ANALYSIS OF HARMONIC DISTORTION IN CNC TURNING CENTRES

Abstract

The objective of this paper is to explain the cause and effects of harmonic distortions due to the wide spread of CNC machines in Industries. Harmonics are of more concern today due to the extensive use of non-linear loads in the Industries that generates the harmonic problems in the power system. Harmonic Distortion can cause malfunction of sensitive electronic equipment. The primary need for the harmonic analysis and mitigation in CNC machines is to reduce the line current harmonics at partial load. The presence of harmonics in CNC machine was investigated by conducting a simulation using Fourier Transform technique in MATLAB/Simulink software. The simulation and the experimental results show a high level of harmonic distortion, at the Point of Common Coupling (PCC) in the distribution system. The reliability of harmonic analysis and mitigation in CNC machine has also been inferred. The purpose of conducting the harmonic study in CNC machines is to reduce the harmonics at partial loads and thereby reduce the harmonics in the whole supply system