| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To constitute an uninterruptible power source system which can switch a circuit by no shutdown so as to supply a power from an inverter power supply circuit to an important load which is not allowed for shutdown when a power interruption compensated inverter power supply circuit is overloaded. <P>SOLUTION: The uninterruptible power source system includes an inverter power supply circuit, a bypass power supply circuit, and a direct power supply circuit. A load is partitioned to an important load and a normal load, the important load is connected to the inverter power supply circuit side, and the normal load is connected to the direct power supply circuit side. When an overload is generated in the inverter power supply circuit, the circuit to be power supplied is transferred to the bypass power supply circuit, the direct power supply circuit is set to a parallel connecting state to the bypass power supply circuit, a connection or disconnection switch is opened to switch the normal load from the direct power supply circuit to a power supply, current of the bypass power supply circuit supplied to the important load is set to an overload level or less of the inverter power supply circuit, and the important load is switched to the power supply from the inverter power supply circuit. <P>COPYRIGHT: (C)2004,JPO</p> |
