Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1993-04-26
1996-02-06
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 21, 363 95, 363 97, 363131, H02M 328
Patent
active
054900522
ABSTRACT:
A switching power supply supplies a regulated output voltage for an electronic apparatus in industrial or commercial use and suppresses generation of a spike voltage and a spike current due to a transformer, and a recovery voltage of a rectifying diode due to switching and it results in reduction of noise interference and power loss. A series connection of a first switching means and a second switching means repeating on/off action alternately is connected to a d-c source. A series connection of a first capacitor and a primary winding of a transformer is connected in parallel with the second switching means. An induced voltage in a secondary winding is supplied to an output through a rectifying/filtering means. A series resonance current in a closed circuit comprising the first capacitor and a leakage inductance suppresses spike voltage, spike current, and recovery voltage of the rectifying diode.
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Ishii Takuya
Nagagata Nobuyoshi
Yoshida Koji
Matsushita Electric - Industrial Co., Ltd.
Sterrett Jeffrey L.
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