Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1984-06-25
1987-02-17
Shaw, Clifford C.
Electricity: motive power systems
Induction motor systems
Primary circuit control
307252C, 363 57, 363 96, 363137, H03K 1751
Patent
active
046442405
ABSTRACT:
A reverse-conducting GTO thyristor comprises a gate turn-off thyristor and a diode which are formed on a single semiconductor substrate so as to have a common layer and be connected electrically in an inverse-parallel connection. A power converter is composed of a plurality of pairs of these reverse-conducting GTO thyristors connected in series, each pair of thyristors being controlled so that they are turned on and off in opposite phases. An OFF gate pulse for one of each pair of thyristors continues from a time on or after the generation of an ON gate pulse for the other thyristor to the time when a recovery current flowing through the diode portion of the first thyristor is extinguished. The thus-extended OFF gate pulse functions to prevent any displacement current flowing through the GTO portion of the first thyristor during the recovery time for the diode portion thereof.
REFERENCES:
patent: 4016391 (1977-04-01), Kiuchi et al.
patent: 4308578 (1981-12-01), Tamura et al.
patent: 4392175 (1983-07-01), Takigami et al.
T. Yatsuo et al., "A Diode Integrated High Speed Thyristor", Proc. 2nd Conf. on Solid State Devices, 1970.
Horie Akira
Tsuboi Takashi
Hitachi , Ltd.
Shaw Clifford C.
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