Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1993-06-09
1995-06-13
Dougherty, Thomas M.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
H02M 7521
Patent
active
054249376
ABSTRACT:
An electric power converter comprising a plurality of reactors, a plurality of self quenching type switching elements, the reactors and switching elements being series-connected per one arm, and surge-absorbing snubber circuits connected in parallel to the switching elements respectively, the switching circuits being driven by gate drive circuits connected to respective gates of the switching elements to thereby convert a DC voltage into an AC voltage or convert an AC voltage into a DC voltage. The electric power converter further comprises: an apparatus for recovering energy accumulated on at least one side of the reactors and the snubber circuits and an apparatus for generating a DC source for supplying electric power to each of the gate drive circuits, on the basis of the recovered energy. In the electric power converter constituted by a plurality of self quenching type semiconductor switching elements connected in series, high efficiency is attained through reduction in size of the gate driver and electric power saving.
REFERENCES:
patent: 3070738 (1962-12-01), Meys
patent: 4441032 (1984-04-01), Sakurai et al.
European Search Report (3 pages) Apr. 27, 1994.
"A Low Loss Turn-on Turn-off Snubber for GTO-Inverters", Conference Record of the 1987 IEEE Industry Applications Society Annual Meeting, Part I, pp. 607-612.
Aizawa Hidetoshi
Hombu Mitsuyuki
Iyotani Ryuji
Narita Hiroshi
Ueda Akiteru
Dougherty Thomas M.
Hitachi , Ltd.
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