A Practical Automatic Resonant Frequency Tracking Method Based on Instant Transformer Voltage in Unregulated LLC Converters

An unregulated LLC circuit is often used in two-stage converters for electrical isolation and fixed-ratio voltage transformation. When the resonance parameters deviate from the design, the preset switching frequency deviates from the actual resonant frequency, decreasing the efficiency. By analyzing...

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Veröffentlicht in:	IEEE transactions on power electronics 2024-05, Vol.39 (5), p.5473-5486
Hauptverfasser:	Hou, Yunchang, Shen, Zhuangzhuang, Yang, Dongjun, Liu, Zhigang
Format:	Artikel
Sprache:	eng
Schlagworte:	<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> LLC</tex-math> </inline-formula> </named-content> converters Bridge circuits DC transformer Electric potential frequency tracking Inductors operation modes Parameters Rectifiers Resonant frequencies Resonant frequency Switching Switching frequency Tracking Transformers Unity Voltage Waveforms
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