Minimization of the DC current ripple of a three-phase buck-boost PWM unity power factor rectifier

Author

Baumann, Martina ; Kolar, Johann W.

Author_Institution

Dept. of Electr. Drives & Machines, Wien Univ., Vienna, Austria

Volume

2

fYear

2002

fDate

2002

Firstpage

472

Abstract

The modulation of a novel three-phase three-switch buck-type unity power factor rectifier with integrated DC/DC boost converter output stage is optimized concerning the ripple amplitude of the buck-boost inductor current. This is achieved by coordination of the switching operation of the buck input stage and of the boost output stage. A comparative evaluation of different modulation schemes does identify a modulation scheme which simultaneously does provide minimum DC current ripple and minimum input filter capacitor voltage ripple at minimum switching losses and/or maximum pulse frequency. All theoretical considerations are for operation in a wide input voltage range and are verified by simulations and by measurements on a DSP-controlled 5 k W prototype of the system

Keywords

DC-DC power convertors; PWM power convertors; digital control; digital signal processing chips; inductors; losses; rectifying circuits; switching circuits; 5 kW; DC current ripple minimisation; DSP-control; boost output stage; buck input stage; inductor current; integrated DC/DC boost converter; maximum pulse frequency; minimum input filter capacitor voltage ripple; minimum switching losses; ripple amplitude; switching operation; three-phase buck-boost PWM unity power factor rectifier; Amplitude modulation; Capacitors; Filters; Frequency; Inductors; Pulse modulation; Reactive power; Rectifiers; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the

Conference_Location

Osaka

Print_ISBN

0-7803-7156-9

Type

conf

DOI

10.1109/PCC.2002.997564

Filename

997564