An Extended Describing Modeling Method for the Multi-Resonant Converter with High Order Harmonic Components
Han Fuqiang1, Wang Yifeng1, Li Zhanchun2, Ji Ruilin3, Liu Ruixin1
1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China; 2. State Grid Tianjin Electric Power Corporation Chengxi District Supply Company Tianjin 300113 China; 3. State Grid Tianjin Power Costumer Service Center Tianjin 300210 China
Abstract An extended describing modeling method for multi-resonant converters with high order harmonics is proposed in this paper. Through the appropriate parameter design, the five-element LCLCL converter is able to transfer the fundamental and the third-order harmonic active power simultaneously. It results in the promoted utilization rate of the resonant current. The modeling principle and shortcomings of the traditional fundamental harmonic approximation method are analyzed in detail. By employing an equivalent impedance to substitute the non-linear output cell of the converter, the proposed extended describing method is built. Besides, the continuous and discontinuous rectifier current operating conditions are considered, and the expression of DC voltage gain is obtained. Finally, a 500W prototype is built in the laboratory. The feasibility of the proposed method is verified by theoretical calculations, simulations and experimental results. Outstanding soft-switching characteristics are achieved in the whole load range. The highest efficiency is 95.46%, and relatively high conversion efficiency is guaranteed under light load as well.
Han Fuqiang,Wang Yifeng,Li Zhanchun等. An Extended Describing Modeling Method for the Multi-Resonant Converter with High Order Harmonic Components[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5166-5175.
[1] Musavi F, Marian Craciun, Deepak Guautam, et al.An LLC resonant DC-DC converter for wide output voltage range battery charging applications[J]. IEEE Transactions on Power Electronics, 2013, 28(12): 5437-5445. [2] 王德玉, 段元超, 高鹤, 等. LCC谐振变换器电流输出特性研究与软开关实现[J]. 电工技术学报, 2018, 33(12): 2788-2800. Wang Deyu, Duan Yuanchao, Gao He, et al.Current output characteristics and implementation of soft switch based on LCC resonant converter[J]. Transactions of China Electrotechnical Society, 2018, 33(12): 2788-2800. [3] Ryu S H, Kim D H, Kim M J, et al.Adjustable frequency-duty-cycle hybrid control strategy for full-bridge series resonant converters in electric vehicle chargers[J]. IEEE Transactions on Industrial Electronics, 2014, 61(10): 5354-5362. [4] 曹靖, 许建平, 陈一鸣, 等. PWM-PFM混合控制LCC谐振变换器研究[J]. 中国电机工程学报, 2018, 38(12): 3629-3637. Cao Jing, Xu Jianping, Chen Yiming, et al.Study of PWM-PFM hybrid controlled LCC resonant con- verter[J]. Proceedings of the CSEE, 2018, 38(12): 3629-3637. [5] 孙孝峰, 申彦峰, 李午英, 等. 交错并联双向Buck/ Boost集成LLC谐振型三端口直流变换器[J]. 电工技术学报, 2016, 31(14): 165-175. Sun Xiaofeng, Shen Yanfeng, Li Wuying, et al.Interleaved bidirectional Buck/Boost and LLC integrated three-port DC-DC converter[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(14): 165-175. [6] Steigerward R L.A comparison of half-bridge resonant converter topologies[J]. IEEE Transactions on Power Electronics, 1988, 3(2): 174-182. [7] 郝瑞祥, 雷浩东, 贺涛, 等. 一种具有自动均压均流特性的组合式LLC谐振变换器[J]. 电工技术学报, 2016, 31(20): 151-160. Hao Ruixiang, Lei Haodong, He Tao, et al.A combined LLC resonant converter with voltage and current auto-balance capability[J]. Transactions of China Electrotechnical Society, 2016, 31(20): 151-160. [8] 李浩昱, 李振伟, 赵雷, 等. 宽输入LLC谐振变换器多电平控制策略[J]. 电工技术学报, 2017, 32(4): 48-57. Li Haoyu, Li Zhenwei, Zhao Lei, et al.Multi-level control strategy of wide input LLC resonant con- verter[J]. Transactions of China Electrotechnical Society, 2017, 32(4): 48-57. [9] Zong Sheng, Luo Haoze, Li Wuhua, et al.Theoretical evaluation of stability improvement brought by resonant current loop for paralleled LLC conver- ters[J]. IEEE Transactions on Industrial Electronics, 2015, 62(7): 4170-4180. [10] Wu Hongfei, Li Yuewei, Xing Yan.LLC resonant converter with semiactive variable-structure rectifier (SA-VSR) for wide output voltage range appli- cation[J]. IEEE Transactions on Power Electronics, 2016, 31(5): 3389-3394. [11] Sun Xiaofeng, Shen Yanfeng, Zhu Yune, et al.Interleaved Boost-integrated LLC resonant converter with fixed-frequency PWM control for renewable energy generation applications[J]. IEEE Transactions on Power Electronics, 2015, 30(8): 4312-4326. [12] Fang Zhijian, Cai Tao, Duan Shanxu, et al.Optimal design methodology for LLC resonant converter in battery charging applications based on time-weighted average efficiency[J]. IEEE Transactions on Power Electronics, 2015, 30(10): 5469-5483. [13] Kang Sang-Woo, Kim H Jin, Cho Bo-Hyung.Adaptive voltage controlled oscillator for improved dynamic performance in LLC resonant converter[J]. IEEE Transactions on Industry Applications, 2016, 52(2): 1652-1659. [14] 刘闯, 徐鑫哲, 刘海洋, 等. 基于电流平衡单元的输入并联输出并联型LLC谐振变换器模块[J]. 电工技术学报, 2016, 31(21): 159-167. Liu Chuang, Xu Xinzhe, Liu Haiyang, et al.Current balancing cell based IPOP LLC resonant converter modules[J]. Transactions of China Electrotechnical Society, 2016, 31(21): 159-167. [15] 徐恒山, 尹忠东, 黄永章. 考虑最大输出电压和效率的LLC谐振变流器的设计方法[J]. 电工技术学报, 2018, 33(2): 331-341. Xu Hengshan, Yin Zhongdong, Huang Yongzhang.Design method of LLC resonant converter con- sidering maximum output voltage and efficiency[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 331-341. [16] Wang Yijie, Guan Yueshi, Xu Dianguo, et al.A CLCL resonant DC-DC converter for two-stage LED driver system[J]. IEEE Transactions on Industrial Electronics, 2016, 63(5): 2883-2891. [17] Fu Dianbo, Fred C Lee, Liu Ya, et al.Novel multi- element resonant converter converters for front-end DC-DC converters[C]//IEEE Power Electronics Specialists Conference, Rhodes, Greece, 2008: 250-256. [18] 陈启超, 纪延超, 王建赜, 等. MOSFET输出电容对CLLLC谐振变换器特性影响分析[J]. 电工技术学报, 2015, 30(17): 26-35. Chen Qichao, Ji Yanchao, Wang Jianze, et al.Analysis of the influence of MOSFET output capacitance on the bidirectional CLLLC resonant converter[J]. Transactions of China Electrotechnical Society, 2015, 30(17): 26-35. [19] Wang Chengshan, Yang Liang, Wang Yifeng, et al.A 1kW CLTCL resonant DC-DC converter with restricted switching loss and broadened voltage range[J]. IEEE Transactions on Power Electronics, 2018, 33(5): 4190-4203. [20] 王议锋, 韩富强, 杨良, 等. 一种双变压器结构的多谐振型软开关直流变换器[J]. 电工技术学报, 2019, 34(4): 738-746. Wang Yifeng, Han Fuqaing, Yang Liang, et al.A dual transformer-structured multi-resonant soft- switching DC-DC converter[J]. Transactions of China Electrotechnical Society, 2019, 34(4): 738-746. [21] Guan Yueshi, Wang Yijie, Wang Wei, et al.A high-frequency CLCL converter based on leakage inductance and variable width winding planar magnetics[J]. IEEE Transactions on Industrial Electronics, 2018, 65(1): 280-290. [22] Qu Xiaohui, Wong Siu-chung, Chi K Tse.An improved LCLC current-source-output multistring LED driver with capacitive current balancing[J]. IEEE Transactions on Power Electronics, 2015, 30(10): 5783-5791. [23] 韩富强, 王议锋, 杨良, 等. 一种输出并联型CLTCL多谐振软开关直流变换器[J]. 电工技术学报, 2018, 33(20): 4780-4789. Han Fuqiang, Wang Yifeng, Yang Liang, et al.A parallel-output CLTCL multi-element resonant soft- switching DC-DC converter[J]. Transactions of China Electrotechnical Society, 2018, 33(20): 4780-4789. [24] Wu Hongfei, Jin Xiang, Hu Haibing, et al.Multiele- ment resonant converters with a notch filter on secondary side[J]. IEEE Transactions on Power Electronics, 2016, 31(6): 3999-4004.
2019, Vol. 34 
