| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power supply device which does cause an increase of a capacity of a transformer by preventing a backflow in a primary winding of the transformer even if a load of a secondary winding is imbalanced. SOLUTION: The power supply device includes first to third grounding diodes 31 to 33 which are connected to first to third power-discharging windings 11b to 13b in series thereto, discharge power accumulated in first to third magnetic circuits 11m to 13m to a DC power supply 3 before the accumulated power is discharged from each of first to third output windings 11c to 13c when terminal voltages of first to third capacitors 51 to 53 reach prescribed values, inhibit electricity conduction when accumulating power to the first to third magnetic circuits 11m to 13m via first to third input windings 11a to 13a, finish the accumulation process of the power, generate back electromotive forces at the first to third magnetic circuits 11m to 13m, and are connected to the windings at polarity which becomes conductive when inter-terminal voltages of the first to third capacitors reach prescribed voltage values. COPYRIGHT: (C)2009,JPO&INPIT
|
