Conduction through sensing and inverter protection system

Details Conduction through sensing and inverter protection system Conduction through sensing and inverter protection system

1978-09-25

1980-04-08

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 96, H02M 7515

Patent

active

041975758

ABSTRACT:
A control or protection system for a line commutated inverter detects prescribed conduction-through faults and initiates a control sequence for recovery without shutting down the inverter. A conduction sensor in each leg provides a signal representing conduction and this is compared with a signal representing the forbidden interval when conduction should not occur in that leg. When conduction is detected in a forbidden interval it normally indicates a conduction-through fault and the gating pulses are advanced for at least the next two pulses to occur immediately but with a limit of 60.degree.. This causes commutation of the legs which are carrying the conduction-through fault current provided that sufficient volt-seconds remain in the alternating current part of the circuitry.

REFERENCES:
patent: 3609507 (1971-09-01), Beck
patent: 3760258 (1973-09-01), Percorini et al.
patent: 4005350 (1977-01-01), Brenneisen
patent: 4126819 (1978-11-01), Stobbe et al.

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