| 摘要 |
PURPOSE: To equalize the levels of the currents flowing to individual switching elements by connecting the output end of each bridge circuit in common to load through the primary winding of each transformer corresponding to each bridge circuit, and connecting the secondary windings of these transformers in series into loop shape. CONSTITUTION: In each bridge circuit 2a-2c, the junctions between several MOS transistor 3a and 3b are connected, as the output ends of the same-phase currents, to the terminal Ra of load R through the primary windings 4a-6a of several transformers 4-6, and also the secondary windings 4b-6b of the transformers 4-6 are provided with a circular signal line 10, with the directions of their currents the same. On the other hand, the junctions of MOS transistors 3c and 3d are connected, as output ends, to the terminal Rb of the load R through the primary windings 7a-9a of the transformers 7-9 severally, and also the secondary windings 7b-9b, of the transformers 7-9 are provided with a circular signal line 11, with the directions of their currents the same. Hereby, the levels of the currents flowing to the MOS transistors 3a-3d can be equalized. |
