Medium voltage power converter formed using low voltage drives

Electrical transmission or interconnection systems – Plural supply circuits or sources – Plural transformers

Reexamination Certificate

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Details

C363S065000, C336S005000, C336S180000, C336S170000

Reexamination Certificate

active

11559163

ABSTRACT:
A medium voltage power converter is provided that has an input transformer adapted to connect to a multi-phase power source, multiple low voltage drives each coupled to a respective set of secondary windings of the input transformer and operatively configured to provide a corresponding set of three-phase power outputs, and an output transformer. The output transformer has multiple input primary winding circuits each operatively coupled to the three-phase power outputs of a respective one of the drives, a plurality of output secondary winding circuits each disposed in relation to a respective input primary winding circuit, and a secondary winding connection arrangement in which each output secondary winding circuit has three secondary windings each of which is connected in series or in parallel with each other secondary winding of each other output secondary winding circuit to form a respective one of three phase-shifted outputs of the secondary winding connection arrangement.

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E. Cengelci, et al., “A New Medium-Voltage PWM Inverter Topology for Adjustable-Speed Drives”, IEEE Transactions on Industry Applications, vol. 35, No. 3, May/Jun. 1999, pp. 628-637.

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