| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of the difficulty in attaining ZVS both at turn-off and at turn-on of the main switch Q1 of a DC-DC converter. SOLUTION: A series circuit of a primary winding N1 and the main switch Q1 is connected with a direct-current power supply Ei . A capacitor C1 for partial resonance is connected, in parallel with the main switch Q1 . A rectifying and smoothing circuit 3 is connected with a secondary winding N2 . A series circuit of a tertiary winding N3 , a quaternary winding N4 , an inductor L1 for resonance, a first auxiliary diode Da, and an auxiliary switch Q2 is connected, in parallel with a series circuit of the primary winding N1 and the main switch Q1 . A second auxiliary diode Db is connected, in parallel with a series circuit of the quaternary winding N4 , the inductor L1 for resonance, the first auxiliary diode Da, and the auxiliary switch Q2 .
|
