Blocking circuit for thyristors

Details Blocking circuit for thyristors Blocking circuit for thyristors

1976-02-17

1977-09-27

Beha, Jr., William H.

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307252M, H02J 106

Patent

active

040513840

ABSTRACT:
A blocking circuit for thyristors comprises a DC power source coupled to a capacitor which is switched into a thyristor circuit by a switching transistor and auxiliary thyristor. A high power current pulse from the capacitor is applied to the thyristor for blocking purposes. A common blocking circuit may be switched into a plurality of thyristor circuits eliminating separate capacitors and power sources. In a second embodiment, a high power DC output voltage would be generated from a three phase current source by means of three full wave rectifiers coupled to achieve a charging process six times per cycle. This latter arrangement offers the possibility of saving the charging capacitor altogether as the rectified phases overlap with only a slight ripple.

REFERENCES:
patent: 3781645 (1973-12-01), Grom et al.
patent: 3879651 (1975-04-01), Etter

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