| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an abnormality history management device of a power converter that is easy in specifying the cause of an abnormality and can reduce the memory capacity for storing abnormality history information. <P>SOLUTION: The abnormality history management device of the power converter comprises a power conversion part that arbitrarily changes the voltage and the frequency of power supply; an abnormality detection means that detects the abnormal state of the device of the power conversion part; and an abnormality content storing means that stores at least the time of the occurrence of the abnormality and the abnormality content. The abnormality history management device of the power converter will issue permission for the storage, only when an abnormality detection time has elapsed beyond a preset time; and only when the abnormality content is changed, and will the abnormality information be stored to the abnormality content storage means. <P>COPYRIGHT: (C)2007,JPO&INPIT |
