Harmonic blocking converter system

Details Harmonic blocking converter system Harmonic blocking converter system

1994-02-08

1995-08-29

Stephan, Steven L.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 43, 363 71, 307105, H02M 112

Patent

active

054466431

ABSTRACT:
A harmonic blocking converter system for converting power between an AC source and a DC source includes a harmonic blocking transformer and a converter which generates undesirable harmonic currents including fifth and seventh harmonic components. The harmonic blocking transformer includes a polyphase main transformer and a harmonic blocker coupled with wye and delta secondary windings of the main transformer, so as to substantially block passage of the fifth and seventh harmonic currents to the AC source. A waveform enhancer may couple the harmonic blocking transformer with the converter. The converter may be constructed for 2-level operation, or, with the addition of auxiliary diodes, for 3-level operation. Such a harmonic blocking transformer and a method of blocking undesirable harmonic currents are also provided.

REFERENCES:
patent: 3876923 (1975-04-01), Humphrey et al.
patent: 5138544 (1992-08-01), Jessee
patent: 5198746 (1993-03-01), Gyugyi et al.

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