Control for an auxiliary commutation circuit

Details Control for an auxiliary commutation circuit Control for an auxiliary commutation circuit

1978-12-22

1980-09-30

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 96, 363135, H02H 7122, H02M 7515

Patent

active

042259126

ABSTRACT:
A supplemental or auxiliary portion of the commutation circuit for an inverter is actuated only during overload conditions which improve the inverter efficiency during normal load conditions. A control circuit responds to the increased time period of the commutation pulse to delay the firing of the thyristors which initiate the makeup pulse. This modified operation continues for at least three commutation cycles in order to ensure that the supplemental portion of the commutation circuit is properly initialized so that it is ready for subsequent overcurrent conditions.

REFERENCES:
patent: 3207974 (1965-09-01), McMurray
patent: 3249844 (1966-05-01), Jensen
patent: 3935528 (1976-01-01), Brennelsen et al.

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