On/Off Control of Boost PFC Converters to Improve Light-Load Efficiency in Paralleled Power Supply Units for Servers

Kim, Hyoung-Suk; Kim, Jae-Kuk; Park, Ki-Bum; Seong, Hyun-Wook; Moon, Gun-Woo; Youn, Myung-Joong

doi:10.1109/tie.2013.2258301

Cited by 47 publications

(12 citation statements)

References 27 publications

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“…The keying method is another method of generating the ASK signal. Binary ASK is also known as on-off control (OOK) [9]. The most typical implementation is achieved by using a key to control the output of the carrier oscillator [10].…”

Section: Ask Modulation and Demodulation Principlementioning

confidence: 99%

Analysis and Simulation of 2ASK Digital Band-pass Transmission System Basing on SIMULINK

Wang¹,

Cheng²

2017

Proceedings of the 2016 7th International Conference on Education, Management, Computer and Medicine (EMCM 2016)

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Abstract. Digital modulation and demodulation system as an important part of digital communication system, its research is necessary. Based on the analysis of 2ASK digital band-pass system transmission characteristics, SIMULINK software is used to simulate the digital band-pass transmission system. Having been fully considered the possible factors affecting the 2ASK signal in the transmission process, a basic model of 2ASK digital band-pass transmission system is established, a system model which can simulate and realize the function of 2ASK digital band-pass signal transmission. Debugging and testing show that the waveforms of the system are consistent with the theoretical analysis and error-free code transmission can be achieved; the symbol error rate is rising with the increase of noise, which indicates that the system design is effective and reasonable. It is worth reference for related research and the improvement of such system, and also provides a new way for system design and experimental teaching.

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Section: Ask Modulation and Demodulation Principlementioning

confidence: 99%

Analysis and Simulation of 2ASK Digital Band-pass Transmission System Basing on SIMULINK

Wang¹,

Cheng²

2017

Proceedings of the 2016 7th International Conference on Education, Management, Computer and Medicine (EMCM 2016)

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“…For the CRM boost PFC converter with COT control, its main power switch will be turned on when the inductor current is equal to zero. Therefore, its switching period is variable and can be derived as (4). By combining (3) and (4), the absolute input current for CRM boost PFC converter can be modified as (5) [15].…”

Section: The Causes Of Line Current Distortionmentioning

confidence: 99%

Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

Chen

2016

IEEE Trans. Power Electron.

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This paper proposes a line current distortion compensation method, which is a fusion of the conventional variable on-time (VOT) control and the average current mode (ACM) control, for DCM/CRM boost PFC converter with zero current switching (ZCS)/ zero voltage switching (ZVS)/ valley switching (VS)/ switching frequency limitation (SFL) functions. In this paper, the mathematical analyses of the line current distortion for the DCM/CRM boost PFC converter with ZCS/ZVS/VS/SFL functions are also derived to explain the causes of the line current distortion. In order to increase efficiency, the ZVS/VS/SFL functions are needed but the line current will be further distorted. To compensate the distorted line current, the ACM-based VOT (ABVOT) control for the DCM/CRM boost PFC converter is proposed. In addition, the constant-on-time-based noise-immunity S/H method is proposed to replace the multiplier, which is always needed for the conventional ACM-based control. The performance of the proposed ABVOT control with S/H method will be demonstrated by simulation and experiment results.Index terms -power factor correction (PFC), variable on-time (VOT), average current mode (ACM), multiplierless.

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“…Among these devices, PFCs are by far the most commonly considered in low power single-phase applications due to their high simplicity and low costs compared to other known solutions. One of most widely used PFCs is the Boost converter [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. This structure is characterized by its simplicity due to the reduced number of components, and its good performance in terms of AC current tracking and DC voltage regulation.…”

Section: Introductionmentioning

confidence: 99%

Power Factor Correction With a Modified Sheppard–Taylor Topology Operating in Discontinuous Capacitor Voltage Mode and Low Output Voltage

Kanaan

Somers

Al‐Haddad

2015

IEEE J. Emerg. Sel. Topics Power Electron.

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In this paper, a modified Sheppard-Taylor converter operating in Continuous Inductor Current Mode and Discontinuous Capacitor Voltage Mode (CICM/DCVM) is studied and implemented. The operation sequences are described and the averaged model of the converter over a switching cycle is developed. Based on the obtained, the DC characteristics of the converter were derived, and design criteria for components selection to ensure DCVM operation were reported. The converter is then used for Power Factor Correction (PFC) in a single-phase rectifier with a front-end diode-bridge. This mode of operation provides the converter some desirable features: zero-voltage turn-off switching and natural purely resistive behavior at low DC output voltage level. This can be achieved by using simply an open-loop control, which offers better reliability than the CICM/CCVM previously reported in the literature, where feedback control is required. The theoretical study of the converter is presented and validated through experimental measurements carried out on a 500W laboratory prototype. It is shown that this rectifier exhibits an input power factor higher than 99.7% and a source current distortion lower than 6% at small output voltage level.

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On/Off Control of Boost PFC Converters to Improve Light-Load Efficiency in Paralleled Power Supply Units for Servers

Cited by 47 publications

References 27 publications

Analysis and Simulation of 2ASK Digital Band-pass Transmission System Basing on SIMULINK

Analysis and Simulation of 2ASK Digital Band-pass Transmission System Basing on SIMULINK

Line Current Distortion Compensation for DCM/CRM Boost PFC Converters

Power Factor Correction With a Modified Sheppard–Taylor Topology Operating in Discontinuous Capacitor Voltage Mode and Low Output Voltage

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