Simplifying the design of a DCM boost PFP

Simonetti, Domingos Sávio Lyrio; Vieira, J.L.F.; Sebastián, J.; Uceda, J.

doi:10.1109/ciep.1996.618527

Cited by 10 publications

(6 citation statements)

References 4 publications

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“…V bulk is about 370 V, which is approximated by calculation of Eq. (14). As shown in Figure 11(c), the output-current waveform is nearly square-wave shaped, and the frequency is approximately 40 kHz which verifies the calculated result and Figure 12.…”

Section: Simulation and Experimental Verificationssupporting

confidence: 80%

A single‐stage high power‐factor bridgeless AC‐LED driver for lighting applications

Chiu

2012

Circuit Theory & Apps

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An alternating‐current light‐emitting diode (AC‐LED) driver is implemented between the grid and lamp to eliminate the disadvantages of a directly grid‐tied AC‐LED lamp. In order to highlight the benefits of AC‐LED technology, a single‐stage converter with few components is adopted. A high power‐factor single‐stage bridgeless AC/AC converter is proposed with higher efficiency, greater power factor, less harmonics to pass IEC 61000‐3‐2 class C, and better regulation of output current. The brightness and flicker frequency issues caused by a low‐frequency sinusoidal input are surpassed by the implementation of a high‐frequency square‐wave output current. In addition, the characteristics of the proposed circuit are discussed and analyzed in order to design the AC‐LED driver. Finally, some simulation and experimental results are shown to verify this proposed scheme. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Simulation and Experimental Verificationssupporting

confidence: 80%

A single‐stage high power‐factor bridgeless AC‐LED driver for lighting applications

Chiu

2012

Circuit Theory & Apps

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“…The reason is as follows: As shown in Fig. 8, the value of f fit (α) is lower than f(α) at a low input voltage which means that the variation range of the duty cycle during a half line cycle obtained by (27) is narrower than that by (24). However, at a low input voltage, PF is high and close to 1 for CDC, so the variation range of the duty cycle can not be too wide during a half line cycle, otherwise PF will become lower.…”

Section: B the Fitting Duty Cyclementioning

confidence: 96%

“…To ensure that both PF near the highest input voltages are the same as possible before and after substituting the fitting function of (26) into (24) Substituting f fit (α) into (24), the duty cycle is expressed as …”

Section: B the Fitting Duty Cyclementioning

confidence: 99%

“…A simplified design approach and the conduction boundary for the DCM boost PFC converter were analyzed in [24] and [25]. Theoretically, an unity PF of the DCM boost PFC converter may be achieved by a variable duty cycle control (VDC) scheme [26][27][28], which can be precisely implemented by a digital and one-cycle control [29][30][31], or approximately realized by a feed-forward control [32][33][34][35][36].…”

Section: Introduction mentioning

confidence: 99%

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A Novel Control Scheme of DCM Boost PFC Converter

Yao

et al. 2015

IEEE Trans. Power Electron.

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The discontinuous current mode (DCM) boost power factor correction (PFC) converter features a zero-current turn-on for the switch, no reverse recovery in diode and constant frequency operations. However, when the duty cycle is constant in a line cycle, the input current contains rich 3 rd harmonic which has a phase difference of π with respect to the fundamental component. The harmonic results in not only a lower PF but also larger peak and RMS current values of the main power components, which lead to a higher conduction and switching turn-off loss. In this paper, a variable duty cycle control (VDC) scheme is proposed to make the input current contain only 3 rd harmonic which is in phase with fundamental component, while remaining the same PF at a certain input voltage as that of constant duty cycle control (CDC). A method of fitting the duty cycle is further proposed for simplifying the circuit implementation. The efficiency is improved as the critical inductance increases and the peak and RMS current values consequently decrease. The proposed method also achieves an output voltage ripple or the output storage capacitance reduction. The experimental results from a prototype of 120W are given to verify the effectiveness of the proposed method.Index Terms-Boost PFC, discontinuous current mode, 3 rd harmonic, efficiency.  Manuscript . His main research interests include power factor correction converters, renewable energy generation system and motor driving control.

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“…This concept is adopted in a typical Single-Stage PFC converter---Boost-Flyback Single-Stage PFC, by replacing the bulk electrolytic capacitor for energy-storage by film capacitor or ceramic capacitor with much smaller capacitance, which can be illustrated in the voltage of the bus voltage can be considered separately in the design procedure [9][10].…”

Section: Introductionmentioning

confidence: 99%

Design of Boost-Flyback Single-Stage PFC converter for LED power supply without electrolytic capacitor for energy-storage

Zhang

Yang

Xu³

et al. 2009

2009 IEEE 6th International Power Electronics and Motion Control Conference

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Light emitting diodes (LEDs) are likely to be used for general lighting applications due to their high efficiency and longer life. This paper presents the concept of applying large voltage ripple for energy storage into the Boost-Flyback Single -Stage PFC converter for the elimination of the electrical capacitor. Following proposed design procedure, the single stage PFC circuit with small energy storage capacitance can still achieve good output voltage regulation while preserving desired input power factor. The detailed theoretical analysis and design procedure of the Single-Stage PFC converter is presented. The experimental results obtained on a 60W prototype converter along with waveforms are presented.I.

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Simplifying the design of a DCM boost PFP

Cited by 10 publications

References 4 publications

A single‐stage high power‐factor bridgeless AC‐LED driver for lighting applications

A single‐stage high power‐factor bridgeless AC‐LED driver for lighting applications

A Novel Control Scheme of DCM Boost PFC Converter

Design of Boost-Flyback Single-Stage PFC converter for LED power supply without electrolytic capacitor for energy-storage

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