A Nonisolated Soft Switching Interleaved Converter With Extended Duty Cycle and Low Output Current Ripple

Asghari, Amin

doi:10.1109/tie.2020.3020023

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…The size and weight of magnetic and filter components of the power converters can be reduced by many folds with high switching frequency operation, but at the cost of excessive switching loss, increased current and voltage stress of semiconductor elements, large RFI &EMI, if operated with conventional hard switching. Extensive research works [1][2][3][4][5][6][7][8][9][10][11][12][13][14], [22], [25] are therefore carried out to minimize above issues by adopting softswitching transition of semiconductor switches. To meet the demand of modern applications, major research has been carried out in recent years to develop new topologies of softswitched buck converters.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Auxiliary networks using active and/or passive components including coupled or tapped inductors [1][2][3][4], [10] have been extensively used in the converters to meet one or more of the desirable features like, extended voltage gain [2][3], [5][6], wide duty-ratio operation [3], [9], [13]. The interleaved structure [5][6] can provide high step down ratio as well as low ripple content at the load current. In [7][8] soft turn on is obtained by triggering the gate pulse when the body diode of the switch is in conduction making the voltage across the semiconductor switch zero.ZVS transition is achieved by utilizing the leakage energy of the coupled inductor with the aid of an auxiliary network consists of an inductor, a switch and a diode in [9].Switched capacitor network [11] or voltage multiplier cells [12] or a combination of switched capacitor and coupled inductor [1][2][3][4], [11][12] have been used in many buck converters to extend the voltage gain.…”

Section: Introductionmentioning

confidence: 99%

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Novel Zero-Voltage Zero-Current Transition Buck Converter With Minimal Impact of Active Auxiliary Cell on Overall Dynamics

Pal¹,

Saha

2023

IEEE Access

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This paper presents a novel zero-voltage zero-current transition DC/DC buck converter, which uses an active auxiliary resonant network to achieve soft switching operation of semiconductor switches and soft-recovery of power diodes over wide output power range and offers high efficiency. The auxiliary cell in the proposed converter does not cause any additional current stress on the semiconductor switches and has minimal impact on overall dynamics of the converter. Steady-state performance of the converter has been presented with detailed theoretical analysis of all operating modes. The design of auxiliary cell components and development of small signal model of the converter have been carried out from the mathematical equations depicting its dynamic behaviour. A closed loop voltage mode controller with a type III compensator has been developed for the converter to achieve the desired transient response under the influence of external disturbances. Power loss analysis and superiority of the proposed converter over other conventional configurations are also presented here. Finally, soft-switching behaviour and step-input transient response of the converter are verified by hardware experimentation on a150W, 100 kHz prototype model. The experimental measurements have successfully validated the theoretically predicted behaviour of the converter.INDEX TERMS Buck converter, Soft-switching, Zero current switching (ZCS), Zero voltage switching (ZVS)

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Zero-Voltage Zero-Current Transition Buck Converter With Minimal Impact of Active Auxiliary Cell on Overall Dynamics

Pal¹,

Saha

2023

IEEE Access

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Interleaved step-down converter with capacitor-diode voltage splitter and minimum switches for low current ripple and extra-low voltage ratio

Shen,

Chen,

Liu

et al. 2024

Discov Appl Sci

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This paper proposes an interleaved step-down converter (ISDC) with a capacitor-diode voltage splitter. Even though the ISDC only utilizes two active switches, it can significantly step down a high input voltage to a much lower level and achieve interleaved current at output and continuous current at input without using an extreme duty ratio. In addition, the ISDC is capable of sharing output current equally between two interleaved paths by controlling the two switches. Therefore, the ISDC has lower current ripples and reduces EMI noise. The ISDC can be easily expanded only by adopting capacitors and diodes for a much higher conversion ratio, avoiding using any active switch. A comprehensive analysis of ISDC is presented, including operation principle, steady-state analysis, design consideration, expendability of the power stage, and converter comparison. A prototype of 500 W is fulfilled to deal with 400-V input and 24-V output, which has verified the accuracy of the theoretical analysis and validated the converter. Experimental results demonstrate that the ISDC achieves a peak efficiency of 92.74% at 350 W and 92.09% at full load. If synchronous rectifiers are employed, the peak efficiency can be up to 94.73%.

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A novel non-isolated step-down converter with low switch voltage stress

Bashirazami,

Amini,

Adib

et al. 2023

International Journal of Electronics

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A Nonisolated Soft Switching Interleaved Converter With Extended Duty Cycle and Low Output Current Ripple

Cited by 8 publications

References 23 publications

Novel Zero-Voltage Zero-Current Transition Buck Converter With Minimal Impact of Active Auxiliary Cell on Overall Dynamics

Novel Zero-Voltage Zero-Current Transition Buck Converter With Minimal Impact of Active Auxiliary Cell on Overall Dynamics

Interleaved step-down converter with capacitor-diode voltage splitter and minimum switches for low current ripple and extra-low voltage ratio

A novel non-isolated step-down converter with low switch voltage stress

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