公开(公告)号：US5621254A

公开(公告)日：1997-04-15

申请号：US534657

申请日：1995-09-27

申请人： Kaizo Takeda ,  Kano Otani ,  Hisayuki Nagase

发明人： Kaizo Takeda ,  Kano Otani ,  Hisayuki Nagase

IPC分类号： H02J9/00 ,  H02J9/06 ,  H02J7/00

CPC分类号： H02J9/061 ,  Y10T307/50 ,  Y10T307/505 ,  Y10T307/615 ,  Y10T307/647 ,  Y10T307/696 ,  Y10T307/702 ,  Y10T307/724 ,  Y10T307/729 ,  Y10T307/766 ,  Y10T307/826

摘要： A change-over switch performs switching between two different power supplies after connecting both power supplies simultaneously for a given time period. A controller controls the change-over switch to perform the switching operation around a synchronous point of the power supplies. Voltages of the power supplies are monitored to derive a difference voltage therebetween. From the difference voltage, a phase difference between the voltages of the power supplies is monitored. A plurality of low voltage detectors are provided for monitoring the difference voltage. The low voltage detectors are arranged to be operated at voltage values no more than preset values, respectively. The controller outputs a switching command to the change-over switch when time intervals between adjacent operation start time points of the low voltage detectors are all greater than preset values, respectively, and when the low voltage detectors are all operated. The controller controls the switching operation of the change-over switch while the monitored voltages of the power supplies are within a preset range.

摘要翻译： 在给定时间段内同时连接两个电源之间，转换开关执行两个不同电源之间的切换。 控制器控制切换开关以在电源的同步点周围执行切换操作。 监视电源的电压以导出它们之间的差电压。 根据差分电压，监视电源电压之间的相位差。 提供多个低电压检测器用于监视差分电压。 低电压检测器被设置为分别在不超过预设值的电压值下工作。 当低电压检测器的相邻操作开始时间点之间的时间间隔分别都大于预设值，当低电压检测器全部运行时，控制器向切换开关输出切换命令。 控制器控制转换开关的切换操作，同时电源的监视电压在预设范围内。