In both PFC schemes, there is a storage capacitor between PFC and DC-DC stages. All of the input energy in two-stage ones, and all or some of the input energy in single-stage …
To achieve high-power density in power supplies, it is desirable to minimize the physical size of the energy storage capacitor. The capacitance is determined by the energy storage requirement for line outage ride-through and also the ripple current handling capability of the capacitor. Interleaving is well known as an effective method to …
In this paper, a series-capacitor-based interleaving buck power factor correction (PFC) converter is proposed, the intermediate energy storage capacitance of which is operated at discontinuous capacitor voltage mode (DCVM), and automatic power factor (PF) correction for this converter is obtained. Moreover, the voltage across the series capacitor of the …
By compensating the phase-lead effect caused by input capacitor current, the proposed feed-forward control duty improves the displacement factor as well as the distortion factor, and so the flyback …
The battery voltage depends upon the system power level. Lower power single phase systems commonly use 48-V battery, while higher power three phase systems use 400-V battery. Intermediate battery voltages are used infrequently. Systems with higher power range of string inverters could use 800-V battery for storage.
energies Article Design and Implementation of a Control Method for GaN-Based Totem-Pole Boost-Type PFC Rectifier in Energy Storage Systems Nguyen-Nghia Do 1,*, Bing-Siang Huang 1, Nhat-Truong Phan 1, Tan-Tung Nguyen 1, Jian-Hong Wu 1, Yu-Chen Liu 2 and Huang-Jen Chiu 1 ...
Abstract: In this paper, a series-capacitor-based interleaving buck power factor correction (PFC) converter is proposed, the intermediate energy storage capacitance of which is …
Abstract— Single-phase ac to dc converters for computers and related applications have requirements that are difficult to meet while achieving both high power density and high …
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 …
Single-phase AC/DC converters typically require a bulky passive energy storage device to handle the double line frequency power ripple, affecting power density and lifetime. Among the active ripple energy storage solutions, the bidirectional buck topology is popular for its low component count and voltage stress, as well as good performance. …
In this paper, a novel single-phase transformer-less, capacitor-less PFC rectifier is proposed. The proposed topology shares a common ground with the grid and the load. Thus, the reduced common ...
In this paper, a new single-stage single-switch, flyback-forward based and isolated power factor correction (PFC) converter is proposed. The proposed converter provides high power factor (PF), low current stress, high efficiency, low cost, and tight output voltage regulation. Flyback and forward converters operate in discontinuous current mode ...
accepted October 5, 2020, date of publication October 12, 2020, date of current version October 30, 2020. Digital Object ... for Minimizing Energy Storage Capacitors in Cascaded Boost -Buck PFC ...
Single-phase converters are commonly used in small and medium power supply systems, but their inherent 2ω-ripple power has a significant impact on system performance, including maximum power point fluctuations in photovoltaic systems, low-frequency light flicker in light-emitting diode lighting systems, and the efficiency and …
stallation of a PFC capacitor. The rectifier current, sho wn in Fig. 1(e), is the same as I s, and contains dominant low order harmonics (such as 5th, 7th, 9th, 11th and 13th, etc.), which ...
Interleaving PFC pre-regulator stages has the added benefit of reducing the output capacitor RMS current. Fig. 5 shows the normalized output capacitor RMS current in a …
Power Factor (PF) – usually given as a number between 0 and 1 – describes the ratio of real (or useful) power, given in Watts (W), to apparent power, given in Volt * Amps (VA). Apparent power is the vector sum of both real and reactive power, so PF is another way of expressing the percentage of useful power. Reactive power, also specified …
The first stage is an AC-DC power factor correction (PFC) rectifier followed by an energy-storage capacitor to filter the double-the-line 100/120 Hz frequency component. The …
The output capacitor is the main energy storage element in a boost power factor correction (PFC) circuit (Figure 3); it is also one of the larger and more expensive …
The other output is connected directly to a dc storage capacitor cascaded with a downstream DCM PWM converter driving the same LED load to achieve constant output current (COC) driving.
Section snippets Main circuit Fig. 1 shows the topology of single-stage isolated electrolytic capacitor-less LED driver. The input bridge rectifier circuit is composed of Dr 1-Dr 4.Boost PFC unit is composed of switch Q 1, inductor L 1, energy storage capacitor C 1, diode D 1, D 2 which realizes the power factor correction function. ...
In this paper, a family of a novel single-phase three-level PFC based on a switch-capacitor cell is proposed. The proposed PFC topologies have the characteristics of high power factor, low voltage stresses, and low power losses. Firstly, the derivation process of the novel PFC topologies is introduced in detail. Based on a representative circuit of …
In the present scenario of the fossil fuel crisis, a shift from conventional transportation to electric vehicles (EVs) is the goal, and it is necessary to make it economically feasible. Developing an efficient charger with mid-range power level may successfully resolve this problem. In this direction, an EV charging infrastructure has …
Index Terms—PFC, rectifier, grid current, harmonics, DC-link, capacitor, pulsating power, 3-phase, distortion I. INTRODUCTION Due to the limited internal energy storage capability of a PFC rectifier, e.g., because of limited DC-link capacitance, grid current
The capacitance is determined by the energy storage requirement for line outage ride-through and also the ripple current handling capability of the capacitor. …
Therefore, to achieve high power quality on PFC converters, a method to compensate for the input capacitor current is essential []. To increase the power quality in single-stage PFC flyback converters, a new feed-forward controller for single-stage flyback PFC converters is presented.
Traditionally, the ideal operation of the converter (in terms. of in put current- ripple) is for D= 0.5. Nevertheless, if the. operation range of the converter is between D= 0.6 and D=0.7, then ...
DOI: 10.1109/PCC.2002.998148 Corpus ID: 110958058 Evaluation of output filter capacitor current ripples in single phase PFC converters @article{Xu2002EvaluationOO, title={Evaluation of output filter capacitor current ripples in single phase PFC converters}, author={Dehong Xu and Jindong Zhang and Weiyun Chen and Jin-Yuan Lin and F. Lee}, …
In this paper, a new single-stage single-switch, flyback-forward based and isolated power factor correction (PFC) converter is proposed. The proposed converter provides high power factor (PF), low current stress, high efficiency, low cost, and tight output voltage regulation. Flyback and forward converters operate in discontinuous …
A coordinated two-stage operation and control strategy is proposed to significantly minimize the capacitor requirement without any other hardware changes and a new coordinated control strategy and a fluctuation-ratio based design consideration are developed to coordinate the operation of the two stages. Cascaded boost-buck PFC (CBBPFC) …
The transfer capacitor C 1 transfers energy to storage capacitor C 2 and inductance L 2, resulting in the current in inductance L 2 increases linearly. (2) Operating mode 2, time interval [t 1 –t 2]: When Q 1 is turned off …
from publication: Capacitor Ripple Current in an Interleaved PFC Converter | To achieve high-power density in power supplies, it is desirable to minimize the physical size of the energy storage ...
In this paper, a series-capacitor-based interleaving buck power factor correction (PFC) converter is proposed, the intermediate energy storage capacitance of which is operated at discontinuous capacitor voltage mode (DCVM), and automatic power factor (PF) correction for this converter is obtained. Moreover, the voltage across the series capacitor of the …
The energy storage capability and the impedance analysis by using the developed mathematical model are presented to verify the performance of the active capacitors with the proposed RCC method.
For the cascade connected single-stage PFC rectifiers, the energy storage capacitor is found in either series or parallel path of energy flow. The second group appears to represent the main stream.
Nowadays, the energy storage systems based on lithium-ion batteries, fuel cells (FCs) and super capacitors (SCs) are playing a key role in several applications such as power generation, electric vehicles, computers, house-hold, wireless charging and industrial drives systems. Moreover, lithium-ion batteries and FCs are superior in terms of …
Calculated duty cycle (top) for a two-phase interleaved PFC with constant load and L = 80 µH resulting in operation in DCM and CCM, and inductor current waveforms in DCM (bottom).
This letter presents an enhanced hybrid switched-capacitor-based buck power factor correction (HSC-BPFC) rectifier suited for high-efficiency applications. The suggested pulsewidth modulation strategy results in a five-level voltage waveform at its input ac terminals. Therefore, a lower volt-second on the input inductor results in a smaller …
Theoretical analysis and predictions of the system have been validated using MATLAB/Simulink simulation, and experimentally validated with a prototype of 7 W. The results evident that PFC integrated BDC provide …