Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-05-31
2011-05-31
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S490000, C318S606000, C318S608000
Reexamination Certificate
active
07952318
ABSTRACT:
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.
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Habetler Thomas G.
Lu Bin
Theisen Peter J.
Zhang Pinjia
Eaton Corporation
Ip Paul
Ziolkowski Patent Solutions Group, SC
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