Voltage and current distortion generated by the CNC

The paper presents the results of voltage and current measurements performed in electrical drive system of CNC machines. The tests were made for different operation states of devices. We analysed the influence of nonlinear devices for current and voltage waveforms. The measurement results are shown as current and voltage waveforms, and charts present harmonics and their participation in waveforms analysis. The measurements have been executed with controlled power quality analyser class A that guarantees high quality.