Review on In-service Efficiency Estimation of Three Phase Induction Motors
Journal Title: Applied Electromagnetics - Year 2022, Vol 10, Issue 2
Abstract
The standard methods for determining the efficiency of electric motors have been divided into two distinct categories; direct and indirect methods. Usually, it is difficult to prepare all necessary facilities and requirements for measuring the efficiency of in-service electric motors. Meanwhile, some online efficiency estimation methods have been developed for three-phase induction motors that can be used in necessity. In these methods, the output power of the three-phase induction motor is estimated by measuring electrical signals of the motor including current, voltage, active power, and power factor. Three-phase induction motor's in-service efficiency estimation methods are divided into four categories including slip method, current method, equivalent circuit method, and air gap torque method. The two latter mentioned methods have enough accuracy in comparison with the standard methods. In this article, previous literature on online and in-service efficiency estimation methods of three-phase induction motors, based on the equivalent circuit method and the air gap torque method are reviewed.
Authors and Affiliations
Ali Mosallanejad, Alireza Ghaempanah
Keywords
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