Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1997-03-03
1998-07-14
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 3, 363 44, H02M 700, H02M 112, H02M 706
Patent
active
057814287
ABSTRACT:
In a multi-pulse converter system a three-phase transformer with tapped wye-connected primary winding and isolated delta-connected secondary winding is used to power two 6-pulse converter bridges connected in series to give 12-pulse operation. The transformer equivalent kVA rating is a fraction, typically less than 60%, of the total dc power. By adjusting the tapping on the wye-connected primary winding the converter dc output voltage is readily adjusted to provide higher or lower dc voltage than is attainable by a three-phase 6-pulse converter. By these means a reliable and versatile 12-pulse converter is obtained which, without additional hardware, gives excellent performance in the face of practical power sources which may incorporate voltage unbalance and pre-existing harmonic voltages.
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patent: 5446642 (1995-08-01), McMurray
patent: 5446643 (1995-08-01), McMurray
patent: 5455759 (1995-10-01), Paice
patent: 5515264 (1996-05-01), Stacey
Vu Bao Q.
Wong Peter S.
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