| 摘要 |
PURPOSE:To reduce the size of an uninterruptible power source equipment by rectifying power of a commercial power source equipment and charging a floating cell thereby making the DC/DC converter of the uninterruptible power source equipment for producing AC power of commercial frequency through an output insulating DC/DC converter bilateral. CONSTITUTION:Power of an AC power source 1 is rectified 2 and employed for charging of a floating cell 3 and a load 6 is driven with AC power having predetermined frequency produced from a PWM inverter 5 through a DC/DC converter 7. The DC/DC converter 7 comprises a regenerative diode 13 and a regenerative switch 14 connected, respectively, in parallel with a primary main switch 11 and a secondary main diode 12 through an insulating transformer 8 thus exhibiting bilateral performance. Reactive power produced at the load 6 side is regenerated through the diode 13 to the power source by closing a switch 14 and opening a switch 11 according to load conditions. By such arrangement, the PWM inverter 5 is driven optimally at all times and abnormal voltage rise is suppressed. |
