Single-Phase Single-Stage Power-Factor-Corrected Converter Topologies

Moschopoulos, Gerry; Jain, Praveen

doi:10.1109/tie.2004.841148

Cited by 155 publications

(55 citation statements)

References 20 publications

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“…From Equations (19) and (20), the design equations for the resonant inductor L r and the chargepump capacitor C r1 can be derived as follows [22][23][24][25].…”

Section: Single-stage Led Backlight Circuitmentioning

confidence: 99%

Introduction to LED Backlight Driving Techniques for Liquid Crystal Display Panels

Chiu¹,

Lo²,

Pai³

et al. 2009

New Developments in Liquid Crystals

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“…From Equations (19) and (20), the design equations for the resonant inductor L r and the chargepump capacitor C r1 can be derived as follows [22][23][24][25].…”

Section: Single-stage Led Backlight Circuitmentioning

confidence: 99%

Introduction to LED Backlight Driving Techniques for Liquid Crystal Display Panels

Chiu¹,

Lo²,

Pai³

et al. 2009

New Developments in Liquid Crystals

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“…Moreover, while power factor has been traditionally considered important mainly at high power levels to best convey real power from the ac grid to a dc load [1], [2], it is of increasing concern at low power levels as well (e.g., 10s of watt) to reduce the conduction loss and voltage distortion in the grid.…”

Section: Introductionmentioning

confidence: 99%

“…At higher power levels (e.g., 75 watts and above) and in specific applications such as LED drivers, there are [4], [5]. One common method to achieve better line waveforms is to cascade a "Power Factor Correction (PFC)" circuit, a large electrolytic capacitor, and a dc-dc converter as illustrated in [1], [2]. In this approach, a front-end PFC circuit modulates the switch(es) so that it shapes the input current waveform over the ac-line cycle for high power factor (often providing a sine-wave or clipped-sine-wave input current waveform), and the associated twice-line frequency power fluctuation is then buffered by its large output capacitor (typically implemented with an electrolytic capacitor).…”

Section: Introductionmentioning

confidence: 99%

“…There are many converter topology options for the frontend PFC circuit including the boost converter [1], [2], [6] and buck converter [7]- [10]. However, these approaches are not amenable to converter miniaturization because: 1) it is hard to greatly reduce the volume of the converter through high-frequency operation owing to loss limits, large inductance (i.e., high characteristic impedance level), and large parasitic capacitance levels (e.g., large output capacitance of the switch) [11]- [13]; 2) the volume of the energy buffer capacitor is large, and 3) for a boost front end, the following dc-dc converter must operate at high voltage when it is tied to the stepped up (high) voltage after the boost PFC converter, and has a large step-down voltage conversion ratio (especially for low output voltage application), so that it is again difficult to be realized at high frequency with small volume.…”

Section: Introductionmentioning

confidence: 99%

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High-frequency isolated ac-dc converter with stacked architecture

Lim

Bandyopadhyay

Perreault

2017

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-This paper presents a new isolated ac-dc power converter achieving both high power factor and converter miniaturization suitable for many low power ac-dc applications. The proposed ac-dc converter architecture comprises a line-frequency rectifier, a stack of capacitors, a set of regulating converters, and a multi-input isolated bus converter. Among many suitable circuit implementations, the prototype system utilizes the resonanttransition buck converter as a regulating converter, and the capacitively-aided isolated bus converter for the isolated bus converter. The converter is miniaturized by operating at high frequency (1 -10 MHz range), and it buffers the ac-line frequency energy with a pair of stacked ceramic capacitors (1 µF and 150 µF, 100 V rating) without a requirement for electrolytic capacitors. The prototype converter is implemented to operate from 120 Vac to 12 V, and up to 50 W output as an example isolated ac-dc converter for power supply applications. The prototype converter demonstrates with 88 % efficiency and 0.86 power factor, and provides 50 W/in 3 power density, which is five times higher than the power density of typical conventional designs.

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“…In addition, the high switching frequency of the boost converter increases the power loss which reduces the efficiency and reliability of the converter. Several alternative single-stage ac-dc converter topologies with varying degrees of complexity and performance have been proposed in the literature [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Single-Stage AC-DC Converter with Reduced Line-Current Harmonics

Anani

Wiliamson²,

Ponnapalli³

2010

REPQJ

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Abstract. The circuit topology for a single-phase single stage ac-dc converter with the aim of minimising the converter's line current harmonics is presented. The circuit is based on the halfcontrolled ac-dc converter topology and employs active switching devices to achieve its objective. These devices are used to provide alternative paths for the line current during periods when the smoothing capacitor is supplying the load current, thus reducing the line current harmonics. Extensive simulation studies have been carried out on the circuit and results are presented and compared with the results obtained from a standard ac-dc uncontrolled converter operating under similar conditions. The results indicate that the line current harmonics are reduced to levels compliant with those set out by the relevant European Union's Directive, IEC61000-3-2, on harmonics injection into the supply mains directed at equipment that draws current 16 A ≤ .

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Single-Phase Single-Stage Power-Factor-Corrected Converter Topologies

Cited by 155 publications

References 20 publications

Introduction to LED Backlight Driving Techniques for Liquid Crystal Display Panels

Introduction to LED Backlight Driving Techniques for Liquid Crystal Display Panels

High-frequency isolated ac-dc converter with stacked architecture

Single-Phase Single-Stage AC-DC Converter with Reduced Line-Current Harmonics

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