Title :
A primary-switched line-side converter using zero voltage switching
Author :
Kjær, Philip C. ; Norrga, Staffan ; Östlund, Stefan
Author_Institution :
Dept. of Power Eng., ABB Corp. Res., Vasteras, Sweden
Abstract :
A new primary-switched AC/DC converter and its modulation are presented. It employs a single- or three-phase transformer, with a matrix converter (primary) and a conventional two-level converter (secondary). This allows galvanic isolation at medium frequency, zero-voltage primary commutation and five line-side voltage levels. Two distinct modulation methods are explained in detail, and it is shown how a combination of these allows optimal operation in terms of efficiency and voltage harmonics. Measured waveforms on a 30 kW prototype confirm the expected performance
Keywords :
AC-DC power convertors; commutation; power conversion harmonics; power transformers; switching circuits; 30 kW; AC/DC converter; efficiency; galvanic isolation; line-side voltage levels; matrix converter; medium frequency; modulation; optimal operation; primary-switched line-side converter; single-phase transformer; three-phase transformer; two-level converter; voltage harmonics; waveforms measurement; zero voltage switching; zero-voltage primary commutation; Circuits; Commutation; Frequency conversion; Galvanizing; Matrix converters; Propulsion; Rail transportation; Switching converters; Thyristors; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.883154
