System for Electrical Apparatus Testing
AssigneeSKF USA Inc.
InventorsErnesto Wiedenbrug, Sang Bin Lee
Life of this patent
Estimating the term…
Loading patent…
AssigneeSKF USA Inc.
InventorsErnesto Wiedenbrug, Sang Bin Lee
Estimating the term…
An easily implemented method of diagnosing both supply path, upstream, and load path, downstream, anomalies such as impedance events in machine or motor circuitry is accomplished by analyzing the across-the-line startup current and voltage time waveforms. No line of sight limitations exist and high accuracy exists. The techniques can be automated estimating poor contact resistance based on the voltage and current variation under a load change condition perhaps such as startup and/or shutdown of the load. Both, upstream and downstream problems from the point of voltage measurement can be monitored analyzing a load change condition. Additionally, downstream problems can be identified by using negative sequence current under steady state operation of the load.
A method of quantifying electric machine circuitry anomalies comprising the steps of:
A method of quantifying electric machine circuitry anomalies comprising the steps of:
A method of quantifying electric machine circuitry anomalies as described in claim 2 or 3 wherein said step of sensing at least one electrical effect comprises the step of sensing said at least one electrical effect at only said sense location.
A method of quantifying electric machine circuitry anomalies as described in 2 wherein said step of sensing at least one electrical effect comprises the step of load change condition sensing at least one electrical effect.
5-6. (canceled)
A method of quantifying electric machine circuitry anomalies as described in 2 wherein said step of sensing at least one electrical effect comprises the step of operationally active circuitry sensing at least one electrical effect while said machine circuitry is in an operative configuration.
8-11. (canceled)
15-20. (canceled)
22-25. (canceled)
27-29. (canceled)
A method of testing electric machine circuitry comprising the steps of:
(canceled)
40-44. (canceled)
46-48. (canceled)
A method of identifying an incipient fault electric machine circuitry anomaly comprising the steps of:
(canceled)
55-56. (canceled)
58-59. (canceled)
(canceled)
63-105. (canceled)
(canceled)
118-120. (canceled)
122-244. (canceled)
Dependencies are inferred from the claim text.