| US 7,499,291 B2 | ||
| DC power transmission system of voltage source converter using pulse-interleaving auxiliary circuit | ||
| Byung Moon Han, Seoul (Korea, Republic of) | ||
| Assigned to Myongji University Industry and Academia Cooperation Foundation, Gyeonggi-Do (Korea, Republic of) | ||
| Filed on Jan. 12, 2007, as Appl. No. 11/652,983. | ||
| Claims priority of application No. 10-2006-0063336 (KR), filed on Jul. 06, 2006. | ||
| Prior Publication US 2008/0007978 A1, Jan. 10, 2008 | ||
| Int. Cl. H02M 3/335 (2006.01); H02M 5/45 (2006.01); H02M 3/24 (2006.01) | ||
| U.S. Cl. 363—17 [363/37; 363/98] | 3 Claims |
| 1. A converter system comprising:
an IGBT converter for converting an AC power to a DC power or the DC power to the AC power;
an open Y-Y transformer and a Y-Δ transformer for stepping up or stepping down the AC power having a predetermined magnitude;
a capacitor for dividing a DC voltage; and
a DC auxiliary circuit comprising a normal transformer and a half-bridge for overlapping a pulse type input voltage to increase
the number of pulses of an output waveform,
wherein the IGBT converter comprises a first converter connected to the Y-Y transformer and a second converter connected to
the Y-Δ transformer,
the capacitor comprises a first DC capacitor connected between a primary side terminal of the transformer of the DC auxiliary
circuit and a positive terminal of the first converter, and a second DC capacitor connected between the primary side terminal
of the transformer of the DC auxiliary circuit and a negative terminal of the second converter, and
the half-bridge of the DC auxiliary circuit comprises a 3-level half-bridge consisting of first through fourth switching elements
connected to the first DC capacitor and the second DC capacitor in parallel and connected to secondary side terminals of the
transformer.
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