State-of-the-Art Review on Soft-Switching Technologies for Non-Isolated DC-DC Converters

Cheng, Xu-Feng; Liu, Chenyang; Wang, Dianlong; Zhang, Yong

doi:10.1109/access.2021.3107861

Cited by 59 publications

(19 citation statements)

References 145 publications

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“…According to the auxiliary circuit structure (whether there are auxiliary circuits or active devices), the soft-switching technologies of non-isolated DC-DC converters are divided into three categories: control-only technology (COT), non-auxiliary switch technol-ogy (NAST), and auxiliary switch technology (AST) [23]. COT does not use any auxiliary devices, and it is only through the adjustment of the circuit parameters and a change in the switching control method that soft switching is achieved.…”

Section: Hard Switching and Soft Switchingmentioning

confidence: 99%

Review of Voltage-Bucking/Boosting Techniques, Topologies, and Applications

Wang

2023

Energies

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As non-isolated step-up and step-down DC–DC converters are at present widely used in various fields, this review will summarize and introduce non-isolated step-up and step-down DC–DC converters in various aspects. First of all, the origin and development of power electronics technology and the generation and principle of certain basic non-isolated step-up and step-down DC–DC converters are briefly stated. Subsequently, according to their different characteristics, including whether they are unidirectional or bidirectional, voltage-fed or current-fed, or hard-switching or soft-switching, the review will classify them and analyze their advantages and disadvantages. Meanwhile, in order to change the voltage gains of the DC–DC converters, different voltage change techniques are applied to them. The review will elaborate on the four technologies (switched capacitors, voltage multipliers, switched inductors and different ways of connecting), providing examples and analyzing the topologies in which they are applied, before summarizing the advantages and disadvantages of these techniques. Finally, this review will describe the specific applications of non-isolated step-up and step-down DC–DC converters and the reasons behind their ubiquity and popularity. Although the performances of current DC–DC converter topologies are good, there continues to be increasing demand, an updating of the topology structure, and improvements in terms of their performance. In the future, DC–DC converters will play a more important role in industrial production and people’s lives.

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Section: Hard Switching and Soft Switchingmentioning

confidence: 99%

Review of Voltage-Bucking/Boosting Techniques, Topologies, and Applications

Wang

2023

Energies

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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%

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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“…Soft switching technique has been procured instead of hard switching to reduce the high switching loss that occurred due to the large dv/dt, di/dt during switching on and off for high frequency on the output of EV converters as shown in Figure 2. The implementation of the soft switching approach needs a greater number of components and it makes the circuit operation complex [10]. After the filter and shielding approach randomization technique comes into the picture.…”

Section: Introductionmentioning

confidence: 99%

A comparison statement on DCPWM based conducted EMI noise mitigation process in DC-DC converters for EV

Kalaiarasu

Natarajan

2023

Bulletin EEI

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Fast switching techniques at high frequencies are employed for quick charging and energy conversion in electric vehicle (EV) power converters. Electromagnetic interference (EMI) noise is produced due to the fast-switching process, which may result in malfunctioning and degraded EV performance. In this work, a digital chaotic pulse width modulation (DCPWM) technique-based EMI noise mitigation process has been applied to elementary positive output super lift Luo (EPOSLL), two-stage cascaded boost (TSCB), and ultra-lift Luo (ULL) converters, and a comparison study has been conducted with EMI reduction levels as per electromagnetic compatibility (EMC) standards. The duty cycle is varied from 0.5 to 0.67 to get the desired output voltage as an input of 10V to achieve the power ratings of 40 W to 80 W for various load conditions. A total of 4 dBV (3 V) to 15 dBV (10 V) of conducted EMI noise has been mitigated for the above-said converters. Simulation results based on power spectrum density and hardware results based on fast fourier transform (FFT) of output voltages are analyzed. According to the findings, the ULL converter is more acceptable for electromagnetic compatibility in EV applications than EPOSLL and TSCB DC-DC converters.

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State-of-the-Art Review on Soft-Switching Technologies for Non-Isolated DC-DC Converters

Cited by 59 publications

References 145 publications

Review of Voltage-Bucking/Boosting Techniques, Topologies, and Applications

Review of Voltage-Bucking/Boosting Techniques, Topologies, and Applications

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

A comparison statement on DCPWM based conducted EMI noise mitigation process in DC-DC converters for EV

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