Medium voltage PWM drive and method

Details Medium voltage PWM drive and method Medium voltage PWM drive and method

1994-03-01

1997-04-29

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 65, H02M 7515

Patent

active

056255454

ABSTRACT:
An electric drive apparatus and method for controlling medium-voltage alternating current motors wherein a multi-phase power transformer having multiple secondary windings provides multi-phase power to multiple power cells, each of which have a single-phase output and are controllable by a modulation controller. The primary and secondary windings in the power transformer may be star- or mesh-connected; the secondary windings may be shifted in phase. Because the power cells are connected in series, the maximum output voltage for each cell may be less than the maximum line-to-line voltage. The power cells can have a tri-state output which can be controlled using pulse-width modulation techniques. AC input power is converted to DC output power for each output phase. Output power modulation can be produced by interdigitating a selected number of carrier signals so that harmonic components reflected back to the input are attenuated.

REFERENCES:
patent: 4454573 (1984-06-01), Petsch et al.
patent: 4480299 (1984-10-01), Muto et al.
patent: 4491768 (1985-01-01), Slicker
patent: 4599550 (1986-07-01), Robertson, Jr. et al.
patent: 4617675 (1986-10-01), Ashikaga et al.
patent: 4674024 (1987-06-01), Paice et al.
patent: 4849871 (1989-07-01), Wallingford
patent: 4894763 (1990-01-01), Ngo
patent: 4965504 (1990-10-01), Ueda et al.
patent: 4975822 (1990-12-01), Lipman
patent: 4994950 (1991-02-01), Gritter
patent: 5008797 (1991-04-01), Patel et al.
patent: 5053690 (1991-10-01), Mutoh et al.
patent: 5070292 (1991-12-01), Goff
patent: 5079687 (1992-01-01), Sakisaka et al.
patent: 5099409 (1992-03-01), Bando et al.
patent: 5155671 (1992-10-01), Inaba et al.
patent: 5155672 (1992-10-01), Brown
patent: 5214366 (1993-05-01), Hollmann
patent: 5250890 (1993-10-01), Tanamachi et al.
Bose, Bimel K. "Power Electronics--A Technology Matter", Proceedings of the IEEE, vol. 80, No. 8, pp. 1303-1334 Aug. 1992.

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