Fault diagnosis system for rotor winding of rotary electric mach

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

1987-12-09

1989-07-25

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324546, 324547, 324 55, 318490, 318696, 322 99, G01R 3102, H02P 800, H02K 1100

Patent

active

048517666

ABSTRACT:
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.

REFERENCES:
patent: 3783382 (1974-01-01), Reynolds
patent: 3967199 (1976-06-01), Knoop et al.
patent: 4020416 (1977-04-01), Ottos
patent: 4222005 (1980-09-01), Naito
patent: 4377784 (1983-03-01), Saito et al.
patent: 4528556 (1985-07-01), Maddox
patent: 4678998 (1987-07-01), Muramatsu
patent: 4731720 (1988-03-01), Takahashi

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