Abstract
Unlike existing single stage ac/dc converters with uncontrolled intermediate bus voltage, a new single-stage ac/dc converter achieving power factor correction (PFC), intermediate bits voltage output regulation, and output voltage regulation is proposed. The converter is formed by integrating a boost PFC converter with a two-switch clamped flyback converter into a single power stage circuit. The current stress of the main power switch is reduced due to separated conduction period of the two source currents flowing through the power switch. A dual-loop current mode controller is proposed to achieve PFC, and ensure independent bus voltage and output voltage regulations. Experimental results on a 24-V/100-W hardware prototype are given to confirm the theoretical analysis and performance of the proposed converter.
| Original language | English |
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| Pages (from-to) | 218-228 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 23 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 |