Variable Delay Time Method in the Phase-Shifted Full-Bridge Converter for Reduced Power Consumption Under Light Load Conditions

Kim, Duk-You; Kim, Chong-Eun; Moon, Gun-Woo

doi:10.1109/tpel.2013.2237926

Cited by 56 publications

(39 citation statements)

References 27 publications

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“…The phase shifted full bridge pulse width modulated converter and resonant converters are usually preferred [1], [10]- [13]. The soft switching operation of phase shifted full bridge converter becomes poor under light load conditions [14], [15]. However, battery charger works mostly under light load or no load conditions when battery is completely charged.…”

Section: Introductionmentioning

confidence: 99%

High efficiency design approach of a LLC resonant converter for on-board electrical vehicle battery charge applications

Çetin¹

2017

Pamukkale J Eng Sci

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Section: Introductionmentioning

confidence: 99%

High efficiency design approach of a LLC resonant converter for on-board electrical vehicle battery charge applications

Çetin¹

2017

Pamukkale J Eng Sci

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“…The DC/DC stage provides tightly regulated output voltage (V out_main ). In this stage, a phase-shifted full-bridge (PSFB) converter is widely used because of small root-mean-square (RMS) current and zero-voltage-switching (ZVS) [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Standby-Loss Elimination in Server Power Supply

2017

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Abstract:In a server power system, a standby converter is required in order to provide the standby output, monitor the system's status, and communicate with the server power system. Since these functions are always required, losses from the standby converter are produced even though the system operates in normal mode. For these reasons, the losses deteriorate the total efficiency of the system. In this paper, a new structure is proposed to eliminate the losses from the standby converter of a server power supply. The key feature of the proposed structure is that the main direct current (DC)/DC converter substitutes all of the output power of the standby converter, and the standby converter is turned off in normal mode. With the proposed structure, the losses from the standby converter can be eliminated in normal mode, and this leads to a higher efficiency in overall load conditions. Although the structure has been proposed in the previous work, very important issues such as a steady state analysis, the transient responses, and how to control the standby converter are not discussed. This paper presents these issues further. The feasibility of the proposed structure has been verified with 400 V link voltage, 12 V/62.5 A main output, and a 12 V/2.1 A standby output server power system.

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“…This type of converter has been extensively studied in the literature, including modeling, design optimization, control method, flux bias compensation, improved full-bridge topologies, etc. [6]- [10].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Parasitic Elements on Spurious Turn-On in Phase-Shifted Full-Bridge Converters

Wang¹

2016

Journal of Power Electronics

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This paper presents a comprehensive analysis of the spurious turn-on phenomena in phase-shifted full-bridge (PSFB) converters. The conventional analysis of the spurious turn-on phenomenon does not establish in the PSFB converter as realizing zero voltage switching (ZVS). Firstly, a circuit model is proposed taking into account the parasitic capacitors and inductors of the transistors, as well as the parasitic elements of the power circuit loop. Second, an exhaustive investigation into the impact of all these parasitic elements on the spurious turn-on is conducted. It has been found that the spurious turn-on phenomenon is mainly attributed to the parasitic inductors of the power circuit loop, while the parasitic inductors of the transistors have a weak impact on this phenomenon. In addition, the operation principle of the PSFB converter makes the leading and lagging legs have distinguished differences with respect to the spurious turn-on problems. Design guidelines are given based on the theoretical analysis. Finally, detailed simulation and experimental results obtained with a 1.5 kW PSFB converter are given to validate proposed analysis.

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Variable Delay Time Method in the Phase-Shifted Full-Bridge Converter for Reduced Power Consumption Under Light Load Conditions

Cited by 56 publications

References 27 publications

High efficiency design approach of a LLC resonant converter for on-board electrical vehicle battery charge applications

High efficiency design approach of a LLC resonant converter for on-board electrical vehicle battery charge applications

Standby-Loss Elimination in Server Power Supply

The Impact of Parasitic Elements on Spurious Turn-On in Phase-Shifted Full-Bridge Converters

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