Maximum Power Factor Tracking Technique for LCC-Capacitor Charging Power Supply Through Variable DC Link Voltage
Maximum Power Factor Tracking Technique for LCC-Capacitor Charging Power Supply Through Variable DC Link Voltage
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DOI：
10.1109/tie.2023.3303628
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发表时间：
2024-07
影响因子：
7.7
通讯作者：
Mengjie Qin;Wenjie Chen;Jiaxuan Niu;Qingyuan Gao;Mowei Lu;Fan Zhang;Xu Yang;Stefan M. Goetz
中科院分区：
文献类型：
--
作者：
Mengjie Qin;Wenjie Chen;Jiaxuan Niu;Qingyuan Gao;Mowei Lu;Fan Zhang;Xu Yang;Stefan M. Goetz
本文提出了一种最大功率因数跟踪（MPFT）技术的LCC谐振变换器，作为一个电容充电电源的功能。所提出的MPFT技术是通过可变的直流母线电压，其参考值可以在真实的时间调整的最大功率因数。通过该方法，直流侧电压跟随输出电容电压，使MOSFET的关断电流最小，从而降低关断开关损耗。此外，这种技术减少了环流，这又降低了谐振回路中的瞬时无功功率。与传统的恒流（CC）充电和恒功率（CP）充电策略相比，所提出的CC充电与MPFT（CC-MPFT）和CP充电与MPFT（CP-MPFT）都表现出极大的效率提高。在轻载条件下，CC-MPFT的效率可提高26.84%。在CP-MPFT中，在轻载条件下效率可提高11.63%，在重载条件下效率可提高2.66%。
This article proposes a maximum power factor tracking (MPFT) technique for the LCC resonant converter which functions as a capacitor charging power supply. The proposed MPFT technique is achieved through variable dc-link voltage whose reference value can be adjusted in real time for the maximum power factor. By means of the proposed method, the dc-link voltage follows the output capacitor voltage to minimize the turn-off current of mosfets, thereby reducing the turn-off switching loss. Additionally, this technique reduces the circulating current, which in turn decreases the instantaneous reactive power in the resonant tank. In comparison with the conventional constant-current (CC) charging and constant-power (CP) charging strategies without MPFT, the proposed CC charging with MPFT (CC-MPFT) and CP charging with MPFT (CP-MPFT) both exhibit great efficiency improvement. In CC-MPFT, the efficiency can be improved by up to 26.84% under light load condition. In CP-MPFT, the efficiency can be increased by up to 11.63% under light load condition and 2.66% under heavy load condition.