Title :
High-frequency transformer isolated 3-Φ 3-level single-stage soft-switched AC-to-DC converter
Author_Institution :
Grand Valley State Univ., Grand Rapids
Abstract :
This paper presents a new 3-phase, single-stage power factor corrected, ac-to-dc 3-level converter with high-frequency transformer isolation. This converter uses capacitive output filter so that the output full-bridge rectifier diodes turn off with zero current and the turn-off voltage spikes due to high di/dt are absent. Principle of operation and different operating modes are presented with analysis. Based on the analysis design example of a 1 kW, 48 V, 50 kHz 3-phase ac-to-dc converter is presented. PSPICE simulation results for the designed converter are presented. The results show soft-switching operation and low total harmonic distortion of this converter for a reasonably wide (10% -100%) range of load.
Keywords :
AC-DC power convertors; bridge circuits; harmonic distortion; high-frequency transformers; power factor correction; power harmonic filters; rectifying circuits; switching convertors; capacitive output filter; full-bridge rectifier diodes; high-frequency transformer isolation; power factor correction; single-stage soft-switched AC-to-DC converter; soft-switching operation; total harmonic distortion; voltage spikes; Diodes; Hafnium; Inductors; Power engineering and energy; Power factor correction; Reactive power; Rectifiers; Switches; Switching converters; Voltage; Single-stage; high frequency (HF) isolation; three-level; zero-voltageswitching (ZVS);
Conference_Titel :
Electro/Information Technology, 2007 IEEE International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-0941-9
Electronic_ISBN :
978-1-4244-0941-9
DOI :
10.1109/EIT.2007.4374488
