基于二阶拟合模型的SiC双向LLC数字同步整流控制

doi:10.19595/j.cnki.1000-6753.tces.220973

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2984 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Conventional LLC synchronous rectifier (SR) typically senses high-frequency signals, easily affected by high dv/dt resulting in duty cycle loss and high conduction loss. The SR method with a given duty cycle cannot track load variations and causes high conduction loss in a wide load range. A two-order fitting model-based digital synchronous rectifier control is proposed for the bidirectional SiC LLC converter, which tracks load variations and switching frequency to calculate the SR on-time online. The turn-on instants between the primary and secondary switching devices are identical, while the calculated SR on-time determines the SR turn-off instants. The proposed control achieves low conduction loss and has high immunity to high switching noise without sensing high-frequency signals. When the resonant inductor and output load have 10% tolerances, the maximum tolerance for the SR on-time is only 2.73%. A prototype of a 6.6kW SiC bidirectional LLC charger was built. Compared with the conventional LLC SR control, the efficiency improvement is up to 0.36% at 6.6kW in the forward mode, and 0.29% at 3.3kW in the reverse mode.

Key words： LLC converter synchronous rectifier bidirectional SiC MOSFET fitting model

Received: 31 May 2022

PACS:

TM461

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Li Haoran
	Cui Chaohui
	Wang Shengdong
	Zhang Zhiliang
	Hu Cungang

Cite this article:

Li Haoran,Cui Chaohui,Wang Shengdong等. Two-Order Fitting Model-Based Digital Synchronous Rectifier Control for SiC Bidirectional LLC Converter[J]. Transactions of China Electrotechnical Society, 2022, 37(24): 6191-6203.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.220973 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I24/6191

[1] 汤欣喜, 邢岩, 吴红飞, 等. 兼顾稳态效率和暂态升压能力的LLC变换器[J]. 电工技术学报, 2020, 35(4): 767-774.
Tang Xinxi, Xing Yan, Wu Hongfei, et al.An improved LLC converter considering steady-state efficiency and transient Boost capability[J]. Transa- ctions of China Electrotechnical Society, 2020, 35(4): 767-774.
[2] 石林, 刘邦银, 段善旭. 一种基于Burst-PWM混合控制的LLC谐振变换器宽电压范围输出策略[J]. 电工技术学报, 2019, 34(22): 4772-4780.
Shi Lin, Liu Bangyin, Duan Shanxu.A Burst-PWM hybrid control method for wide output voltage range of LLC converter[J]. Transactions of China Electro- technical Society, 2019, 34(22): 4772-4780.
[3] 王生东, 李浩然, 顾占彪, 等. 便携式充电CRM图腾柱功率因数校正过零检测延迟与交错相位误差补偿控制[J]. 电工技术学报, 2022, 37(1): 12-23.
Wang Shengdong, Li Haoran, Gu Zhanbiao, et al.Compensation control of zero current detection delay and interleave phase error for CRM totem-pole power factor correctionin portable charging[J]. Transactions of China Electrotechnical Society, 2022, 37(1): 12-23.
[4] 丁超, 李勇, 姜利, 等. 电动汽车直流充电系统LLC谐振变换器软开关电压边界分析[J]. 电工技术学报, 2022, 37(1): 3-11.
Ding Chao, Li Yong, Jiang Li, et al.Analysis of soft switching voltage boundary of LLC resonant con- verter EV DC charging system[J]. Transactions of China Electrotechnical Society, 2022, 37(1): 3-11.
[5] Wu Xinke, Hua Guichao, Zhang Junming, et al.A new current-driven synchronous rectifier for series- parallel resonant (LLC) DC-DC converter[J]. IEEE Transactions on Industrial Electronics, 2011, 58(1): 289-297.
[6] Huang Daocheng, Fu Dianbo, Lee Fred C.High switching frequency, high efficiency CLL resonant converter with synchronous rectifier[C]//2009 IEEE Energy Conversion Congress and Exposition, San Jose, 2009: 804-809.
[7] Zhang Junming, Liao Jiawen, Wang Jianfeng, et al.A current-driving synchronous rectifier for an LLC resonant converter with voltage-doubler rectifier structure[J]. IEEE Transactions on Power Electronics, 2012, 27(4): 1894-1904.
[8] 洪良, 杜建华, 王均, 等. 非对称半桥LLC谐振变换器同步整流数字设计[J]. 电源学报, 2018, 16(4): 113-119.
Hong Liang, Du Jianhua, Wang Jun, et al.Digital design for synchronous rectification used in LLC resonant converter with asymmetrical half-bridges[J]. Journal of Power Supply, 2018, 16(4): 113-119.
[9] Cheng Lifeng, Liu Teng, Gan Hongjiang, et al. Adaptive synchronous rectification control circuit and method thereof: United States, US 7.495.934[P].2009-02-24.
[10] On semiconductor. Secondary side synchronous recti- fication driver for high efficiency SMPS topo- logies[EB/OL].[2022-05-31]. http://www.onsemi.cn/pub/Collateral/NCP4305-D.PDF
[11] Amiri Peyman, Botting Chris, Craciun Marian, et al.Analytic-adaptive LLC resonant converter syn- chronous rectifier control[J]. IEEE Transactions on Power Electronics, 2021, 36(5): 5941-5953.
[12] Feng Weiyi, Lee Fred C, Mattavelli Paolo, et al.A universal adaptive driving scheme for synchronous rectification in LLC resonant converters[J]. IEEE Transactions on Power Electronics, 2012, 27(8): 3775-3781.
[13] Fei Chao, Li Qiang, Lee Fred C.Digital imple- mentation of adaptive synchronous rectifier (SR) driving scheme for high-frequency LLC converters with microcontroller[J]. IEEE Transactions on Power Electronics, 2018, 33(6): 5351-5361.
[14] Wang Dong, Liu Yanfei.A zero-crossing noise filter for driving synchronous rectifiers of LLC resonant converter[J]. IEEE Transactions on Power Electronics, 2013, 29(4): 1953-1965.
[15] Li Haoran, Bai Lei, Zhang Zhiliang, et al.A 6.6kW SiC bidirectional on-board charger[C]//2018 IEEE Applied Power Electronics Conference and Expo- sition, San Antonio, 2018: 1171-1178.
[16] Abe Seiya, Yang Sihun, Shoyama Masahito, et al.Adaptive driving of synchronous rectifier for LLC converter without signal sensing[C]//2013 IEEE Applied Power Electronics Conference and Expo- sition, Long Beach, 2013: 2048-2051.
[17] Duan Chen, Bai Hua, Guo Wei, et al.Design of a 2.5kW 400/12V high-efficiency DC/DC converter using a novel synchronous rectification control for electric vehicles[J]. IEEE Transactions on Trans- portation Electrification, 2015, 1(1): 106-114.
[18] Wang Jing, Lu Bing.Open loop synchronous rectifier driver for LLC resonant converter[C]//2013 IEEE Applied Power Electronics Conference and Expo- sition, Long Beach, 2013: 2048-2051.
[19] Yeon Cheol-O, Kim Dong Kwan, Lee Jae-Bum, et al.Digital implementation of optimal SR ON-time control and asymmetric duty control in LLC resonant converter[C]//2015IEEE Energy Conversion Congress and Exposition Asia, Charlotte, 2015: 2031-2037.
[20] Infineon Corporation.3300W 52V LLC with 600V coolMOSTM CFD7 and XMC^TM[EB/OL].[2022-05-31].https://www.infineon.com/dgdl/InfineonEvaluationboard_EVAL_3K3W_LLC_HB_CFD7-ApplicationNotes-v01_00-EN.pdf?fileId=5546d4626cb27db2016d3a60583725dc.