Early detection of metallized film capacitor failure
AssigneeInternational Business Machines Corporation
InventorsJoseph Prisco, Brian Charles Tucker, Marc Henri Coq, Enver Candan
Life of this patent
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Abstract
Embodiments of present invention provide a method of preventing high-voltage system failure. The method includes placing a metallized film capacitor (MFC) in an active operation mode in a high-voltage system; detecting one or more partial discharge (PD) events in the MFC; counting the one or more PD events; and in response to a total number of the PD events reaching a pre-determined threshold, replacing the MFC in the high-voltage system before the MFC fails. A high-voltage system with a metallized film capacitor is also provided.
Claims20
A method of preventing a high-voltage system failure, the method comprising:
- placing a metallized film capacitor (MFC) in an active operation mode in a high-voltage system;
- detecting one or more partial discharge (PD) events in the MFC;
- counting the one or more PD events;
- and
- in response to a total number of the one or more PD events reaching a pre-determined threshold, replacing the MFC in the high-voltage system before the MFC fails.
A high-voltage system comprising:
- an AC main circuit;
- a metallized film capacitor (MFC) connected to the AC main circuit via a common-mode filter;
- and
- a test circuit electrically coupled to the MFC,
- wherein the test circuit is adapted to receive an electric signal from the MFC;
- detect and count partial discharge (PD) events happening in the MFC;
- and raise an alarm in response to a total number of the PD events reaching a pre-determined threshold.
A method of preventing high-voltage system failure, the method comprising:
- placing a metallized film capacitor (MFC) in an active operation mode in a high-voltage system;
- receiving an electric signal associated with the MFC;
- detecting one or more partial discharge (PD) events in the MFC by analyzing the electric signal;
- counting the one or more PD events;
- and
- in response to a total number of the one or more PD events reaching a pre-determined threshold, recommending the MFC in the high-voltage system being replaced.
Dependencies are inferred from the claim text.