222. THE IMPACT OF HIGH ORDER HARMONICS OF SUPPLY VOLTAGE ON OPERATING CHARACTERISTICS OF INDUCTION MOTORS

Ivan Temelkovski; Goran Rafajlovski; Mihail Digalovski; Krste Najdenkoski

doi:10.51466/JEEIT2492222087t

Ivan Temelkovski Faculty of Electrical Engineering and Information Technologies, Ss. Cyril and Methodius University in Skopje, 18 Rugjer Bošković Str., 1000 Skopje, Republic of Macedonia
Goran Rafajlovski Faculty of Electrical Engineering and Information Technologies, Ss. Cyril and Methodius University in Skopje, 18 Rugjer Bošković Str., 1000 Skopje, Republic of Macedonia
Mihail Digalovski Faculty of Electrical Engineering and Information Technologies, Ss. Cyril and Methodius University in Skopje, 18 Rugjer Bošković Str., 1000 Skopje, Republic of Macedonia
Krste Najdenkoski Faculty of Electrical Engineering and Information Technologies, Ss. Cyril and Methodius University in Skopje, 18 Rugjer Bošković Str., 1000 Skopje, Republic of Macedonia

DOI: https://doi.org/10.51466/JEEIT2492222087t

Keywords: high order harmonics, efficiency, induction motor

Abstract

This paper considers the impact of high order harmonics on efficiency, power factor (PF), stator current, and electromagnetic torque developed by a three-phase induction cage motor. In that regard, three cases are examined in detail: the first - when the induction motor is connected to sinusoidal voltage, the second - when the induction motor is connected to voltage that contains high order harmonics (second and third order) despite the fundamental harmonic, and the third - when the induction motor is connected to voltage that contains both, i.e. fundamental and third order harmonic. Based on the simulation created in the Matlab SIMULINK programming and numeric platform, an analysis was made of each of the three cases, clearly highlighting the differences observed.
The main aim of this paper is to make a comparison and estimate the error that could be made by neglecting the presence of one of the supply voltage high order harmonics for the induction motor, as well as to highlight the importance of taking these harmonics into account in calculations for operating characteristics of induction machines.