On the Limit of the Output Capacitor Reduction in Power-Factor Correctors by Distorting the Line Input Current

Lamar, Diego G.; Sebastián, J.; Arias, Manuel; Fernández, Arturo

doi:10.1109/tpel.2010.2075943

Cited by 94 publications

(31 citation statements)

References 14 publications

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“…Some authors have presented solutions to replace this electrolytic capacitor by other technology (i.e., MKT, MKP, and ceramic). However, these solutions are suitable for ac-dc power supplies based on two-stage structures [26], [27]. The first stage is a boost PFC that draws a sinusoidal input current allowing relatively high low-frequency output-voltage ripple.…”

Section: Appendix Design Considerations Of the Output Capacitor In Comentioning

confidence: 99%

Design-Oriented Analysis and Performance Evaluation of a Low-Cost High-Brightness LED Driver Based on Flyback Power Factor Corrector

Lamar

Arias

Rodríguez

et al. 2013

IEEE Trans. Ind. Electron.

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Abstract-This paper presents a new control strategy for power factor correctors (PFCs) used to drive high-brightness lightemitting diodes (HB-LEDs). This control strategy is extremely simple and is based on the use of standard peak-current-mode integrated controllers (PCMICs), reducing its cost and complexity in comparison to traditional PFC controllers. In fact, this method is an alternative implementation of the one-cycle control to PFCs belonging to the flyback family of converters, without introducing high complexity for reducing the total harmonic distortion. In this case, the use of a simple exponential compensation ramp instead of a linear one is the proposed solution for drawing a sinusoidal input current. Moreover, the line current is cycle-by-cycle controlled, and therefore, the input-current feedback loop is extremely fast, which allows the use of this type of control with high-frequency lines. The proposed idea is to apply this simple control to a one-stage PFC in order to design a low-cost ac-dc HB-LED driver. However, the application of this control strategy to PFC belonging to the flyback family of converters is not obvious. Designoriented considerations about its implementation in PCMIC will be provided. Finally, an experimental prototype of this driver was developed.

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Section: Appendix Design Considerations Of the Output Capacitor In Comentioning

confidence: 99%

Design-Oriented Analysis and Performance Evaluation of a Low-Cost High-Brightness LED Driver Based on Flyback Power Factor Corrector

Lamar

Arias

Rodríguez

et al. 2013

IEEE Trans. Ind. Electron.

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“…The analysis in these papers is based on the fact that decreased pulsating input power leads to decreased ripple power and capacitor volume on the DC bus, which can be achieved by controlling the input current. In [15], a similar concept was also adopted by distorting the input current to reduce the output capacitor. The essence of injecting harmonic currents or distorting the input current is to obtain a varied duty cycle to control the power switches, which changes the amount of energy delivered to the load in each fundamental cycle.…”

Section: Introductionmentioning

confidence: 99%

Control of Ripple Eliminators to Improve the Power Quality of DC Systems and Reduce the Usage of Electrolytic Capacitors

et al. 2016

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The problem of voltage/current ripples has become a primary power quality issue for dc systems, which could seriously degrade the performance on both the source side and the load side and lead to reliability concerns. In this paper, a single-phase Pulse width modulation-controlled rectifier is taken as an example to investigate how active control strategies can improve the power quality of dc systems, reduce voltage ripples, and, at the same time, reduce the usage of electrolytic capacitors. The concept of ripple eliminators recently proposed in the literature is further developed, and the ratio of capacitance reduction is quantified. With such ripple eliminators, this power quality problem is formulated as a control problem to actively divert the ripple current on the dc bus. The main focus of this paper is to investigate how advanced control strategies could improve the performance of ripple eliminators. An advanced controller on the basis of the repetitive control is proposed for one possible implementation of ripple eliminators in the continuous current mode (CCM). Experimental results are presented to verify the effectiveness of the strategy with comparison to another ripple eliminator operated in the discontinuous current mode. It has been shown that the proposed instantaneous ripple-current diversion in CCM leads to a nearly fourfold improvement of performance.INDEX TERMS Instantaneous diversion of ripple currents, CCM, DCM, ripple eliminators, voltage ripples, repetitive control, reliability, electrolytic capacitors.

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“…Although, these topologies have a low component count, they suffer from having low efficiencies (<90%) and the inability to remove the bulk capacitor needed in PFC. Nevertheless, the removal of the bulk capacitor is not always possible in a single-stage without including more active components [8]- [11] or distorting the input current [12] [13] due to the pulsating input power of the grid.…”

Section: Introductionmentioning

confidence: 99%

Single-stage AC/DC dual inductor BCM current-fed push-pull for HB-LED lighting applications

Castro

Martin

Lamar

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-A single-stage, AC/DC driver for High Brightness Light-Emitting Diodes (HB-LED) with galvanic isolation is presented in this paper. The driver is based on a Dual Inductor Current-fed Push-Pull (DICPP) converter with each inductor operating in Boundary Conduction Mode (BCM). The interleaving between the two inductors makes possible for the converter to reduce the high input current ripple of a BCM. Moreover, it is fully compliant with IEC 1000-3-2 Class C, and it is also able to achieve high Power Factor (PF). Moreover, the low component count, simplicity and overall outstanding characteristics make this topology suitable for medium power range HB-LED drivers in low cost applications.Finally, the proposed topology has been tested on a 90W prototype for the full range of the US single-phase line voltage, feeding several strings of HB-LED, with an output voltage of 48V at full load. The prototype achieves a maximum efficiency of 92% with 0.99 power factor, 8% THD at full load and guarantees good quality light.

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On the Limit of the Output Capacitor Reduction in Power-Factor Correctors by Distorting the Line Input Current

Cited by 94 publications

References 14 publications

Design-Oriented Analysis and Performance Evaluation of a Low-Cost High-Brightness LED Driver Based on Flyback Power Factor Corrector

Design-Oriented Analysis and Performance Evaluation of a Low-Cost High-Brightness LED Driver Based on Flyback Power Factor Corrector

Control of Ripple Eliminators to Improve the Power Quality of DC Systems and Reduce the Usage of Electrolytic Capacitors

Single-stage AC/DC dual inductor BCM current-fed push-pull for HB-LED lighting applications

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