From experimental results in Table 3, the harmonic currents were high when light load condition and lower when close to full load but still high around over 50%.
The second laboratory sheet requires the experiment of VSD installed motor with passive filter as shown in Fig. 5. The voltage and current measurements also were installed to get voltage and current waveforms at 2 measurement point (point 1 and 2). Same experimental procedures were applied to get same required parameters. The example results were shown in Fig.9.