Soft switching passive snubber cell for family of PWM DC–DC converters

Şahin, Yakup; Tınğ, Naim Süleyman

doi:10.1007/s00202-017-0655-7

Cited by 23 publications

(11 citation statements)

References 25 publications

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“…Following equations hold for this stage. The duration for v S1 to fall to zero can be adjusted by using (2) and (3). When v Cs reaches to V in , v S1 becomes zero, so, ZVT is achieved and the gate signal of S 1 can be applied.…”

Section: Operation Stagesmentioning

confidence: 99%

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New active snubber cell for high power isolated PWM DC–DC converters

Yeşilyurt¹,

Bodur²

2019

IET Circuits, Devices & Systems

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Here, a new active snubber cell for high-power isolated pulse-width-modulated (PWM) DC-DC converters is proposed. All semiconductor power devices in the proposed converters operate with full soft switching under a very wide load range, and they are not exposed to any voltage and current stress. The main switches turn on with zero-voltage transition (ZVT) and turn off with zero-voltage switching (ZVS). The auxiliary switches turn on with zero-current switching (ZCS) and turn off with ZVS. The theoretical analysis and design procedure for the proposed active snubber cell are carried out in detail and are verified with a half-bridge (HB) converter implementation having 20V output voltage, 50 A output current, and 80 kHz switching frequency. The overall efficiency of the HB DC-DC converter is increased from about 83% in the hard switching condition to about 90% thanks to the proposed active snubber cell.

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Section: Operation Stagesmentioning

confidence: 99%

“…However, in these devices, increasing the switching speed causes electromagnetic interference (EMI) to increase [2]. To decrease both switching losses and EMI in power converters, soft switching techniques are used [1,[3][4][5][6][7]. In PWM DC-DC converters, soft switching techniques are provided using snubber cells.…”

Section: Introductionmentioning

confidence: 99%

New active snubber cell for high power isolated PWM DC–DC converters

Yeşilyurt¹,

Bodur²

2019

IET Circuits, Devices & Systems

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show abstract

“…To maintain these desired attributes, in the principle an AC-DC boost converter ought to be working with the highest frequency as possible. However, the increase in the frequency induces large amount of switching losses and Electromagnetic Interface (EMI), exorbitant current and voltage stresses, declined efficiency and impractical application scenarios [8]- [11]. To circumvent these problems, the soft switching (SS) techniques are developed and replaced the hard switching The soft switching converters can be categorized as magnetic conductor and non-magnetic according to the structure of snubber cell.…”

Section: Introductionmentioning

confidence: 99%

A New Active Snubber Cell for Soft Switched Power Factor Correction Boost Converters

2019

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This paper introduces a new boost converter based soft switched active snubber cell for power factor correction. In this particular converter, the main switch is turned on by means of zero voltage transition (ZVT) and is turned off with the aid of zero voltage switching (ZVS). The main diode is turned on using ZVS and is turned off using zero current switching (ZCS). In the active snubber cell, the auxiliary switch is turned on by means of ZCS and is turned off using zero current transition (ZCT). No semiconductor device is exposed to the additional voltage stress. In this paper, theoretical analysis of the proposed converter is exhibited and this theoretical analysis is validated both with simulation and experimental study, while operating at 100 kHz switching frequency and 600 W output power. It is demonstrated that the proposed converter has 95.7% efficiency and 0.99 unit power factor at soft switching operation.

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“…These issues are mainly low power density, switching power losses, electromagnetic interference (EMI), high reverse recovery losses and so on. To eliminate these issues at high switching frequencies, the soft switching (SS) techniques are introduced in the literature [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Design and application of a novel snubber cell for soft switched pwm dc–dc converters

Şahin

Tınğ

2019

Sādhanā

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This paper introduces a novel active snubber cell for soft switching PWM DC-DC converters. In the proposed converter, the main switch is turned on under zero voltage transition (ZVT) and turned off under zero voltage switching (ZVS). The auxiliary switch and all of the other semiconductors in the converter are turned on and off with soft switching (SS). There is no extra voltage stress on the semiconductor devices. Besides, the proposed converter has simple structure and ease of control due to common ground. In this treatise, the theoretical and mathematical analysis of the proposed converter are presented and the design procedure of converters is also provided. The simulation study at 100 kHz switching frequency and 600 W output power are conducted. The experimental prototype of converter is operated under same conditions. Both the simulation and the experimental prototype exhibits similar performances. Ultimately, the efficiency of the proposed converter is 95.7% at nominal power.

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Soft switching passive snubber cell for family of PWM DC–DC converters

Cited by 23 publications

References 25 publications

New active snubber cell for high power isolated PWM DC–DC converters

New active snubber cell for high power isolated PWM DC–DC converters

A New Active Snubber Cell for Soft Switched Power Factor Correction Boost Converters

Design and application of a novel snubber cell for soft switched pwm dc–dc converters

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