Dynamics analysis of a low-voltage stress single-stage high-power factor correction ac/dc flyback converter

Yang, Sung‐Pei; Chen, S.J.; Lin, Ja‐Chen

doi:10.1049/iet-pel.2012.0201

Cited by 17 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of single-stage AC/DC converters have been proposed in the literature [16][17][18][19][20][21]. Commonly a full bridge diode rectifier has been employed at the front-end of DC/DC converters [22][23][24][25][26], but four diodes operating at line frequency results in high conduction losses, thus dropping the efficiency of the converter.…”

Section: Ac-dc Convertermentioning

confidence: 99%

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

et al. 2017

View full text Add to dashboard Cite

Uninterruptible power supplies (UPSs) are widely used to deliver reliable and high quality power to critical loads under all grid conditions. This paper proposes a high-frequency isolated online UPS system for low power applications. The proposed UPS consists of a single-stage AC-DC converter, boost DC-DC converter, and an inverter. The single-stage AC-DC converter provides galvanic isolation, input power factor correction, and continuous conduction of both input and output current. The low battery bank voltage is stepped up to high dc-link voltage by employing a high voltage gain boost converter, thus allows the reduction of battery bank to only 24 V parallel connected batteries. Operating batteries in parallel improves the battery performance and resolves the issues related to conventional battery banks that arrange the batteries in series combination. The inverter provides regulated output voltage to the load. A new cascaded slide mode (SM) and proportional-resonant (PR) control for the inverter has been proposed, which regulates the output voltage for both linear and non-linear loads. The controller shows excellent performance during load transients and step changes. Besides, the controller for boost converter and AC-DC converter is presented. Operating principle and experimental results of 1 kVA laboratory setup have been presented for the validation of proposed system.

show abstract

Section: Ac-dc Convertermentioning

confidence: 99%

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Therefore, high power factor converters (HPFC) has became the inherent part of AC-DC conversion because of its important features like conversion at unity power factor with higher efficiency, reduced size and well regulated dc output [4][5][6][7][8]. But these high power factor converters using high voltage rating devices are having limitations such as large dv/dt, large voltage stress across switching device, large common mode voltage generation, high switching frequency etc.…”

Section: Introductionmentioning

confidence: 99%

Neutral Point Potential Control for Three Phase 3 - level Neutral Point Clamped Active Front End Converter

Ojha¹,

Chaturvedi²,

Mittal³

et al. 2017

ijeei

View full text Add to dashboard Cite

The use of power electronic converters influences the generation of harmonics and reactive power flow in power system. Therefore, three-phase multilevel improved power quality AC-DC converters are gaining lot of popularity in power conversion applications. This work deals with critical problem of multilevel structure i.e neutral point potential (NPP) variation. In this paper, a simplified current controlled scheme is presented to ensure unity power factor operation. Neutral point potential (NPP) of three-phase, 3-level NPC AC-DC converter is controlled by modifying control signal in the controller using NPP regulator. An auxiliary circuit is being presented in this paper as an alternative option for controlling the neutral point potential of the converter. Comparison has been carried out between these control techniques in terms of power quality. A complete mathematical model is presented for better understanding of both techniques used for NPP control. The presented control techniques has been verified through simulation investigations and validated experimentally on the developed laboratory prototype.

show abstract

“…With continuous improved requirements of the performance and efficiency, digital controlled flyback power supply has drawn more and more attention [1][2][3]. Meanwhile, compared with the traditional secondary-side feedback control topology [4][5][6][7], the primary-side controlled flyback converter samples the output voltage through auxiliary winding of transformer, but not directly from the load. The advantage is the elimination of the opto-coupler, which saves the spaces on the board, reduces cost and improves the reliability [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

High precision constant voltage digital control scheme for primary‐side controlled flyback converter

Zhang

Wang

et al. 2016

IET Power Electronics

View full text Add to dashboard Cite

To improve the constant output voltage accuracy of primary-side controlled flyback converter, this study described a digital control scheme based on accurate sampling and cable voltage drop compensation. The voltage drops of output diode and the cable were analysed first, they were two most important factors that influence the accuracy of output voltage. Then, an accurate sampling method that can eliminate the voltage drop of the output diode was proposed. With output current estimating and digital resistance capacitance (RC) filter, the compensation of cable voltage drop was also designed. Finally, the software simulation and prototype test results verified the proposed scheme, and the constant voltage accuracy of the prototype achieved −0.6 ∼ +0.6%.

show abstract

Dynamics analysis of a low-voltage stress single-stage high-power factor correction ac/dc flyback converter

Cited by 17 publications

References 10 publications

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

Neutral Point Potential Control for Three Phase 3 - level Neutral Point Clamped Active Front End Converter

High precision constant voltage digital control scheme for primary‐side controlled flyback converter

Contact Info

Product

Resources

About