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Single-switch 3φ PWM low harmonic rectifiers

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2 Author(s)
E. H. Ismail ; Dept. of Electr. Eng., Coll. of Technol. Studies, AL-Shaa'b, Kuwait ; R. Erickson

Existing 3φ AC-DC low-harmonic rectifiers are costly and require complex control schemes to minimize input current harmonics. Introduced here are two new classes of low cost 3φ AC-DC high power factor/low harmonic controlled rectifiers. These are derived from parent DC-DC converter topologies containing boost-type inputs and buck-type inputs. With a single active switch in addition to the diode bridge rectifier, the converters are capable of drawing a high-quality input current waveform naturally at nearly unity power factor. Thus, a simple 3φ AC-DC high power factor rectifier is obtained. Two algorithms are introduced in this paper for constructing a 3φ AC-DC high-quality rectifier. These algorithms depend on the simple switched-mode boost-type input converter and buck-type input converter modified by an input filter. For most known DC-DC converters which belong to these classes, there are corresponding 3φ AC-DC high power factor topologies, which use the same number of transistors and use six additional fast diodes. Analytical and simulation results are supplied to demonstrate the validity of the concept

Published in:

IEEE Transactions on Power Electronics  (Volume:11 ,  Issue: 2 )