A single-switch single-stage active power factor corrector with high quality input and output

Schenk, K. F.; Cuk, S.

doi:10.1109/pesc.1997.616753

Cited by 35 publications

(14 citation statements)

References 4 publications

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“…The characteristic marker of these rectifiers is that the energy storage capacitor is in the series path of the energy flow. Synthesis of single stage PFC by inserting a diode in front of the Cuk and Sepic converters have resulted in the same topologies [4], [5]. The dc-bus capacitor voltage has a strong dependency on the output load.…”

Section: Topologiesmentioning

confidence: 99%

“…Articles [4], [6] use frequency modulation method to keep the dc-bus voltage under control during light load. Article [5] shows a new operation mode for the Sepic converter that operates both the boost like ICS and the DC/DC converter in DCM, which has effectively reduced the DC-bus voltage and significantly improved the input current waveform. Topological variations are also found in many other forms.…”

Section: Topologiesmentioning

confidence: 99%

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Power Factor Improvement With High Efficiency Converters

Babu¹,

Chandrudu²

2012

IOSRJEN

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Abstract-New recommendations and future standards have increased the interest in power factor improvement circuits.There are multiple solutions in which line current is sinusoidal. In addition, in the recent years, a great number of circuits have been proposed with non sinusoidal line current. In the proposed circuit, the power factor is improved by using an auxiliary winding coupled to the transformer of a cascade DC/DC fly back converter. The auxiliary winding is placed between the input rectifier and the low-frequency filter capacitor to serve as a magnetic switch to drive an input inductor. The proposed approach is primarily based on the concept of inductive effect, from which PFC cells composed of energy buffers and high-frequency signals are introduced. Since the DC/DC fly back converter is operated at high-switching frequency, the auxiliary windings produce a high frequency pulsating source such that the input current conduction angle is significantly lengthened and the input current harmonics is reduced. Properly selecting an eligible PFC cell and inserting it in between input rectifier and dc-link capacitor can yield an SSC which can improve the input power factor significantly.

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Section: Topologiesmentioning

confidence: 99%

Section: Topologiesmentioning

confidence: 99%

Power Factor Improvement With High Efficiency Converters

Babu¹,

Chandrudu²

2012

IOSRJEN

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“…A straight-forward construction involves a simple zero-order switching network followed by a switching regulator [12][13][14][15][16]. shows the block diagram of such a circuit.…”

Section: Switching Regulators With Power Factor Correction-conventionmentioning

confidence: 99%

“…One of these is the conventional cascade conÿguration in which a PFC stage is cascading with a dc=dc converter stage [3][4][5][12][13][14][15][16]. The other 15 have non-cascading structures which, as shown above, have a higher e ciency compared to the cascade conÿguration.…”

Section: Derivation Of Practical Pfc Voltage Regulator Circuits With mentioning

confidence: 99%

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Circuit theory of power factor correction in switching converters

Tse

2003

Circuit Theory & Apps

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SUMMARYThis paper discusses the circuit theory aspects of power factor correction in switching converter circuits. The discussion begins with an examination of the requirement of power factor correction in dc=dc converters. Using the concept of zero-order converter circuits, su cient conditions for a dc=dc converter circuit to provide power factor correction are derived. The duality principle is applied to generate new converter circuits that can achieve power factor correction. The practical application of power factor correction is considered in conjunction with the requirement of tight output voltage regulation. Detailed study of the circuit conÿguration that can simultaneously provide power factor correction and output regulation is given. Based on a general three-port model, the voltage regulator with power factor correction capability is studied in terms of the power ow between the input port, output port and energy storage port. A detailed consideration of the power ow among the three ports leads to the derivation of all possible minimal conÿgurations that can achieve power factor correction and voltage regulation. The e ciencies of these minimal conÿgurations are studied theoretically, leading to the concept of 'reduced redundant power processing' which provides important clue to e ciency improvement. Another issue addressed in this paper is the synthesis of practical circuits that can provide power factor correction and output regulation. In particular, four practical minimal conÿgurations that achieve reduced redundant power processing are considered. A systematic synthesis procedure is derived for creating converter circuits that achieve power factor correction and output voltage regulation. The control issue is also investigated in depth, pinpointing the basic requirement on the number of control parameters needed and its relationship with the operating mode.

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A universal‐input high‐power‐factor power supply without electrolytic capacitor for multiple lighting LED lamps

Lai

Feng

et al. 2011

Circuit Theory & Apps

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SUMMARYThe AC-DC power supply for LED lighting application requires a long lifetime while maintaining highefficiency, high power factor and low cost. However, a typical design uses electrolytic capacitor as storage capacitor, which is not only bulky but also with short life span, thus hampering performance improvement of the entire LED lighting system. In this article, a SEPIC-derived power factor correction topology is proposed as the first stage for driving multiple lighting LED lamps. Along with a relatively large voltage ripple allowable in a two-stage design, the proposal of LED lamp driver is able to eliminate the electrolytic capacitor while maintaining high power factor and high efficiency. To further increase the efficiency of LED driver, we introduced and used the twin-bus buck converter as the second-stage current regulator with Pulse Width Modulation (PWM) dimming function. The basic operating principle and the deign consideration are discussed in detail. A 50-W prototype has been built and tested to verify the proposal.

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A single-switch single-stage active power factor corrector with high quality input and output

Cited by 35 publications

References 4 publications

Power Factor Improvement With High Efficiency Converters

Power Factor Improvement With High Efficiency Converters

Circuit theory of power factor correction in switching converters

A universal‐input high‐power‐factor power supply without electrolytic capacitor for multiple lighting LED lamps

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