An Improved ZCT-PWM DC–DC Converter for High-Power and Frequency Applications

Bodur, Haci; Bakan, Ahmet

doi:10.1109/tie.2003.822091

Cited by 42 publications

(24 citation statements)

References 13 publications

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“…In some of the previously proposed bidirectional converters [2]- [6] two auxiliary circuits are employed to achieve soft switching when the power flows in both directions ( Fig. 1.9).…”

Section: Soft-switching In Pwm Bidirectional Dc-dc Convertersmentioning

confidence: 99%

Soft‐Switching DC‐DC Converters

Kazimierczuk

2008

Pulse‐Width Modulated DC‐DC Power Converters

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“…In some of the previously proposed bidirectional converters [2]- [6] two auxiliary circuits are employed to achieve soft switching when the power flows in both directions ( Fig. 1.9).…”

Section: Soft-switching In Pwm Bidirectional Dc-dc Convertersmentioning

confidence: 99%

Soft‐Switching DC‐DC Converters

Kazimierczuk

2008

Pulse‐Width Modulated DC‐DC Power Converters

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“…High switching frequency operation, however, results in higher switching losses, increased electromagnetic interference (EMI), and reduced converter efficiency. Numerous soft-switching techniques have been proposed to correct these problems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Almost all these techniques achieve soft switching condition in the main switch using an active auxiliary circuit.…”

Section: Introductionmentioning

confidence: 99%

“…In order to improving these problems in converters, zero-voltage transition (ZVT) and zero-current transition (ZCT) converters are developed [13][14][15][16]. ZVT and ZCT converters have the advantages of resonant and quasi-resonant converters like low EMI, and the resonances are limited with switching instances, and therefore the converter operates like a regular PWM converter, but in these converters, an auxiliary circuit containing resonant elements and auxiliary switches are used, and need complexity control system.…”

Section: Introductionmentioning

confidence: 99%

Analysis, Design and Implementation of an Improved ZVZCS-PWM Forward converter

Soltanzadeh¹,

Dehghani²,

Khalilian³

2014

Journal of Electrical Engineering and Technology

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-In this paper an Improved Zero Voltage Zero Current Pulse Width Modulation Forward converter which employs a simple resonance snubber circuit is introduced. A simple snubber circuit consists of a capacitor, an inductor and two diodes. In proposed converter, switch Q1 operates at ZCS turn-on, and ZVS turn-off conditions and all-passive semiconductor devices operate at ZVZCS turn-on and turn-off state. The proposed converter is analyzed and various operating modes of the ZVZCS-PWM forward converter are discussed. Analysis and design considerations are presented and the prototype experimental results of a 100w (40 V/2.5A) proposed converter operating at 30 KHz switching frequency confirm the validity of theoretical analysis.

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“…To alleviate these problems, significant derating of device voltage and current ratings and elaborate passive snubbers are usually used, and the switching frequency is limited to low-frequency ranges. Generally, a snubber circuit reduces the switching loss and switching stresses of switches, however, increases the total power loss in the converter [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…However, they have still additional current stress on the main switch [3, 4, 8, 9, 13 -15]. Similarly, the auxiliary switch turns on hard in the converter in [12], and the auxilary switch turns off partial hard and has an additional voltage stress in the converter in [3,4,9]. The total time of the transient periods is long in the circuits in [1,3,4,6,15].…”

Section: Introductionmentioning

confidence: 99%

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

Ürgün

2012

IET Power Electron.

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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.

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An Improved ZCT-PWM DC–DC Converter for High-Power and Frequency Applications

Cited by 42 publications

References 13 publications

Soft‐Switching DC‐DC Converters

Soft‐Switching DC‐DC Converters

Analysis, Design and Implementation of an Improved ZVZCS-PWM Forward converter

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

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