| 摘要 |
A multi-input direct current converter and a power factor correction (PFC) circuit. The multiple-input direct current converter comprises n diodes (D11, D12,..., D1n), a transformer (T), a switch tube (S1), a rectifier filter circuit (1), and a load (R). The transformer comprises a primary winding and a secondary winding (N2). The primary winding has N1 turns, and is divided into n windings (N11, N12,..., N1n) by drawing out (n-1) center taps (P1, P2,..., P(n-1)). The anodes of the n diodes are successively connected to n input sources (V1, V2,..., Vn), and the cathodes of the n diodes are successively connected to a first end (A) of the primary winding and the (n-1) center tap ends. A second end (B) of the primary winding is grounded by the switch tube. The secondary winding enables the energy to pass through the rectifier filter circuit and then delivers the energy to the load. As the center taps are drawn out from the primary winding, the multi-input direct current converter can be powered by using one input source or simultaneously using multiple input sources, and has a simple structure and low cost. A dual-input direct current converter is connected to the PFC circuit, thereby improving the efficiency of the PFC circuit. |
