公开(公告)号：US06291987B1

公开(公告)日：2001-09-18

申请号：US09478670

申请日：2000-01-06

申请人： Jason A. Dean ,  Ajith K. Kumar ,  Kristopher L. Redinger ,  Bret D. Worden

发明人： Jason A. Dean ,  Ajith K. Kumar ,  Kristopher L. Redinger ,  Bret D. Worden

IPC分类号： G01R3134

CPC分类号： H02M7/521 ,  G01R31/42

摘要： A method and system for predicting malfunctions in a power inverter having one or more legs connected between first and second voltage buses is provided. Each leg has respective first and second controllable switches coupled in series to one another. The method allows for applying predetermined respective voltages at the first and second buses. The method further allows for selectively actuating the first and second switches between respective conductive or non-conductive states. A monitoring step allows for monitoring predetermined electrical parameters generated in the inverter in response to the applied voltages as the first and second switches are respectively actuated, and an adjusting step allows for adjusting the respective values of the monitored electrical parameters for deviations from respective estimated nominal values due to predetermined external variables to generate adjusted electrical parameters that in turn may be used to determine the performance of the power inverter, including detection of incipient failures.

摘要翻译： 提供了一种用于预测具有连接在第一和第二电压总线之间的一个或多个支路的电力逆变器中的故障的方法和系统。 每个支腿具有彼此串联耦合的相应的第一和第二可控开关。 该方法允许在第一和第二总线处施加预定的相应电压。 该方法还允许在相应的导电状态或非导通状态之间选择性地致动第一和第二开关。 监测步骤允许在第一和第二开关分别致动时响应于所施加的电压来监测在逆变器中产生的预定电参数，并且调整步骤允许调整所监视的电参数的相应值，以偏离各自估计的额定值 由于预定的外部变量导致的值产生调节的电参数，这进而可以用于确定功率逆变器的性能，包括初始故障的检测。