Compensation Control of Zero Current Detection Delay and Interleave Phase Error for CRM Totem-Pole Power Factor Correction in Portable Charging
Wang Shengdong1, Li Haoran2, Gu Zhanbiao3, Zhang Zhiliang1, Ren Xiaoyong1
1. College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 211106 China; 2. School of Electrical Engineering and Automation Anhui University Hefei 230039 China; 3. The 13th Research Institute of CETC Shijiazhuang 050051 China
Abstract：Totem-pole power factor correction (PFC) is widely used in EV chargers to improve the charging efficiency. A full-range ZVS control model considering ZVS margin and light load frequency limitation is proposed in this paper, full ZVS operation is realized within full voltage range. The impact of zero-current-detection (ZCD) delay on the total harmonic distortion (THD) of input current is analyzed, and a ZCD delay compensation method based on the on-line time calculation model is proposed, the full load THD is reduced by 1.4%. For the phase error of two-phase interleaving, a phase error compensation method considering the change of switching period is proposed, which improves the interleaving accuracy and the full load THD is further reduced by 0.5%. Finally, a prototype of 3-kW portable charger is built to verify the effectiveness of the proposed control strategy. The maximum efficiency of the totem-pole PFC stage is 98.8%, and the maximum charging efficiency is 96.6%. The full load THD is 2.4%, which is 1.9% lower than that before compensation.
王生东, 李浩然, 顾占彪, 张之梁, 任小永. 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, Zhang Zhiliang, Ren Xiaoyong. Compensation Control of Zero Current Detection Delay and Interleave Phase Error for CRM Totem-Pole Power Factor Correction in Portable Charging. Transactions of China Electrotechnical Society, 2022, 37(1): 12-23.
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2022, Vol. 37 
