Title :
LLC Resonant Converter With Adaptive Link-Voltage Variation for a High-Power-Density Adapter
Author :
Kim, Bong-Chul ; Park, Ki-Bum ; Kim, Chong-Eun ; Lee, Byoung-Hee ; Moon, Gun-Woo
Author_Institution :
Div. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
The output voltage of an adapter for a laptop computer should vary according to the load current in order to supply power to the computer. To satisfy this requirement, an LLC resonant converter with an adaptive link-voltage-variation (ALVV) scheme is proposed in this letter. The proposed ALVV scheme helps the LLC resonant converter to operate at a nearly constant resonant frequency and also allows for the optimal design of the converter. High power density and high efficiency can therefore be obtained. The proposed LLC resonant converter with the ALVV scheme is analyzed theoretically and verified experimentally.
Keywords :
laptop computers; power supplies to apparatus; resonant power convertors; LLC resonant converter; adaptive link-voltage variation; high power density; high-power-density adapter; optimal design; DC-DC power converters; Inductors; Portable computers; Power engineering computing; Power supplies; Power system harmonics; Resonance; Resonant frequency; Switching frequency; Voltage; Adaptive link-voltage variation (ALVV); LLC resonant converter; high power density; resonant-frequency operation;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2050906
