Soft switching active snubbers for DC/DC converters

Elasser, Ahmed; Torrey, D.A.

doi:10.1109/63.535403

Cited by 131 publications

(37 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also the main switch experiences the recovery current at switch turn-on [25] and energy is fed into the output circuit, which is a variable voltage; therefore portion of the reset period is not only load current dependant but also duty cycle dependant [25]. …”

Section: Operational Constraintsmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

View full text Add to dashboard Cite

-Of the single-switch dc-to-dc converters, those with the buck-boost voltage transfer function offer the best potential for transformer coupling, hence isolation, at the kilowatt level. This paper highlights the limitations of the traditional magnetic coupled, buck-boost topology. Then four split-capacitor transformer-coupled topologies (specifically the Cuk, sepic, zeta, and new converters) with a common ac equivalent circuit, that do not temporarily store core magnetic energy as does the traditional isolated buckboost converter nor have a core dc magnetizing current bias as with the sepic and zeta transformer coupled topologies, are explored. Core dc bias capacitive voltage compensation is a practical design constraint in three of the four topologies, while all four must cater for stray and leakage inductance effects. Simulations and experimental results for the new converter at 408W that support the transformercoupled, single-switch dc-to-dc converter concepts are investigated.

show abstract

Section: Operational Constraintsmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

View full text Add to dashboard Cite

show abstract

“…Switching losses are significantly reduced by means of the commutations that are realised with either zero-voltage switching (ZVS) or zero-current switching (ZCS). However, in these types of converters, excessive voltage and current stresses occur, and power density is lower and control is harder than normal PWM converters [1,2,6].…”

Section: Introductionmentioning

confidence: 99%

“…The recently developed zero-voltage transition (ZVT) and zero-current transition (ZCT) [1] PWM techniques incorporate SS function into PWM converters, so that the switching losses can be reduced with minimum voltage/ current stresses and circulating energy. The ZVT technique forces the voltage of an incoming switch to zero before its turn-on, to practically eliminate switch turn-on loss.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Zero-voltage transition–zero-current transition pulsewidth modulation DC–DC buck converter with zero-voltage switching–zero-current switching auxiliary circuit

Ürgün

2012

IET Pwr. Electr.

View full text Add to dashboard Cite

In this study, a new zero-voltage transition (ZVT) -zero-current transition (ZCT) quasi-resonant buck converter, which ensures zero crossings at any time required for soft switching (SS) and provides ZVT turn-on and ZCT turn-off together for the main switch of active snubber cell in buck converter is presented. The proposed circuit combines the most of the advantageous features of the circuits presented previously and overcomes most of drawbacks of these circuits by using only one auxiliary switch with fewer other components. Consequently, new ZVT -ZCT quasi-resonant buck converter, which is verified by a prototype of a 0.4-kW and 100-kHz circuit, is analysed in detail. All semiconductor devices operate under SS, the main switch is subjected to no additional voltage and current stresses, and the stress on the auxiliary switch is very low in the proposed new converter.

show abstract

“…From the above description, power converters with ZVS/ZCS turn-on techniques are effective means for solving or alleviating switching losses and EMI problems [18][19][20][21][22]. In this paper, a soft-switching SEPIC with multi-output sources is proposed, as shown in Figure 7.…”

Section: Introductionmentioning

confidence: 99%

A Soft-Switching SEPIC with Multi-Output Sources

Tsai

2017

Electronics

View full text Add to dashboard Cite

Abstract:In this paper, a soft-switching single-ended-primary-inductance converter (SEPIC) with multi-output sources is proposed. The proposed SEPIC has the following advantages: (1) The conversion efficiency can be increased. To incorporate a soft-switching cell with a flyback-type, the power switches can achieve zero-voltage-switching (ZVS) and zero-current-switching (ZCS) features under turn-on transitions, resulting in reducing the switching losses and electromagnetic interference (EMI); (2) The applicability can be maximized. To apply the voltage ratio of the transformers, the proposed SEPIC has multi-output sources with step-up/down voltage functions. Finally, a prototype of the soft-switching SEPIC with multi-output sources is built and implemented. Simulated and experimental results are presented to verify the performance and the feasibility of the proposed soft-switching SEPIC with multi-output sources.

show abstract

Soft switching active snubbers for DC/DC converters

Cited by 131 publications

References 9 publications

Transformer Isolated Buck-Boost Converters

Transformer Isolated Buck-Boost Converters

Zero-voltage transition–zero-current transition pulsewidth modulation DC–DC buck converter with zero-voltage switching–zero-current switching auxiliary circuit

A Soft-Switching SEPIC with Multi-Output Sources

Contact Info

Product

Resources

About