Current-type converter protecting apparatus

Electric power conversion systems – Current conversion – Including automatic or integral protection means

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Details

363129, 361 91, 361100, H02H 7125

Patent

active

047574364

ABSTRACT:
In a current-type converter system in which a DC current is fed to a load through a pulsating current suppressing DC reactor from a current-type converter constituted by self-extinction elements connected in a bridge circuit, a converter protection apparatus is arranged such that when a fact that a terminal voltage of the DC reactor becomes an overvoltage is detected, the self-extinction elements are turned on so as to form a closed circuit including the DC reactor, the load, and the converter so that the overvoltage can be suppressed and continuous operation of the converter can be carried out.

REFERENCES:
patent: 3622862 (1971-11-01), Boksjo
patent: 4044295 (1977-08-01), Ferraiolo et al.
Yoshioka et al., "PWM GTO CONVERTER OF NEW COMMUTATION ENERGY SYSTEM", IEEE of Japan, Semiconductor Power Conversion Society, SPC-84-60.
Viriya et al., "NEW PWM-CONTROLLED GTO CONVERTER", IEEE Power Electronics Specialists Conference '85 Record, pp. 581-589.

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