Static inverter control circuit

Details Static inverter control circuit Static inverter control circuit

1975-11-10

1977-06-14

Shoop, William M.

321 11, H02M 7515

Patent

active

040300196

ABSTRACT:
Method and apparatus for effecting control of a complementary impulse commutated inverter to enable start-stop operation without power removal and to avoid start-up failures caused by inductive load flux saturation. The invention utilizes a gating logic circuit to always start inverter operation by gating a first predetermined switching element. The gating logic circuit responds to a stop command by terminating operation in a half-cycle in which the first predetermined switching element is not carrying load circuit. In one embodiment upon receipt of a stop command the gating logic circuit terminates inverter operation by applying a last gating signal to the first predetermined switching element, the last gating signal having a time duration less than that required after receipt of a gating signal for current reversal in the inductive load. The last gating pulse is effective to commutate the conducting switching element and current reversal in the load is effective to commutate the first predetermined switching element.

REFERENCES:
patent: 3133245 (1964-05-01), White
patent: 3250978 (1966-05-01), Moscardi
patent: 3263152 (1966-07-01), Walker
patent: 3324381 (1967-06-01), Bock et al.
patent: 3684936 (1972-08-01), Graf
patent: 3930194 (1975-12-01), Walker

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