System and method for detecting diode failures

摘要

A system for detecting faults in a rectifier includes an AC current generator and a rectifier. A controller is configured to determine an AC input current supplied to rectifier, generate a simulated rectified DC input current based upon the AC input current, and determine a DC output current from the rectifier. The controller is further configured to compare the simulated rectified DC input current to the DC output current and generate an alert command if a difference between the simulated rectified DC input current and the DC output current exceeds a predetermined difference threshold.

主权项

1. A system for detecting faults in a rectifier comprising:
an AC current generator for generating an AC output current; a rectifier operatively connected to receive the AC output current to define an AC input current to the rectifier and transform the AC input current into a DC output current, the rectifier including at least one diode; a first current sensor for generating first current signals indicative of the AC input current; an output current sensor for generating output current signals indicative of the DC output current; a controller configured to:
store a predetermined difference threshold;receive the first current signals from the first current sensor;determine the AC input current based upon the first current signals;generate a simulated rectified DC input current based upon the AC input current;receive the output current signals from the output current sensor;determine the DC output current based upon the output current signals;compare the simulated rectified DC input current to the DC output current; andgenerate an alert command if a difference between the simulated rectified DC input current and the DC output current exceeds the predetermined difference threshold.