DOE Patents Database - Search Results

	Patent Title	Inventor(s)	Issue Date	Patent Number	Full Text
	A system and method for a motor management system includes a computer readable storage medium and a processing unit. The processing unit configured to determine a voltage value of a voltage input to an alternating current (AC) motor, determine a frequency value of at least one of a voltage input and a current input to the AC motor, determine a load value from the AC motor, and access a set of motor nameplate data, where the set of motor nameplate data includes a rated power, a rated speed, a rated frequency, and a rated voltage of the AC motor. The processing unit is also configured to estimate a motor speed based on the voltage value, the frequency value, the load value, and the set of nameplate data and also store the motor speed on the computer readable storage medium. System and method for motor speed estimation of an electric motor	Lu, Bin , Yan, Ting , Luebke, Charles John , Sharma, Santosh Kumar	06/19/2012	8,203,298
	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. System and method for monitoring and controlling stator winding temperature in a de-energized AC motor	Lu, Bin , Luebke, Charles John , Habetler, Thomas G. , Zhang, Pinjia , Becker, Scott K.	12/27/2011	8,084,984

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