Analysis and Design of Single-Stage AC/DC $LLC$ Resonant Converter

Chen, Shih‐Yu; Li, Zhu Rong; Chen, Chern‐Lin

doi:10.1109/tie.2011.2161649

Cited by 136 publications

(39 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…13 shows the current and drain-source voltage waveforms of Q 1 in full load. As shown in the figure, the switches work in ZVS mode, and from the switch drain-source voltage, the bus voltage is 375 V. For an input voltage of 220 VAC, the peak value of input voltage is 311 V; in the proposed LED driver, the bus voltage is only slightly greater than the peak input voltage, and it will not reach twice the input peak voltage exhibited by the single-stage driver in [26] and [27]. The proposed single-stage converter reduces the bus voltage effectively.…”

Section: Resultsmentioning

confidence: 99%

“…For example, when the input voltage is 220 VAC, the system bus voltage will be greater than 622 V, increasing the voltage stress of the switches and value of the bulk capacitor, which will increase the system cost and conduction losses. In [27], an optimized converter is proposed. Though the bus voltage is decreased, it is still greater than twice the input voltage; at the same time, the input current is in DCM, and the peak current value is high.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Single-Stage LED Driver Based on Interleaved Buck–Boost Circuit and LLC Resonant Converter

Wang

Guan

Huang

et al. 2015

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

A single-stage LED driver based on interleaved buck-boost circuit and LLC resonant converter is proposed. The buck-boost circuit and LLC resonant converter are integrated by sharing switches, which can decrease the system cost and improve system efficiency. The input voltage of the buck-boost circuit is half of the rectified voltage, and two buck-boost circuits are formed with the two half-bridge switches and corresponding diodes. The two buck-boost circuits work in interleaved mode and the inductor current is in discontinuous conduction mode, both helping to achieve the power factor correction. The half-bridge LLC resonant converter is adopted here, and the soft switching characteristic of the LLC resonant converter is not changed by the switch integration. The primary-side switches still work in zero voltage switching(ZVS) mode, and the secondary diodes still work in zero current switching (ZCS) mode, which both reduce the switching losses and improve the efficiency of the system. The detailed design process is described in this paper, and a 100-W LED street lighting prototype is proposed, with a PF of 0.995, a total harmonic distortion(THD) of 5.7%, and an efficiency of 91.6% at full load.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Single-Stage LED Driver Based on Interleaved Buck–Boost Circuit and LLC Resonant Converter

Wang

Guan

Huang

et al. 2015

IEEE J. Emerg. Sel. Topics Power Electron.

View full text Add to dashboard Cite

show abstract

“…Furthermore, with dc‐dc converters, it is possible to use soft switching to reduce switching loss and recovery loss, but the PFC part is energized by hard switching, which raises the problem of increased switching loss at higher carrier frequencies. To solve these problems, studies have been conducted to convert from ac to dc in one stage by redesigning the configuration of the converter . However, Refs.…”

Section: Introductionmentioning

confidence: 99%

“…However, Refs. , , , and all require a diode bridge, which substantially is a two‐stage configuration and results in a large circuit size. Moreover, conduction loss increases in these cases, which is also a problem.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Proposal of Isolated Single‐Stage AC‐DC Converter

Maekawa

Tamada

Mochikawa

et al. 2018

Electrical Engineering Japan

View full text Add to dashboard Cite

SUMMARY An isolated ac‐dc converter has been used in various applications, such as power supply and as a battery charger for electric vehicle. In conventional converters, a loss in each conversion stage can be reduced by applying a soft switching method. However, a conventional converter has many conversion stages including the rectifier stage, power factor correction, and dc/dc converter stages; thus, it is difficult to reduce the total converter loss and size. In this paper, we propose a novel isolated‐type ac‐dc converter with only one conversion stage; it can realize a zero‐voltage switching operation in all switching devices.

show abstract

A novel PFM/PWM hybrid modulated single‐stage FSBB‐LLC AC‐DC converter

Liang

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryBy integrating the four switch buck–boost (FSBB) PFC and full‐bridge LLC resonant converter, a novel single‐stage FSBB‐LLC AC‐DC converter is proposed. Meanwhile, the corresponding PFM/PWM hybrid modulation is put forward. The proposed solution employs a dual‐loop feedback control strategy based on PFM/PWM hybrid modulation to obtain the desired bus voltage and stable output voltage. The bus voltage feedback loop is mainly used to smoothly determine the boost or buck–boost mode of FSBB PFC cell for regulating the bus voltage; the output voltage feedback loop is in charge of stabilizing the output voltage by adjusting the switching frequency or phase shifting angle. Furthermore, an optimal parameter design based on power balance principle is also derived. The experimental results of an 85 ~ 300 V input, 12V/25A output prototype demonstrate that (1) low and narrow bus voltage of 240 ~ 340 V is achieved under the entire input and output condition; (2) the LLC cell operates at DCX mode over the whole load range as the input voltage exceeds 120 V; (3) the output voltage is well regulated even under the no‐load condition; (4) ZVS feature for the shared switches is still maintained; and (5) a peak efficiency of 90.9% and PF values above 0.987 are achieved.

show abstract

Analysis and Design of Single-Stage AC/DC $LLC$ Resonant Converter

Cited by 136 publications

References 14 publications

A Single-Stage LED Driver Based on Interleaved Buck–Boost Circuit and LLC Resonant Converter

A Single-Stage LED Driver Based on Interleaved Buck–Boost Circuit and LLC Resonant Converter

The Proposal of Isolated Single‐Stage AC‐DC Converter

A novel PFM/PWM hybrid modulated single‐stage FSBB‐LLC AC‐DC converter

Contact Info

Product

Resources

About