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System and method for determining stator winding resistance in an AC motor

Patent ·
OSTI ID:1016727
 [1];  [2];  [3];  [4]
  1. Kenosha, WI
  2. Snellville, GA
  3. Atlanta, GA
  4. West Bend, WI
+ Show Author Affiliations
A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.
Research Organization:
Eaton Corporation (Cleveland, OH)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC36-04GO14000
Assignee:
Eaton Corporation (Cleveland, OH)
Patent Number(s):
7952318
Application Number:
12/132,484
OSTI ID:
1016727
Country of Publication:
United States
Language:
English

References (3)

A remote and sensorless thermal protection scheme for small line-connected AC machines journal September 2003
An online stator winding resistance estimation technique for temperature monitoring of line-connected induction machines journal May 2003
Motor Thermal Protection by Continuous Monitoring of Winding Resistance journal August 1980

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42 ENGINEERING