| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an abnormality detection device for a generator motor capable of detecting abnormality in insulation by obtaining insulation resistance of the generator motor while the same is driving as well as regenerating power. <P>SOLUTION: An abnormality detection device for a generator motor 2 is driven with power which is supplied from a direct-current power source 4 and controlled by an inverter 3. The abnormality detection device comprises: zero phase current detection means 12 to detect zero phase current in an electric motor drive bus bar 6 of the generator motor 2; frequency detection means 15 to detect frequency of the current flowing through the electric motor drive bus bar 6; voltage detection means 14 to detect voltage of the direct-current power source 4; synchronous detection means 13 to perform synchronous detection of the zero phase current of the electric motor drive bus bar 6 by the frequency of the generator motor 2; and abnormality detection means 11 to detect abnormality by calculating insulation resistance from a leak current value, which is an output of the synchronous detection means 13, as well as the voltage of the direct-current power source 4. <P>COPYRIGHT: (C)2012,JPO&INPIT |
