Artículo de revista
Assessment of the energy efficiency estimation methods on induction motors considering real-time monitoring
Registro en:
0957-0233
Corporación Universidad de la Costa
REDICUC - Repositorio CUC
Autor
Sousa Santos, Vladimir
Cabello Eras, Juan Jose
Sagastume Gutierrez, Alexis
Cabello Ulloa, Mario Javier
Institución
Resumen
Different methods have been developed to estimate the energy efficiency of induction motors. The accuracy
of these methods vary with the load factor, the unbalanced voltage (UV) and harmonics. The feasibility of
these methods for efficiency estimation in real-time were theoretically and experimentally assessed during
the operation under different operational conditions (i.e. balanced sinusoidal voltage (BSV), harmonics, UV
and harmonics with UV). Results show that for load factors over 80%, the air-gap method is applicable under
any condition, while the slip method is only applicable under BSV or balanced harmonic voltage. Moreover,
for load factors over 40%, the nameplate method is applicable under BSV. Other methods result in errors
over 8% and optimization methods are not applicable for real-time monitoring. Electric systems generally
operates with some degree of UV and harmonics, while induction motors mostly operate with load factors
below 60%, limiting the use of these methods for real-time measurement.