A switched-mode three-phase three-level telecommunications rectifier

Author

Gules, Roger ; Martins, Alexandre S. ; Barbi, Ivo

Author_Institution

Dept. of Electr. Eng., Fed. Univ. of Santa Caterina, Florianopolis, Brazil

fYear

1999

fDate

36312

Abstract

This paper presents a high power factor three-phase three-level 6 kW rectifier. The rectifier is composed of two stages connected in series: a three-switch three-level pulse-width modulated (PWM) preregulator and a neutral-point-clamped zero-voltage-switching PWM DC-DC converter (NPC-ZVS-PWM). The structures chosen for both stages have a common capacitive center point that allows the three-level operation and a low blocking-voltage stress on all the power switches (half of DC-link voltage). The reduction of blocking voltage allows the use of low cost and low loss power devices, increasing the efficiency and the power density with reduced production cost

Keywords

DC-DC power convertors; PWM power convertors; power factor; rectifying circuits; switched mode power supplies; telecommunication power supplies; 6 kW; DC-link voltage; PWM preregulator; ZVS; common capacitive center point; efficiency increase; high power factor; low blocking-voltage stress; low cost power devices; low loss power devices; neutral-point-clamped zero-voltage-switching PWM DC-DC converter; power density; pulse-width modulated preregulator; reduced production cost; switched-mode three-phase three-level rectifier; telecommunications rectifier; three-level operation; Costs; DC-DC power converters; Production; Pulse width modulation; Pulse width modulation converters; Reactive power; Rectifiers; Stress; Telecommunication switching; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunication Energy Conference, 1999. INTELEC '99. The 21st International

Conference_Location

Copenhagen

Print_ISBN

0-7803-5624-1

Type

conf

DOI

10.1109/INTLEC.1999.794129

Filename

794129