Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1996-10-30
1998-10-27
Hecker, Stuart N.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 21, 315411, H02M 3335, H01J 2970
Patent
active
058285571
ABSTRACT:
A flyback transformer which comprises: a primary-side coil; a secondary-side high-voltage coil divided into a predetermined number of coil pieces; high-voltage rectifier diodes connected, in the same polarity, in series with the coil pieces respectively so as to form a series circuit as a whole; a high-voltage capacitor connected to a cathode side of one of the high-voltage rectifier diodes located in a final stage of the series circuit; and an in-phase high-voltage coil reversely connected to the one high-voltage rectifier diode in the final stage of the series circuit so that a reverse pulse generated by the in-phase high-voltage coil is superimposed on the cathode side of the one high-voltage rectifier diode. Thus, an alternating electric field can be reduced without using any expensive externally-provided high-voltage capacitor which is insulated by an exterior housing and injection resin to thereby make it possible to provide a flyback transformer which is inexpensive in cost, which is high in reliability in view of insulation, and which is easy in handling.
REFERENCES:
patent: 4639663 (1987-01-01), Ueno et al.
patent: 4866353 (1989-09-01), Haferl
patent: 5043598 (1991-08-01), Maeda et al.
patent: 5218270 (1993-06-01), Haapakoski
patent: 5394067 (1995-02-01), Santelmann, Jr.
patent: 5466994 (1995-11-01), Akimoto et al.
patent: 5644198 (1997-07-01), Park
Mochida Hideyuki
Sugawara Yoshihiko
Hecker Stuart N.
Hitachi Media Electronics Co. Ltd.
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