Motor parameter estimation method and apparatus

Abstract

A system and method for establishing estimated values of electrical parameters of a motor. The electrical parameters may be established from motor databases, measured input electrical data, measured output data, and various estimations to account for unknown motor parameters. Compensations also may be provided for stator resistance, cable resistance, and other motor parameters. Based on the foregoing data, the system and method also may be used to estimate motor operating parameters, such as torque, efficiency, output power, output speed, and other performance criteria of the motor. The system and method also may establish energy and monetary comparison data between the motor and at least one alternative motor.

1 . A system, comprising: 
 a motor estimation module adapted to establish estimated values of a plurality of electrical parameters of an electric motor based on electrical input data; and    an energy analysis module adapted to establish energy performance indicia of the electric motor.    
   
   
       2 . The system as recited in  claim 1 , wherein the motor estimation module is operable to establish an estimated value of an operating parameter of the electric motor based on the estimated values of electrical parameters of the electric motor.  
   
   
       3 . The system as recited in  claim 2 , wherein the operating parameter is motor torque.  
   
   
       4 . The system as recited in  claim 2 , wherein the operating parameter is motor efficiency.  
   
   
       5 . The system as recited in  claim 2 , wherein the operating parameter is output power.  
   
   
       6 . The system as recited in  claim 2 , wherein the operating parameter is rotor temperature.  
   
   
       7 . The system as recited in  claim 1 , wherein the energy analysis module comprises an energy usage module adapted to establish energy usage data of the electric motor.  
   
   
       8 . The system as recited in  claim 1 , wherein the energy analysis module comprises an energy savings module adapted to establish energy savings data of an alternative electric motor versus the electric motor.  
   
   
       9 . The system as recited in  claim 1 , comprising a monetary analysis module adapted to establish monetary performance indicia of the electric motor based at least partially on the energy performance indicia.  
   
   
       10 . The system as recited in  claim 9 , wherein the monetary analysis module comprises a cost analysis module adapted to establish operational cost data of the electric motor.  
   
   
       11 . The system as recited in  claim 9 , wherein the monetary analysis module comprises a monetary savings module adapted to establish operational savings data of an alternative electric motor versus the electric motor.  
   
   
       12 . The system as recited in  claim 1 , comprising a database of customer motors and operational data of the customer motors.  
   
   
       13 . The system as recited in  claim 1 , comprising a database of alternative motors and operational data of the alternative motors.  
   
   
       14 . The system as recited in  claim 1 , comprising a database of motors and power losses of the motors.  
   
   
       15 . The system as recited in  claim 14 , wherein the power losses comprise friction and windage losses.  
   
   
       16 . One or more machine-readable media having application instructions encoded thereon, the application instructions comprising: 
 instructions adapted to establish estimated values of a plurality of electrical parameters of an electric motor based on electrical input data; and    instructions adapted to establish energy performance indicia of the electric motor.    
   
   
       17 . The one or more machine-readable media as recited in  claim 16 , wherein the application instructions comprise instructions adapted to establish energy usage data of the electric motor.  
   
   
       18 . The one or more machine-readable media as recited in  claim 16 , wherein the application instructions comprise instructions adapted to establish monetary performance indicia of the electric motor based at least partially on the energy performance indicia.  
   
   
       19 . A method, comprising: 
 providing an instrumentation system with electrical input data of an electric motor;    operating the instrumentation system to establish estimated values of a plurality of electrical parameters of the electric motor based on the electrical input data; and    engaging the instrumentation system to establish energy performance indicia of the electric motor.    
   
   
       20 . The method as recited in  claim 19 , wherein engaging comprises obtaining energy savings data of an alternative electric motor versus the electric motor.