Direct current machine monitoring system and method

Details Direct current machine monitoring system and method Direct current machine monitoring system and method

2005-08-09

2005-08-09

Nguyen, Vinh (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S076190, C324S11700H

Reexamination Certificate

active

06927597

ABSTRACT:
A direct current machine monitoring system includes a sensor configured to monitor a load current of the machine and provide a signal indicative of an alternating current component of the load current; and a computer configured for: transforming the signal to provide a time domain transformation of the alternating current component of the load current, identifying features in the time domain transformation corresponding to sparking, and assessing a condition of the direct current machine using the features. The transform may be performed using a wavelet transform. The features may be used to determine a sparking intensity and a sparking frequency in the direct current machine, which may be used to determine a sparking index for assessing the condition of the direct current machine. The sparking index may be compared to a limit value, and statistical analysis may be performed on the sparking index.

REFERENCES:
patent: 6496782 (2002-12-01), Claus et al.
patent: 6507797 (2003-01-01), Kliman et al.

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