Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1982-09-24
1985-05-14
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 40, 363 44, 363128, 363138, H02M 7757
Patent
active
045176353
ABSTRACT:
This line-commutated converter, in one form, has a pair of D.C. terminals for connection to a D.C. system and a pair of A.C. terminals for connection to an A.C. system. The converter comprises first, second, third, and fourth branches, each comprising the combination of a thyristor and a diode connected in inverse-parallel and an inductor connected in series with this combination. The first and fourth branches with a first node located therebetween are connected in series across the D.C. terminals; and the second and third branches with a second node located therebetween are also connected in series across the D.C. terminals. The nodes are effectively connected across the A.C. terminals. Controlled gating means simultaneously triggers the first and second branches into conduction at a controlled phase angle with respect to the A.C. system voltage and simultaneously triggers the third and fourth branches into conduction 180 degrees thereafter, repeating this sequence each cycle of the A.C. system voltage.
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Michel, "Converter Using External Commutation on the D.C. Side," IEEE-Power Electronics Specialists Conference Record, Jun. 14-17, 1982, pp. 143-148.
Beck et al., "Spannungsrickter-ein neuer Unrichtertyp . . . ", etz-Archiv, Bd. 3, Dec. 1981, pp. 427-432.
Dissertation by H. P. Beck, "Fremdgefuhrter Zwischenkreisumrichter . . . ", Technischen Universitat Berlin, Berlin, 1981.
Freedman William
General Electric Company
McMahon John P.
Sterrett Jeffrey
Wong Peter S.
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