Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1989-09-28
1990-07-17
Budd, Mark O.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 37, 363137, H02M 7521
Patent
active
049425110
ABSTRACT:
A high efficiency power converter is achieved which eliminates the needs for self-commutated devices and requires only twelve thyristors for full double bridge AC/AC power conversion. The system utilizes a series resonant DC link between the AC/DC and DC/AC converters. The DC resonant circuit functions as a commutating circuit which ensures turn off of all twelve thyristors by providing the necessary zero current instants. A significantly improved sinusoidal current waveform can be obtained on both the input and the output compared to conventional high power converters by the use of high frequency pulse density modulation.
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Lipo Thomas A.
Murai Yoshihiro
Budd Mark O.
Sterrett Jeffrey
Wisconsin Alumni Research Foundation
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