Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1994-08-09
1998-10-06
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
H02M 3335
Patent
active
058187030
ABSTRACT:
A DC/DC converter circuit to convert input source energy to output load energy, for example, a flyback converter to charge a defibrillation storage capacitor from a low-voltage battery in an implantable cardiac defibrillator. The converter allows input current to flow in the flyback inductor for a fixed time, and it allows output current to flow for a time directly proportional to average battery voltage and inversely proportional to the voltage on the capacitor being charged. When used near an electromagnetic communication link, to avoid interference, a control circuit enables and disables the converter at a maximum frequency that is substantially below the operating frequency of the communication link. In addition, the control circuit restricts the converter to transfer energy at a minimum fundamental frequency substantially above the frequency of the communication link.
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Patent Abstracts of Japan, vol. 15, No. 98 (E-1042) 8 Mars. 1991 & JP-A-02 307 361 (ELCO CO LTD) 20 Dec. 1990.
ELA Medical S.A.
Nguyen Matthew V.
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