| 摘要 |
<p>Disclosed is an SLLC resonant converter for bidirectional power conversion in a DC-DC converter capable of bidirectional power conversion which boosts a low voltage to a high voltage and lowers a low voltage to a high voltage. The SLLC resonant converter of the present invention comprises: a primary side terminal connected to a primary side input terminal to apply the primary side input voltage to a first coil of a transformer in a forward operation and thereby inducing a current variation and connecting a primary side auxiliary inductor to the first coil in parallel in a backward operation to allow the current variation induced through the primary side auxiliary inductor to have an LLC resonance characteristic with a leakage inductance of the primary coil and a second coil of the transformer and a resonance capacitor connected to the second coil and thereby charging the primary side input voltage; and a secondary side terminal connected to a secondary side output voltage having a voltage level higher than that of the primary side input voltage to apply divided secondary side output voltage to each second coil of the transformer and the resonance capacitor, and a secondary side auxiliary inductor connected to the second coil of the transformer and the resonance capacitor in a backward operation to induce a current variation, and to connect the leakage inductance of the first coil and the second coil of the transformer, the resonance capacity connected to the second coil of the transformer, and the secondary side auxiliary inductor in a forward operation to allow the current variation induced in the second coil of the transformer to have the LLC resonance characteristic by the current variation of the first coil, thereby charging the secondary output voltage.</p> |
