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A primary-switched line-side converter using zero voltage switching

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3 Author(s)
P. C. Kjaer ; Dept. of Power Eng., ABB Corp. Res., Vasteras, Sweden ; S. Norrga ; S. Ostlund

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

Published in:

Industry Applications Conference, 2000. Conference Record of the 2000 IEEE  (Volume:4 )

Date of Conference:

Oct 2000