Journal Article10.1109/TPEL.2013.2292676
LLC Resonant Converter With Matrix Transformer
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TL;DR: In this article, a high-efficiency high power density LLC resonant converter with a matrix transformer is proposed, which can help reduce leakage inductance and the ac resistance of windings so that the flux cancellation method can then be utilized to reduce core size and loss.
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Abstract: In this paper, a high-efficiency high power density LLC resonant converter with a matrix transformer is proposed. A matrix transformer can help reduce leakage inductance and the ac resistance of windings so that the flux cancellation method can then be utilized to reduce core size and loss. Synchronous rectifier (SR) devices and output capacitors are integrated into the secondary windings to eliminate termination-related winding losses, via loss and reduce leakage inductance. A 1 MHz 390 V/12 V 1 kW LLC resonant converter prototype is built to verify the proposed structure. The efficiency can reach as high as 95.4%, and the power density of the power stage is around 830 W/in3.
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Citations
A Low Profile Stacked Transformer for High-Efficiency High-Output-Current 380 V/12 V LLC Resonant Converters
Jahangir Afsharian,Bing Gong,Ning Zhu,Dewei David Xu,Zhihua Yang +4 more
- 17 Mar 2019
TL;DR: In this paper, a low profile transformer structure for high-efficiency and high-output-current LLC resonant converters, named stacked transformer, is proposed, which can shrink the transformer footprint and significantly shorten the secondary current travelling loop at the output terminals.
2
Wide Operating Range Single-Stage Onboard Electric Vehicle Charger Using Impedance Control Network Architecture
Dheeraj Etta,Mausamjeet Khatua,Khurram K. Afridi +2 more
- 29 Oct 2023
TL;DR: Wide operating range single-stage onboard EV charger using impedance control network architecture achieves soft-switching on all high-frequency devices and achieves high efficiency.
2
A 2400 W/in3 1.8 V Bus Converter Enabling Vertical Power Delivery for Next-Generation Processors
Pranav Prakash,Ahmed Nabih,Yan Liang,Sudhir Kudva,Mostafa Mosa,C. T. Gray,Qiang Li +6 more
- 25 Feb 2024
TL;DR: Researchers design a 2-stage vertical power delivery system for next-gen GPUs, featuring a 1.8V intermediate bus voltage and a high-density LLC resonant converter with 2400 W/in^3 power density and 95% efficiency.
2
Automatic Current Sharing of Paralleled Windings for LLC Resonant Converter With Secondary-Side Resonant Inductors
Yue Liu,Hong Wu,Yunfei Wang,Guosheng Ji,Zhengke Zhang +4 more
TL;DR: Automatic current sharing of paralleled windings in LLC resonant converters is achieved by distributing resonant inductors to each secondary winding.
1
Improved Analysis and Modelling of Leakage Inductance for Planar Transformers
Ziwei Ouyang,William Gerard Hurley,Michael A. E. Andersen +2 more
- 01 Jan 2018
TL;DR: In this paper, the leakage flux is decomposed into longitudinal and transversal fluxes to analyze the high-frequency eddy current effect and the low-frequency dc effect in planar transformers.
References
LLC resonant converter for front end DC/DC conversion
Bo Yang,Fred C. Lee,A.J. Zhang,Guisong Huang +3 more
- 07 Aug 2002
TL;DR: In this article, a LLC resonant converter is proposed for front end DC/DC conversion in a distributed power system, which utilizes leakage and magnetizing inductance of a transformer.
Three-level LLC series resonant DC/DC converter
TL;DR: In this article, a three-level soft switching LLC series resonant dc/dc converter is presented, which achieves zero-voltage switching (ZVS) for each main switch without any auxiliary circuit.
320
Zero-voltage and zero-current-switching full bridge PWM converter for high power applications
Jung-Goo Cho,J.A. Sabate,Guichao Hua,Fred C. Lee +3 more
- 20 Jun 1994
TL;DR: In this paper, a zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) PWM converter is proposed to overcome the limitations of the ZVS-FB-PWM converter such as high circulating energy, loss of duty cycle, and limited ZVS load range for the lagging-leg switches.
319
Analytical Loss Model of High Voltage GaN HEMT in Cascode Configuration
TL;DR: In this article, the authors presented an accurate analytical model to calculate the power loss of a high voltage Gallium Nitride high electron mobility transistor (GaN HEMT) in cascode configuration.
276
Integrated magnetic for LLC resonant converter
Bo Yang,Rengang Chen,Fred C. Lee +2 more
- 07 Aug 2002
TL;DR: In this article, a new LLC resonant converter is proposed for front end DC/DC conversion in a distributed power system, which shows some potential benefits in this application, such as reduced number of components, flux ripple cancellation, and higher power density.
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