| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent abnormalities from occurring in output voltages from operating power supplies, when a new power supply is added and connected, while a plurality of the power supplies operate in parallel. <P>SOLUTION: Each power supply A, B has a constant-voltage output circuit 10, an output voltage synchronizing/activating circuit 20 provided with a synchronization signal input/output terminal P2 for inputting and outputting a synchronizing signal between the other power supply when its own power supply is activated, and an output voltage controller 30 using the synchronization signal inputted and outputted from the synchronization signal input/output terminal P2 as required, and controlling to set an output voltage from the constant-voltage output circuit 10 to a predetermined value when its own power supply is activated. The output voltage synchronizing/activating circuit 20 has a synchronization signal connecting circuit 40 for detecting an output voltage from the constant-voltage output circuit 10, when its own power supply is activated, and disconnecting the synchronization signal input/output terminal P2 from the output-voltage synchronizing/activating circuit 20 when the output voltage attains a predetermined value. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
