| 摘要 |
PROBLEM TO BE SOLVED: To enable easily connecting a plurality of power-supply devices in series without separately preparing diodes for backflow prevention and for bypass.SOLUTION: A power-supply device includes: a rectifier circuit 7 and a smoothing circuit 8 rectifying and smoothing a voltage induced at a secondary winding 6b of a transformer 6 due to intermittent application of a voltage for a primary winding 6a of the transformer 6 to generate a DC voltage Vdc, and outputting the DC voltage Vdc to between a positive output section 8a and a negative output section 8b; a rectifier smoothing circuit 4; a positive output terminal 12 and a negative output terminal 13 to output the DC voltage Vdc to the outside; a terminal 14 for series connection; a rectifying element 10 for backflow prevention; and a rectifying element 11 for bypass. The terminal 14 for series connection is connected to the positive output section 8a, and the negative output terminal 13 is connected to the negative output section 8b. The rectifying element 10 for backflow prevention is connected between the positive output section 8a and the positive output terminal 12 with a direction toward the positive output terminal 12 being the forward direction. The rectifying element 11 for bypass is connected between the positive output section 8a and the negative output section 8b with a direction toward the positive output section 8a being the forward direction. |
