Title :
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
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;
Conference_Titel :
Telecommunication Energy Conference, 1999. INTELEC '99. The 21st International
Conference_Location :
Copenhagen
Print_ISBN :
0-7803-5624-1
DOI :
10.1109/INTLEC.1999.794129
