A New Standby Structure Using Multi-Output Full-Bridge Converter Integrating Flyback Converter

Kim, Jae-Kuk; Choi, Sun Ha; Kim, Chong-Eun; Moon, Gun-Woo

doi:10.1109/tie.2011.2106101

Cited by 73 publications

(24 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 1 represents the comparison of loss components between the proposed work and the previous works in normal mode operation. As shown in the table, it can be noted that the previous works [15][16][17] have a switch, transformer, and rectifier diode as the loss components related to V out_STB in normal mode operation. On the other hand, the proposed structure has only two merge diodes (D a , D m ) as the loss components in normal mode operation, because the standby converter is in the off-state by STBvar.…”

Section: Resultsmentioning

confidence: 99%

“…It should be noted that the losses of the standby flyback converter always exist regardless of operating mode. Therefore, the standby converter degrades the total system's efficiency in entire load conditions [15][16][17][18][19][20]. Therefore, it is required to reduce the losses from the standby flyback converter.…”

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

“…For these reasons, standby-flyback-integrating structures have been studied in recent years [15][16][17][18][19][20]. By integrating the flyback converter into the main power conversion stage, these works reduced switching losses, resulting in the improved efficiency of the system.…”

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

“…By integrating the flyback converter into the main power conversion stage, these works reduced switching losses, resulting in the improved efficiency of the system. However, approaches in [15][16][17] require additional components and complex control signals. Also, the core loss of the flyback converter is always produced.…”

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

“…In this case, only a small output power is required to monitor the system status, so only the standby flyback converter with a small output power rating provides the standby output power. For the standby output, the flyback converter is widely used because of its small size and wide input-range capability [15][16][17][18]. Since Vout_STB should be regulated tightly, it is used for the feedback of the duty cycle of the standby converter.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Standby-Loss Elimination in Server Power Supply

2017

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Standby-Loss Elimination in Server Power Supply

2017

Self Cite

View full text Add to dashboard Cite

show abstract

Single‐stage triple‐output Cuk power factor correction converter

Yan,

Wen,

Xia

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryTraditional multiple‐output AC‐DC power supply with power factor correction (PFC) function usually employs a two‐stage cascaded topology that is composed of prestage PFC converter and N independent poststage DC‐DC converters to achieve PFC and voltage or current regulation of N outputs. Hence, the conventional two‐stage cascaded multiple‐output AC‐DC power supply needs N + 1 magnetic components as power inductors or transformers and N + 1 controllers, which increases the cost and size of the multioutput converters. The conventional multiple‐string AC‐DC LED driving circuits usually employ a two‐stage topology to realize PFC and independent current regulation of each LED string. To address the issue of complexity, high cost, and large size of the two‐stage multistring LED driving circuit, a single‐stage triple‐output Cuk PFC converter is proposed by cascading boost converter and single‐inductor triple‐output buck converter with sharing main power switch in this paper. The topology operation principle, control strategy, design consideration, and operation characteristics of the proposed circuit are investigated in detail. With the switch sharing and inductor multiplexing technologies at the same time, the proposed converter utilizes only single‐stage converter to achieve PFC function, independent regulation of triple‐channel output current, and flicker‐free with low twice line frequency LED current ripple. The proposed converter is verified by a 50‐W experimental prototype of LED driver for triple string LEDs. The proposed converter only uses two power inductors and a set of controller to achieve greater than 0.945 PF, up to 90.5% efficiency, low LED current ripple, and independent current regulation for triple LED strings with different forward voltage, which may significantly reduce the cost and size of the traditional AC‐DC multistring LED driving circuit.

show abstract

Design and development of variable frequency modulation-based isolated DC–DC converter with green mode of operation

Kumar,

Singh

et al. 2024

Electr Eng

View full text Add to dashboard Cite

Amongst many applications of DC-DC isolated converters, power supplies, renewable energy sources, and electric vehicles are prominent. These converters are the basic, easy to use, low component count and being used in industry from a few decades. In this study, a unique operation mode of DC-DC isolated converter called "green mode" is proposed to increase the efficiency of converter under light load conditions. Switching losses of the converter can be reduced by using the converter's secondary-side control method, which enables a reduction in the primary-side switches' switching frequency and turn-off duration. The converter also uses a soft switching mechanism to further minimize the switching losses. The efficiency of the converter has significantly improved, due to reduced power losses under light load conditions, which has been demonstrated through experimental data that validates the green-mode operation. These DC-DC converters shall enhance the range of electric vehicle (EV) and shall be a boon to EV technology.

show abstract

A New Standby Structure Using Multi-Output Full-Bridge Converter Integrating Flyback Converter

Cited by 73 publications

References 9 publications

Standby-Loss Elimination in Server Power Supply

Standby-Loss Elimination in Server Power Supply

Single‐stage triple‐output Cuk power factor correction converter

Design and development of variable frequency modulation-based isolated DC–DC converter with green mode of operation

Contact Info

Product

Resources

About