NDLI: A PFC rectifier for telecommunications high power applications

Content Provider	IEEE Xplore Digital Library
Author	Baggio, J.E. Hey, H.L. Grundling, H.A. Pinheiro, H. Pinheiro, J.R.
Copyright Year	2002
Description	Author affiliation: Univ. Fed. de Santa Maria, Brazil (Baggio, J.E.; Hey, H.L.; Grundling, H.A.; Pinheiro, H.; Pinheiro, J.R.)
Abstract	This paper presents a new power factor corrected rectifier for telecommunications applications, where main switches support only half of the DC bus voltage at both preregulator and DC-DC converter. The power factor correction is performed by a three-level boost pre-regulator that produces a half-shared DC bus. This DC bus supplies an isolated dc-dc converter, which is composed of two half-bridge converters connected in series. The DC-DC converter is phase-shift modulated and operates with ZVS in full-load range. The main features of the DC-DC isolated converter are: (i) each switch is designed to support only half of the maximum dc voltage; (ii) the current stresses are equally distributed among the switches, allowing conduction losses reduction; (iii) the use of two high frequency transformers connected in series makes this converter appropriate for high-power applications; (iv) the voltage ratings of input capacitors of the DC-DC converter is one-quarter of the bus voltage; (v) there is no low frequency dynamics on input capacitors voltage, associate to duty-cycle variations. Experimental results for 1.5W/60V/25A, design procedures and comparisons between the use of phase-shift-modulation and pulse-width-modulation are presented.
Sponsorship	Power Electron. Soc. IEEE
Starting Page	634
Ending Page	640
File Size	461868
Page Count	7
File Format	PDF
ISBN	0780375122
DOI	10.1109/INTLEC.2002.1048723
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-29
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rectifiers DC-DC power converters Switches Switching converters Frequency conversion Capacitors Reactive power Telecommunication switching Voltage Power factor correction
Content Type	Text
Resource Type	Article

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