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Generally, an LLC series resonant converter (LLC SRC) is an attractive topology for applications, which require wide input variation and high conversion efficiency because of its wide gain capability and soft-switching capability. However, there is a regulation problem in which the output voltage increases as the load current decreases. In this paper, Bode plot and impedance asymptote analysis were...
A LLC resonant converter is a converter, which achieves Buck or Boost gain with Pulse Frequency Modulation, and it is a suitable topology for high power density. This LLC resonant converter has many advantages, such as wide soft-switching range, high switching frequency capability, and low voltage stress of active devices, however, it also has large RMS current and circulating current. From these...
A zero-voltage-switching (ZVS) bridgeless power factor correction (PFC) boost converter to reduce switching losses is proposed in this paper. Based on the conventional dual boost bridgeless converter, an auxiliary circuit including another main switch on the opposite side is added in the proposed converter to perform ZVS in man switches. Moreover, ZCS of auxiliary switches can also be achieved. As...
Continuous conduction mode (CCM) boost power factor corrector (PFC) is widely used for high power applications such as server power supply. PFC performs AC/DC conversion with nearly unity power factor (PF) and low current harmonic distortion. However, the electromagnetic interference filter capacitors in front of the bridge diode and input filter capacitor behind the bridge diode incur phase leading...
In general, the LLC series resonant converter (LLC SRC) is an attractive topology for the applications which require the wide input variation and high efficiency especially at light load condition. This is because of its wide gain capability with pulse-frequency modulation and zero-voltage-switching over the entire load condition. However, there is a regulation problem that the output voltage increases...
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