Thyristor connection with overvoltage protection

Details Thyristor connection with overvoltage protection Thyristor connection with overvoltage protection

1978-05-16

1980-12-02

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

307252R, 361 91, 363 54, 363 57, H02H 320

Patent

active

042375096

ABSTRACT:
A thyristor overvoltage protection circuit wherein an avalanche diode conducts to divert overvoltage energy from a thyristor to avoid self-ignition of the thyristor when the overvoltage reaches a particular level. A simulator circuit monitors the thermal loading on the conducting diode and activates an ignition pulse device if the thermal loading exceeds the safe operational range of the diode. The activated ignition pulse device ignites the thyristor so that the thyristor may divert the overvoltage energy and thereby discharge the diode.

REFERENCES:
patent: 3067375 (1962-12-01), Jensen
patent: 3412312 (1968-11-01), Rice
patent: 3444398 (1969-05-01), Brockway
patent: 3599075 (1971-08-01), Etter et al.
patent: 3794908 (1974-02-01), Lindblom et al.
patent: 3865438 (1975-02-01), Boksjo et al.
patent: 3878451 (1975-04-01), Ostlund et al.
patent: 4059792 (1977-11-01), Etter et al.

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