公开(公告)号：US4673825A

公开(公告)日：1987-06-16

申请号：US702313

申请日：1985-02-15

申请人： William J. Raddi ,  Robert W. Johnson, Jr. ,  John G. Tracy ,  Blazej W. Sonnenberg

发明人： William J. Raddi ,  Robert W. Johnson, Jr. ,  John G. Tracy ,  Blazej W. Sonnenberg

IPC分类号： G05F1/12 ,  H02J9/06

CPC分类号： H02J9/062 ,  Y10T307/625 ,  Y10T307/735

摘要： An uninterruptible power supply including a transformer having a first input winding normally coupling an inverter AC source with a critical AC load, which transformer also includes a second input winding operable to supply power from a bypass source to the load in the event of malfunction of the inverter circuit. The inverter is of the four-quadrant pulse-width-modulated type, thereby to permit recharging of the battery which serves as the DC source to the inverter. An inductance is provided for varying the phase relationship between a utility voltage source and the inverter voltage to produce minimum real inverter current and the "break-even" operating conduction, and a step-up device is provided for increasing the utility voltage to further minimize the break-even inverter current required during normal operation, and to maximize the through-put efficiency.

摘要翻译： 一种不间断电源，包括具有通常将逆变器AC源与临界AC负载耦合的第一输入绕组的变压器，该变压器还包括第二输入绕组，其可操作以在发生故障的情况下从旁路源向负载供电 逆变电路。 逆变器是四象限的脉冲宽度调制型，从而允许将作为直流电源的电池充电到逆变器。 提供电感以改变公用电压源和逆变器电压之间的相位关系，以产生最小的实际逆变器电流和“平衡”操作导通，并且提供升压装置以增加电力电压以进一步最小化 在正常运行期间需要的稳定的逆变器电流，并最大限度地提高吞吐效率。