Fault diagnosis system for rotor winding of rotary electric...

Details Fault diagnosis system for rotor winding of rotary electric... Fault diagnosis system for rotor winding of rotary electric...

G - Physics

01

R

324/17

G01R 31/34 (2006.01) G01R 31/06 (2006.01)

Patent

CA 1269704

ABSTRACT OF THE DISCLOSURE A fault diagnosis system for a rotor winding of rotary electric machines is disclosed, in which the rotor winding of rotary field type is excited in DC fashion by an excitation circuit, on which an AC voltage is superposed, the impedance of the rotor winding is calculated from the current and voltage of the AC portion flowing in the rotor winding, and the resulting impedance is compared with a reference impedance thereby to decide a fault, if any, of the rotor winding, thus making possible accurate diagnosis of a rotary electric machine even while it is running.

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