A new harmonic reducing diode rectifier of capacitor input type for industrial high-voltage and high-power applications

This paper presents a new harmonic reducing rectifier that consists of the double sequential (or series) 3-phase-bridge diode-rectifier of capacitor-input type and an auxiliary circuit to reduce harmonics involved in the input line-currents. Since the new rectifier does not require a self-turn-off device nor a controller, it results in a compact, reliable and efficient solution to obtain uncontrolled DC-voltage from the utility without harmonic pollution. Additionally, the new rectifier is suitable for high-voltage high-power applications due to the double-sequential topology. In this paper, the unique arrangement and particular operation of the auxiliary circuit are introduced. Then, experimental results are shown to confirm the validity of the theory.