| US 7,532,490 B2 | ||
| Converter topology and methods for interfacing an electrical machine to electrical power grid | ||
| Rajib Datta, Niskayuna, N.Y. (US); Haiqing Weng, Shanghai (China); Richard S. Zhang, Rexford, N.Y. (US); Ravisekhar Raju, Clifton Park, N.Y. (US); and Allen M. Ritter, Roanoke, Va. (US) | ||
| Assigned to General Electric Company, Niskayuna, N.Y. (US) | ||
| Filed on Aug. 14, 2006, as Appl. No. 11/464,241. | ||
| Prior Publication US 2008/0037190 A1, Feb. 14, 2008 | ||
| Int. Cl. H02J 3/00 (2006.01); H02M 5/40 (2006.01) | ||
| U.S. Cl. 363—34 [307/151; 363/71] | 17 Claims |
| 1. A power converter for coupling an electrical machine to an electrical grid, the power converter comprising:
a machine side converter and a grid side converter, each side comprising a plurality of stages for together converting a three-phase
electrical signal of the electrical machine to a three-phase electrical signal of the electrical grid;
wherein the machine side converter comprises a plurality of single-phase bridges coupled in a series and is configured for
coupling with the electrical machine;
wherein the grid side converter comprises a plurality of three-phase bridges, each three-phase bridge corresponding to one
of the single-phase bridges of the machine side converter;
wherein each three-phase bridge is coupled to the primary windings of a transformer while the secondary windings of the transformer
are phase-shifted from the primary windings thereof and are coupled to secondary windings of another transformer, thus providing
for coupling of the plurality of three-phase bridges in a series, wherein a transformer at the end of the series is configured
for coupling to the electrical grid; and
wherein each single-phase bridge of the machine side converter is coupled to the corresponding three-phase bridge of the grid
side converter by a direct current (DC) link.
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