Artificial commutation of static converters

Artificially commutated converters are proposed in order to eliminate the need for lagging a-c supplies and lead a-c loads for conventional rectifying and inverting circuits. An artificial commutating circuit is present and analyzed. Expressions for the commutating time, overlap, and commutating energy requirements are derived. Test data show how an auxiliary voltage can satisfactorily cause commutation in those regions where reactive energy is returned to the a-c system of the static converter.