Transient voltage and harmonic currents quashing (THQ)...

Details Transient voltage and harmonic currents quashing (THQ)... Transient voltage and harmonic currents quashing (THQ)...

2011-08-02

2011-08-02

Mai, Anh T (Department: 2832)

Inductor devices

Polyphase

C336S012000

Reexamination Certificate

active

07990242

ABSTRACT:
Different configurations of transient voltage quashing (TQ) transformers, harmonic current quashing (HQ) transformers, and transient voltage and harmonic current quashing (THQ) transformers include one or more of: a tertiary winding radially placed between the primary and secondary windings, with a surge suppressors coupled thereto, which quashes transient voltages in the transformer and any output device attached to output leads of the tertiary or secondary windings; and an arrangement of the secondary windings, separated by at least a second type intra-winding insulation, into one or a plurality of output winding groups, each used to provide power to N serially-connected output devices that exhibit known/expected output voltage characteristics. The second type intra-winding insulation has a dielectric strength to withstand the sum of the voltage output of the device being powered by the output winding and the adjacent serially-connected device, such that the output device experiences minimal harmonic currents.

REFERENCES:
patent: 4092621 (1978-05-01), Syswander et al.
patent: 5216356 (1993-06-01), Owen
patent: 7049921 (2006-05-01), Owen
patent: 2007/0024264 (2007-02-01), Lestician
patent: 2008/0037192 (2008-02-01), Huang et al.
patent: 2009/0273297 (2009-11-01), Kelly

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