed and the generated power in renewable sources. In fact, BDCs are employed to manage voltage level and transfer power between the storage devices as a low voltage source (

V_L

) and DC bus as a high voltage source (

V_H

) [3–5]. When the voltage difference between

V_H

and

V_L

is high, a BDC with high voltage conversion ratio (VCR) is inevitable [6, 7].…”

Section: Introductionmentioning

confidence: 99%

Fully soft switched high step‐up/down bidirectional buck/boost converter with reduced switch voltage stress

Packnezhad

Talebi

Farzanehfard

2023

IET Power Electronics

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A fully soft switched high step‐up/down bidirectional converter is presented in this paper. The high voltage conversion ratio is achieved by a pair of coupled inductors along with a switched capacitor while all active switches operate at zero voltage switching. To provide soft switching condition for the main switches and absorb the leakage inductance energy of coupled inductors, active clamp circuits are utilized for both operating modes. Furthermore, all active switches body diodes which are utilized as converter diodes turn off at zero current switching (ZCS) and thus, the reverse recovery problem is eradicated. Additionally, the voltage stress of the main switches is reduced in comparison with the basic bidirectional buck/boost converter and thus, their drain‐source resistance is relatively lower which leads to considerably lower conduction loss. All the mentioned advantages along with relatively low number of components contribute to the converter efficiency. Theoretical analysis of the proposed converter is presented in detail for both operating modes and the experimental results from the implementation of a 300 W prototype circuit confirm the validity of the converter performance. A comprehensive comparison table between the proposed converter and the recent counterpart bidirectional converters is presented to demonstrate the converter advantages.

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Fully Soft Switched Interleaved High Step-Up/Down Bidirectional Converter With no Pulsating Current at Low Voltage Source

Cited by 18 publications

References 20 publications

Boost DC-DC Converter with Switched-Capacitor and Four-State Switching Cell

Boost DC-DC Converter with Switched-Capacitor and Four-State Switching Cell

Lossless Clamp Circuit With Turn-OFF Voltage and Current Reduction in High Step-Up DC–DC Converter With Coupled Inductor

Fully soft switched high step‐up/down bidirectional buck/boost converter with reduced switch voltage stress

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