| 摘要 |
The configurations of a bridgeless PFC circuit system and a controlling method thereof are provided. The proposed system includes a bridgeless PFC circuit including a first bridge arm having a first and a second terminals and a first middle point, a second bridge arm having a first and a second terminals and a second middle point, and a bidirectional switch coupled between the first middle point and the second middle point, and an inductor coupled between the first middle point and an AC power source coupled to the second middle point, and a current sensing circuit including a first current transformer sensing a first current flowing through the bidirectional switch, which having a primary side winding coupled to the bidirectional switch and a first and a second secondary side windings, and a switching device coupled to the two secondary side windings.
|
