Fault-protection apparatus for static AC-to-AC converters and un

Details Fault-protection apparatus for static AC-to-AC converters and un Fault-protection apparatus for static AC-to-AC converters and un

1985-05-22

1987-02-10

Wong, Peter S.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363161, 361 58, 361111, H02H 7125

Patent

active

046427473

ABSTRACT:
Fault-protection is added to static AC-to-AC converter to protect the GTO devices bilaterally by adding at least two line bridges of diodes having an inductor thereacross. Fault-protection is extended to a UFC system by incorporating such inductor in the diode bridges of the GTO devices forming the bilateral switches of the UFC system. The dissipating energy is minimized by combining such fault-protection bridges. The inductors may be coupled controlled demagnetization of the inductors is provided.

REFERENCES:
patent: 3047746 (1962-07-01), Berkery
patent: 3470447 (1969-09-01), Gyugyi et al.
patent: 3493838 (1970-02-01), Gyugyi et al.
patent: 3641417 (1972-02-01), Gyugyi
patent: 4191986 (1980-03-01), Huang et al.
patent: 4328454 (1982-05-01), Okuyama et al.
patent: 4414599 (1983-11-01), Kobayashi

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