Electric power conversion systems – Current conversion – With interphase transformer
Patent
1997-08-14
1998-12-22
Riley, Shawn
Electric power conversion systems
Current conversion
With interphase transformer
363 71, 363 43, H02M 700
Patent
active
058525530
ABSTRACT:
Sets of phase shifting interphase transformers are used to combine the outputs of six-pulse static inverter stages to generate harmonic neutralized outputs with higher pulse counts. The phase shifting interphase transformers have a primary winding and at least one secondary winding. For phase shifting interphase transformers having a single secondary winding, a tap on the primary winding is connected through the secondary windings on one of the other phase shifting interphase transformers to produce a combined output having a displacement factor which preserves the displacement factors of the inputs. When the phase shifting interphase transformer has two secondary windings, the tap on the primary is a center tap which is routed through secondary windings on each of the other two phases. Higher pulse count inverters are constructed by combining outputs of the phase shifting interphase transformers with additional shifting interphase transformers to generate a combined output. For inverters with an odd number of six-pulse inverter bridges, a hierarchy of phase shifting interphase transformers produces a single "pairs" output which is in phase with and combined with the output of the remaining inverter stage by a current splitting interphase transformer to produce the final, harmonic neutralized output.
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EPE'89 Proceedings vol. III, 3rd European Conference on Power Electronics and Applications Eurogress Aachen, Oct. 9-12, 1989, Federal Republic of Germany New Rectifier Circuits w/ Low Main Pollution & Additional Low Cost Inverter for Energy Recovery.
Riley Shawn
Westerhoff Richard V.
Westinghouse Electric Corporation
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