| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an AC-DC conversion circuit that allows suitably preventing an increase in cost due to the addition of a snubber circuit.SOLUTION: A converter 10 is a bridge-less PFC circuit including first and second main switches Sm1 and Sm2 and first and second main diodes Dm1 and Dm2. A snubber circuit is shared between the first main switch Sm1 and the second main switch Sm2 and between the first main diode Dm1 and the second main diode Dm2. The snubber circuit is composed of a snubber inductor 20 and a snubber capacitor 22. In order to share the snubber circuit, first and third diodes D1 and D3 are provided between a connection point P1 of the first main diode Dm1 and the first main switch Sm1 and the snubber circuit, and second and fourth diodes D2 and D4 are provided between a connection point P2 of the second main diode Dm2 and the second main switch Sm2 and the snubber circuit.</p> |
