System and method for monitoring and controlling stator winding temperature in a de-energized AC motor

Patent · Tue Dec 27 00:00:00 EST 2011

OSTI ID:1034104

Lu, Bin ^[1]; Luebke, Charles John ^[2]; Habetler, Thomas G ^[3]; Zhang, Pinjia ^[4]; Becker, Scott K ^[5]

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1. Kenosha, WI
2. Sussex, WI
3. Snellville, GA
4. Atlanta, GA
5. Oak Creek, WI

A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.

• Research Organization: Eaton Corporation (Cleveland, OH)
• Sponsoring Organization: USDOE
• DOE Contract Number: FC36-04GO14000
• Assignee: Eaton Corporation (Cleveland, OH)
• Patent Number(s): 8,084,984
• Application Number: 12/341,044
• OSTI ID: 1034104
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING