| 摘要 |
PURPOSE:To realize both the removal of a higher harmonic and the control of voltage by means of a comparatively simple method by using two three-phase inverters. CONSTITUTION:Inverters 2, 3 are completely the same three-phase inverters, have six pulses of the same width during a half cycle and generate output, an adjacent pulse interval thereof is pi/9. An output voltage waveform of the inverter 3 delays more than an output voltage waveform of the inverter 2 in phase only by pi/6. The primary sides of a three-phase transformer 4 of DELTA-Y connection and a three-phase transformer 5 of DELTA-open zigzag connection are each connected to the inverters 2, 3, and the secondary sides are connected in series and connected to load 6. |
