| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain redundant power supply devices capable of preventing the reduction of a synthetic output impedance even when power supply devices are connected in parallel and redundantly constituted. SOLUTION: The output voltage levels of the redundant power supply devices 61 to 63 are switched to high voltage and low voltage. The output voltage of the driven side power supply device out of the devices 61 to 63 receiving operation instructions from a redundant control means 7 is set up to the high voltage and the output voltage of the stand-by side power supply device is set up to the low voltage. Diodes 31 to 33 connected to the output terminals of the devices 61 to 63 are forward biased on the driven side and reversely biased on the stand-by side. The resistance value of the reversely biased diode 3 is sufficiently larger than the output impedance Z of the corresponding power supply device 6. Thereby the synthetic output impedance of the redundant power supply devices 61 to 63 becomes equal to the output impedance of one power supply device itself.</p> |
