| 摘要 |
A power supply device includes input terminals, output terminals, a main transformer having a primary winding and secondary windings, a primary circuit connected between the input terminals and the primary winding of the main transformer, a secondary circuit connected between the secondary windings of the main transformer 5 and the output terminals, and an impedance conversion circuit. The impedance conversion circuit is provided in the primary circuit, connected in series to the primary winding of the main transformer, and has a function reducing a current flowing therein and a function cutting a DC component included in the reduced current. The impedance conversion circuit has a transformer, and a capacitor connected in series to a secondary winding of the transformer.
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