Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1983-07-21
1985-03-26
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 40, 363 45, H02N 3335
Patent
active
045077215
ABSTRACT:
A floating type DC-DC converter for remote power feeding is connected via a power separating filter to a signal line on which an AC signal is superimposed on DC power. The DC power separated by the power separating filter is stored in an input capacitor and is supplied by a switching operation of a switching element to the primary winding of a transformer and AC power induced in its secondary winding is supplied to an output capacitor after being rectified by a rectifying element. An electrostatic shield layer is interposed between the primary and secondary windings of the transformer and is connected to the capacitor connected to one of the primary and secondary windings. Rectifying element or switching element connecting means is provided by which an AC voltage induced in the winding portion on one side of the center winding point of the other of the primary and secondary windings and an AC voltage induced in the winding portion on the other side of the center winding point of said other winding are made substantially symmetrical with respect to the center winding point, opposite in polarity and substantially equal in amplitude to each other.
REFERENCES:
patent: 3936719 (1973-11-01), Miyoshi et al.
patent: 4089049 (1978-05-01), Suzuki et al.
patent: 4335423 (1982-06-01), Koizumi et al.
patent: 4406978 (1983-09-01), Goseberg et al.
Toshiyuki Sugiura et al. Power Feed Equipment for Medium/Small Capacity Optical Fiber Transmission Systems, Kenkyu Jitsuyoka Hokoku (E.C.L. Tech. Jour.), NTT, Japan, vol. 30, No. 9, pp. 2247-2256, 1981.
Ogiwara Haruo
Yamano Seiichi
Jones Judson H.
Nippon Telegraph & Telephone Public Corporation
Wong Peter S.
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