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This article presents the implementation of a 10 kW high-quality three-phase diode rectifier, based on a conventional rectifier with an add-on cell with linefrequency commutated AC switches. As compared to other line-frequency commutated rectifiers, the proposed circuit allows compliance with the low-frequency harmonic limits defined in the technical report IEC 61000-3-4 for any power range. Additionally it is possible to control the output voltage, rejecting load and input voltage variations. The control was made with the microcontroler PIC17c756. A prototype was built and tested. The results confirm the theoretical analysis.

Implementação e controle de retificador trifásico de alta qualidade com comutação em baixa frequência