|
|
|
| Optimal Design of High Frequency Boost Converter Based on GaN |
| Wang Zhongjie1, Wang Yifeng1, Chen Qing2, Chen Bo1, Wang Hao3 |
1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China;
2. State Grid Jiangsu Electric Power Co. Ltd Nanjing 211000 China;
3. Tianjin Key Laboratory of Electrical and Electronic Technology Tiangong University Tianjin 300387 China |
|
|
|
|
Abstract This paper focuses on the key issue of improving the efficiency of synchronous rectification Boost topology. As one of the three working modes, Boost converter in boundary conduction mode can achieve zero voltage turn-on or valley turn-on of the main power switch as well as zero current turn-off of the freewheeling switch, which helps to improve the efficiency of the converter. In addition, the use of synchronous rectification technology can further reduce the conduction loss of traditional freewheeling diodes. Based on the parameter design in BCM mode, this paper focuses on the dead time configuration method of the converter. This method theoretically reduces the conduction loss of the internal body diode and further improves the efficiency of the converter when the output current is large. In addition, the main loss calculation method of Boost converter is summarized. Finally, using the GaN power switching device, an experimental prototype with a rated power of 500W was built, and its peak efficiency reached 98% and the power density reached 96W/in3. The design goals of high efficiency and high power density were achieved, and the accuracy and correctness of the theoretical analysis were verified.
|
|
Received: 09 July 2020
|
|
|
|
|
|
[1] 刘佳斌, 肖曦, 梅红伟. 基于GaN-HEMT器件的双有源桥DC-DC变换器的软开关分析[J]. 电工技术学报, 2019, 34(增刊2): 534-542.
Liu Jiabin, Xiao Xi, Mei Hongwei.Soft switching analysis of dual active bridge DC-DC converters based on GaN-HEMT device[J]. Transactions of China Electrotechnical Society, 2019, 34(S2): 534-542.
[2] 徐殿国, 管乐诗, 王懿杰, 等. 超高频功率变换器研究综述[J]. 电工技术学报, 2016, 31(19): 26-36.
Xu Dianguo, Guan Leshi, Wang Yijie, et al.Research on very high frequency power converters[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(19): 26-36.
[3] Huang Xiucheng, Fred C Lee, Li Qiang, et al.High frequency high efficiency GaN based interleaved CRM bidirectional Buck/Boost converter with inverse coupled inductor[J]. IEEE Transactions on Power Electronics, 2016, 31(6): 4343-4352.
[4] Yao Kai, Zhou Xufeng, Yang Fei, et al.Optimum third current harmonic during nondead zone and its control implementation to improve PF for DCM Buck PFC converter[J]. IEEE Transactions on Power Electronics, 2017, 32(12): 9238-9248.
[5] Ye Z Z, Jovanovic M M, Irving B T.Digital implementation of a unity power factor constant frequency DCM Boost converter[C]//IEEE Applied Power Electronics Conference and Exposition, Austin, TX, USA, 2005: 818-824.
[6] Liu Zhengyang, Li Bin, Fred C Lee, et al.High efficiency high density critical mode rectifier inverter for WBG device based on-board charger[J]. IEEE Transactions on Industrial Electronics, 2017, 64(11): 9114-9123.
[7] 杨飞. 采用耦合电感的交错并联Boost PFC变换器[D]. 南京: 南京航空航天大学, 2013.
[8] 赵成冬. CRM PFC变流器控制策略优化的研究[D].杭州: 浙江大学, 2017.
[9] 王祎. CRM Boost PFC变换器开关频率变化范围的优化控制[D]. 南京: 南京理工大学, 2017.
[10] Colin W Clark, Fariborz Musavi, Wilson Eberle.Digital DCM detection and mixed conduction mode control for Boost PFC converters[J]. IEEE Transa- ctions on Power Electronics, 2014, 29(1): 347-355.
[11] Xu Xiaojun, Liu Wei, Huang A Q.Two-phase interleaved critical mode PFC Boost converter with closed loop interleaving strategy[J]. IEEE Transac- tions on Power Electronics, 2009, 24(12): 3003-3013.
[12] 谢锋, 皇金锋. 单电感双输出Buck变换器的供能模式及输出纹波电压分析[J]. 电工技术学报, 2020, 35(12): 2585-2595.
Xie Feng, Huang Jinfeng.Energy supply mode and output ripple voltage analysis of single inductor dual output Buck converter[J]. Transactions of China Electrotechnical Society, 2020, 35(12): 2585-2595.
[13] Di Han, Bulent Sarlioglu.Deadtime effect on GaN- based synchronous Boost converter and analytical model for optimal deadtime selection[J]. IEEE Transa- ctions on Power Electronics, 2016, 31(1): 601-612.
[14] Mu Mingkai, Fred C Lee.Comparison and optimi- zation of high frequency inductors for critical model GaN converter operating at 1MHz[C]//International Power Electronics and Application Conference and Exposition, Shanghai, China, 2014: 1363-1368.
[15] 刘天宁. 基于GaN器件的CRM Boost PFC变换器研究[D]. 北京: 中国矿业大学, 2019.
[16] 张宇飞. 基于开关变换器工作特征的功率磁芯损耗计算方法研究[D]. 南京: 南京邮电大学, 2019. |
|
|
|
2021, Vol. 36 
