LLC Resonant Converter Variable Mode Control

Yanming Gong ； Runxin Wang

《International Core Journal of Engineering》 7卷6期 (2021/06) Pp. 318-327

https://doi.org/10.6919/ICJE.202106_7(6).0037

摘要

LLC resonant converter to achieve wide voltage input, on the basis of the whole bridge LLC resonant converter topology, this paper proposes a variable modal control, when losing low pressure stage adopts full bridge inverter control, adopts full bridge phase shift frequency in medium voltage period, when the high pressure section adopts a half bridge inverter control, due to a half bridge and the equivalent input voltage gain of the whole bridge topology by half, therefore can achieve wide voltage input. The phase-shifting frequency conversion control in the middle voltage section can avoid the hard switching of the switch tube and improve the efficiency of the converter at this stage. This control strategy can maintain high efficiency in the full voltage input range of LLC converter.

關鍵字

LLC Resonant Converter ； Wide Voltage Input ； Variable Mode Control

參考文獻

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