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1. 发明申请

WO1998026488A2 STANDBY POWER SYSTEM 审中-公开
标题翻译：备用电源系统
公开(公告)号：WO1998026488A2
公开(公告)日：1998-06-18
申请号：PCT/US1997021977
申请日：1997-11-24
申请人： GENERAL SIGNAL CORPORATION
发明人： GENERAL SIGNAL CORPORATION , STICH, Frederick, A. , JUNGWIRTH, Peter, W. , ZAHRTE, Donald, K., Sr.
IPC分类号： H02J00/00
CPC分类号： H02J9/062 , H02M2001/007 , Y10T307/615 , Y10T307/625
摘要： A standby power system is provided having power conversion, output voltage control, and line-fault detection systems that make possible a significant reduction in the cost of the system. The standby power system provides backup power to a load, such as a computer system, when main AC line power fails. A system DC battery voltage is converted to an AC output voltage signal at line voltage levels by a power conversion system including a high frequency push-pull inverter, a light-weight low-cost high frequency transformer, a rectifier, and a line frequency inverter. The high frequency inverter is controlled to provide high frequency battery voltage pulse bursts separated by low frequency zero voltage dead times which are boosted by the transformer to line voltage levels and rectified by the rectifier. The line frequency inverter is controlled to provide the rectified line voltage level pulse bursts to the standby power system output in the form of a stepped square wave output signal at line frequencies. Rms and peak output voltage control is provided by a system controller based on a single digital output voltage control signal. The system controller detects the occurrence of AC line faults using a single digital line sense signal. Since analog-to-digital conversion of the power system input and output voltage waveforms is not required for line fault detection or output voltage control, the system controller may be implemented using a low-cost microprocessor.
摘要翻译：提供具有功率转换，输出电压控制和线路故障检测系统的备用电力系统，其使得可以显着降低系统的成本。当主交流线路电源出现故障时，备用电源系统为负载（如计算机系统）提供备用电源。系统DC电池电压通过包括高频推挽逆变器，轻量级低成本高频变压器，整流器和线路频率变换器的电力转换系统转换成线路电压电平的交流输出电压信号。控制高频变频器提供高频电池电压脉冲串，由低频零电压死区分开，由变压器升压到线路电压电平并由整流器整流。对线路变频器进行控制，以线路频率的阶梯式方波输出信号的形式向待机电力系统输出提供整流线路电压电平脉冲脉冲串。 Rms和峰值输出电压控制由系统控制器基于单个数字输出电压控制信号提供。系统控制器使用单个数字线路感测信号来检测交流线路故障的发生。由于电力系统输入和输出电压波形的模数转换不需要线路故障检测或输出电压控制，所以系统控制器可以使用低成本的微处理器来实现。

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