R. Naik et al., 3RD-HARMONIC MODULATED POWER ELECTRONICS INTERFACE WITH 3-PHASE UTILITY TO PROVIDE A REGULATED DC OUTPUT AND TO MINIMIZE LINE-CURRENT HARMONICS, IEEE transactions on industry applications, 31(3), 1995, pp. 598-602
A novel approach to achieve nearly sinusoidal line current rectificati
on of three-phase utility voltages is presented, The scheme incorporat
es two step-up de-de converters to modulate the de-link currents at th
e third-harmonic frequency, The modulated currents are then circulated
through the ac-side of the diode-bridge rectifier, using a zigzag aut
otransformer, Simulation results for a three-phase, 208-V (line-to-lin
e), 1-kW system are presented, Results from experimental investigation
s on a laboratory model are included, supporting the concept.