| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To make it possible to supply power of stable constant voltage, even though a load-carrying capacity fluctuates, when constant-voltage, constant-frequency power is supplied from a static uninterruptible power supply to a load by way of a power distribution installation disposed away from the power supply. <P>SOLUTION: The static uninterruptible power supply 30A is so constructed that a rectifier circuit 6A and an inverter circuit 7A are connected to an alternating-current power supply 1A, and constant-voltage, constant-frequency power is supplied to a load by way of the power distribution installation 16A; and when alternating-current power supply is removed, direct-current power 8A is guided to the inverter circuit, to continue power supply to the load. The uninterruptible power supply includes a voltage detector 32A, that detects the terminal voltage on the side of a distribution board disposed away from the power supply; a correction signal generating circuit that generates a correction signal 41A, by using terminal voltage signals 36A, 37 from the voltage detector and terminal reference voltage; and a voltage control circuit 35A that adjusts the output voltage 42A of the inverter circuit, by using a constant-voltage reference voltage 43A and the correction signal and carries out control so that the terminal voltage on the distribution board 16A side becomes the desired fixed voltage. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
