Electric power conversion systems – Cascaded or combined – diverse conversions in which the... – Combined phase and frequency conversion
Patent
1979-11-19
1981-12-01
Beha, Jr., William H.
Electric power conversion systems
Cascaded or combined, diverse conversions in which the...
Combined phase and frequency conversion
363 63, 363161, H02P 1330
Patent
active
043039723
ABSTRACT:
The firing pulses to the nonload carrying bank only of the naturally commutated thyristor power circuit of a static power converter are retarded to reduce or eliminate the interbank circulating current. In one form of the invention, half wave rectified load current signals are summed with the output waveform reference signal applied to the positive and negative bank firing pulse generators in a sense to retard the pulses in the nonload carrying bank. In another form of the invention, the inversion end stops are used to generate the retarded firing pulses in the nonload carrying bank.
REFERENCES:
patent: 3568033 (1971-03-01), Gyugyi
patent: 3852654 (1974-12-01), Gyugyi
Pelly, Thyristor Phase-Controlled Converters and Cycloconverters, Wiley-Interscience, 1971, pp. 126-144, 151-160, & 190-198.
Baker Donal E.
Doughman Charles L.
Jessee Ralph D.
Stacey Eric J.
Beha Jr. William H.
Telfer G. H.
Westinghouse Electric Corp.
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