| 摘要 |
<p> Provided are a converter and a bidirectional converter in which switching losses are reduced. In this converter and bidirectional converter, when the percentage of time that both switching elements forming a set in a first or second circuit (1, 2, 22) are on is low, after one switching element (S4 or S5) among the conducting set of switching elements (S1 and S4 or S5 and S8) of the second or first circuit (2, 22, 1) has been switched off in advance, the switching element (S5, S4) of the second or first circuit (2, 22, 1) is allowed to conduct in the forward direction and then switched off while an excitation current from a transistor (11) flows in a primary or secondary side circulation path, and zero-voltage switching of the switching elements (S2 and S1 or S8 and S7) that are subsequently switched off is implemented by the flow of current through the primary or secondary side circulation path, the current being larger than the excitation current as a result of being superimposed with the influence of the resonance effect from a secondary or primary side capacitor and an inductance means.</p> |
