Simple robust estimation of load torque in induction machines for application in real plants

Online robust estimation of flux and load torque in induction motors

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A novel method to determine the motor efficiency under variable speed operations and partial load conditions

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Induction Motor Efficiency Evaluation Using a New Concept of Stator Resistance

(2015) Camila P. Salomon et al.   IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT

Technical and economic considerations on induction motor oversizing

(2015) Fernando J. T. E. Ferreira et al.   Energy Efficiency

Are my motors oversized?

(2009) Edson da Costa Bortoni   ENERGY CONVERSION AND MANAGEMENT

A Nonintrusive and In-Service Motor-Efficiency Estimation Method Using Air-Gap Torque With Considerations of Condition Monitoring

(2008) Bin Lu et al.   IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS