Title:
SERIES THYRISTOR FIRING DEVICE BY LIGHT AUXILIARY THYRISTOR
Document Type and Number:
Japanese Patent JPS5725163
Kind Code:
A
Abstract:
PURPOSE:To reduce the number of light auxiliary thyristors by controlling with light the light auxiliary thyristors connected in series with the primary coil of a pulse transformer. CONSTITUTION:The primary coil of a pulse transformer PT is connected among main thyristors TH1, TH2, THN, and a light auxiliary thyristor PTH and a gate current suppressing resistor R are connected in series with the primary coil of the pulse transformer PT. A light guide is communicated between the light auxiliary thyristor PTH and a firing controller connected to the ground potential. Accordingly, the thyristors TH1, TH2, TH3 can be simultaneously fired by the gate current pulse.
Inventors:
MOTOYOSHI OSAMU
SHIRAISHI HIROTAKA
SHIRAISHI HIROTAKA
Application Number:
JP9747880A
Publication Date:
February 09, 1982
Filing Date:
July 18, 1980
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H02M1/092; H03K17/78; (IPC1-7): H02M1/08; H03K17/72