| 摘要 |
PURPOSE:To reduce ripple fluctuation by providing a commutation circuit for forming a conversion part on a power source line independent of a DC/AC inverter, and providing a saturable reactor to the inverter. CONSTITUTION:An uninterruptible power supply source device for a computer is composed of a rectifier 3 for rectifying a 3-phase AC power source 1 to covert it to a DC current and to store it in a battery 2, and a converter 5 for converting the DC current of the battery 2 into an AC current to supply it to a load 4. A commutation circuit 5a of the converter 5, a DC/AC inverter 5b, a timing controller 17, an AC output voltage detector 22, and a commutation circuit 5a of an output voltage controller 23 are provided at a power source line independently of the inverter 5b, and a saturable reactor 6 for varying the inductance with the DC current value is provided in series with the load 4. Thus, the frequency of the AC output and the sharing voltage of the load 4 become constant irrespective of the magnitude of the load 4. |
