|
|
|
| Optimal Design of Planar Magnetic Integrated Matrix Transformer for High Frequency LLC Converter |
| Xiao Long1,2, Wu Liang1, Li Xin1, Zhao Jun1, Chen Guozhu1 |
1. College of Electrical Engineering Zhejiang University Hangzhou 310027 China;
2. School of Electronic and Electrical Engineering Minnan University of Science and Technology Quanzhou 362700 China |
|
|
|
|
Abstract Matrix transformer is widely used that the input side windings are connected in series and output side windings are connected in parallel, which can improve the efficiency and power density of LLC converter applied in low voltage and large current application as well as solving the problems of current imbalance and hot spot caused by device paralleling. However, traditional matrix transformers are mostly implemented with separate magnetic cores, causing considerably large winding loss and magnetic core loss, while also limiting further improvement of power density. Based on magnetic flux cancellation principle, a single core integrated matrix transformer is proposed to replace the traditional two separate magnetic cores, which can decrease the volume and loss of magnetic core. An optimal design method based on the proposed winding loss and magnetic core loss model is demonstrated to implement the tradeoff between the total loss and the footprint of the designed matrix transformer. At last, the correctness and effectiveness of the proposed matrix transformer optimal design method are verified by a 400W, 1.5MHz LLC converter prototype based on high frequency wide band-gap gallium nitride power semiconductor device.
|
|
Received: 25 December 2018
Published: 28 February 2020
|
|
|
|
|
|
[1] Yang Bo, Lee F C, Zhang A J, et al.LLC resonant converter for front end DC/DC conversion[C]// Seventeenth IEEE Applied Power Electronics Conference and Exposition, Dallas, Texas, USA, 2002: 1108-1112.
[2] Fang Yu, Xu Dehong, Zhang Yanjun, et al.Design of high power density LLC resonant converter with extra wide input range[C]//Applied Power Electronics Conference(APEC), Anaheim, CA, USA, 2007: 976-981.
[3] Park H P, Jung J H.Power stage and feedback loop design for LLC resonant converter in high switching frequency operation[J]. IEEE Transactions on Power Electronics, 2017, 32(10): 7770-7782.
[4] Ouyang Ziwei, Andersen M A E. Overview of planar magnetic technology-fundamental properties[J]. IEEE Transactions on Power Electron, 2014, 29(9): 4888-4900.
[5] Cui Meiting, You Xiaojie, Li Yan, et al.Planar transformer design in GaN based LLC resonant converter[C]//IEEE 2014 International Power Elec- tronics and Application Conference and Exposition(PEAC), Shanghai, China, 2014: 1353-1357.
[6] Wang Hongfang, Wang Fred.Power MOSFETs paralleling operation for high power high density converters[C]//Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting, Tampa, FL, USA, 2006, 5: 2284-2289.
[7] Fu Dianbo, Lee F C, Wang S.Investigation on transformer design of high frequency high efficiency DC-DC converters[C]//2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition(APEC), California, USA, 2010: 940-947.
[8] Yi K H, Moon G W.Novel two-phase interleaved LLC series-resonant converter using a phase of the resonant capacitor[J]. IEEE Transactions on Industrial Electronics, 2009, 56(5): 1815-1819.
[9] 赵清林, 刘会峰, 袁精, 等. 基于移相补偿的全桥LLC谐振变换器交错并联技术[J]. 电工技术学报, 2018, 33(12): 2777-2787.
Zhao Qinglin, Liu Huifeng, Yuan Jing, et al.An interleaved full-bridge LLC resonant converter with phase shift compensation[J]. Transactions of China Electrotechnical Society, 2018, 33(12): 2777-2787.
[10] 刘鑫, 郑祥杰, 侯庆会, 等. 变压器串并联LLC+ Buck级联DC-DC变换器的均流特性[J]. 浙江大学学报: 工学版, 2018, 52(4): 806-818.
Liu Xin, Zheng Xiangjie, Hou Qinghui, et al.Current-sharing characteristic of converter com- posed of LLC with series-parallel transformer and interleaved Buck[J]. Journal of Zhejiang University: Engineering Science, 2018, 52(4): 806-818.
[11] 任仁, 刘硕, 张方华. 基于氮化镓器件和矩阵变压器的高频LLC直流变压器[J]. 中国电机工程学报, 2015, 35(13): 3373-3380.
Ren Ren, Liu Shuo, Zhang Fanghua.High frequency LLC DC-DC transformers with a GaN transistor and a matrix transformer[J]. Proceedings of the CSEE, 2015, 35(13): 3373-3380.
[12] Reusch D, Lee F C.High frequency bus converter with low loss integrated matrix transformer[C]//2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition(APEC), Orlando, Florida, USA, 2012: 1392-1397.
[13] Huang Daocheng, Ji S, Lee F C.LLC resonant converter with matrix transformer[J]. IEEE Transa- ctions on Power Electronics, 2014, 29(8): 4339-4347.
[14] Fei Chao, Lee F C, Li Q.High-efficiency high- power-density LLC converter with an integrated planar matrix transformer for high-output current applications[J]. IEEE Transactions on Industrial Electronics, 2017, 64(11): 9072-9082.
[15] Ouyang Ziwei, Thomsen O C, Andersen M A E. Optimal design and tradeoff analysis of planar transformer in high-power DC-DC converters[J]. IEEE Transactions on Industrial Electronics, 2012, 59(7): 2800-2810.
[16] 任仁, 张方华, 刘硕. 基于LLC直流变压器(LLC- DCT)效率优化的死区时间与励磁电感设计[J]. 电工技术学报, 2014, 29(10): 141-146.
Ren Ren, Zhang Fanghua, Liu Shuo.Optimal design for efficiency based on the dead time and magnetizing inductance of LLC DC transformer[J]. Transactions of China Electrotechnical Society, 2014, 29(10): 141-146.
[17] Ouyang Ziwei, Ole C Thomsen, Michael AE Andersen.The analysis and comparison of leakage inductance in different winding arrangements for planar trans- former[C]//IEEE International Conference on. Power Electronics and Drive Systems(PEDS), Taipei, China, 2009: 1143-1148.
[18] Ferreira J A.Improved analytical modeling of conductive losses in magnetic components[J]. IEEE Transactions on Power Electronics, 1994, 9(1): 127-131. |
|
|
|
2020, Vol. 35 
