Armature slip analysis of induction motors with temperature and

Details Armature slip analysis of induction motors with temperature and Armature slip analysis of induction motors with temperature and

1977-12-08

1980-03-18

Hix, L. T.

Electrical transmission or interconnection systems

Miscellaneous systems

318490, 324161, H02K 1100

Patent

active

041941292

ABSTRACT:
Loading of induction motors is monitored and displayed by meters or alarms by analyzing slip of the armature derived from pulse signals indicating motor shaft speed. A special sensor sensing the motor shaft rotation also provides motor operating temperature signals accompanying shaft rotation speed signals. Corresponding circuitry compensates the load display over motor temperature variations. Also, the motor operating voltage is detected and voltage variations are processed to modify the load display for improved accuracy in the presence of voltage variations and by linearization of the slip characteristic.

REFERENCES:
patent: 2548307 (1951-04-01), Hall
patent: 2912644 (1959-11-01), Makous
patent: 3052117 (1962-09-01), Miller
patent: 3885420 (1975-05-01), Wolfinger
patent: 3987394 (1976-10-01), Hoh
patent: 4006417 (1977-02-01), Pace

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