This paper presents an efficiency estimation method for inverter-fed induction motors using a rotor currents observer. A recursive linear combination of stator currents and previous rotor currents' values are used to calculate the currents. The deep-bar model machine parameters are estimated from a no-load motor start-up transient instantaneous impedance. During the efficiency estimation process, the algorithm requires the stator current measurement and the machine parameters. The proposed methodology was experimentally validated using an induction motor with a load ranged between 30% to 105%. The results are compared with the IEC600-34-2-2013-TS, with a deviation of 0.5% for the worst case. This performance demonstrates the application of the methodology in in-situ applications.
|Title of host publication||Proceedings - 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||6|
|State||Published - 8 Apr 2021|
|Event||2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021 - Virtual, Modena, Italy|
Duration: 8 Apr 2021 → 9 Apr 2021
|Name||Proceedings - 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021|
|Conference||2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis, WEMDCD 2021|
|Period||8/04/21 → 9/04/21|
Bibliographical noteFunding Information:
This work was supported in part by Facultad de Ingeniería en Electricidad y Computación, Escuela Superior del Litoral, Guayaquil, Ecuador and in part by Universidad Politécnica Salesiana, Sede Cuenca, Ecuador.
© 2021 IEEE.