Single-pole commutation circuit

Details Single-pole commutation circuit Single-pole commutation circuit

1978-12-08

1979-11-06

Shoop, William H.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363124, 363135, H02M 3315

Patent

active

041737792

ABSTRACT:
A commutation circuit for thyristors alternately turned ON by pulse width modulation (PWM) for the generation of a fundamental sine wave is characterized by two separate primary windings associated with respective positive and negative thyristors with a common secondary winding at the output, and two commutating networks for the respective poles, each including an auxiliary thyristor for fixed-commutation and the resonant combination of a capacitor and an inductor. The thyristors, the commutating networks, the DC source, and the output transformer have a symmetrical disposition as well as symmetrical commutation steps.

REFERENCES:
patent: 3406329 (1968-10-01), French
patent: 3621362 (1971-11-01), Schwarz
patent: 3766468 (1973-10-01), Cardwell, Jr.
patent: 3893015 (1975-07-01), Weil
patent: 4030021 (1977-06-01), Akamatsu

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