Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1998-10-15
1999-11-16
Hecker, Stuart N.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, 363 56, H02M 3335
Patent
active
059868988
ABSTRACT:
Switched-mode power supplies require a power factor correction circuit in order to comply with anticipated regulations for the harmonic load on the line network. In its second current path, which produces a connection between a rectifier element and a tap on the primary winding of a transformer, the switched-mode power supply contains a capacitor which produces current limiting for an inductance in this current path. When the switching transistor is in the switching mode the inductance is charged, when the switching transistor is switched on, in the sense of an energy store until the capacitor is charged. When the switching transistor is switched off, the inductance and the capacitor are discharged via a diode in the direction of an energy-storage capacitor.
REFERENCES:
patent: 4486823 (1984-12-01), Palm
patent: 5349515 (1994-09-01), Megeid
patent: 5402330 (1995-03-01), Megeid
patent: 5619404 (1997-04-01), Zak
patent: 5673184 (1997-09-01), Rilly et al.
patent: 5673185 (1997-09-01), Albach et al.
*** Corresponds to RCA 87099, A continuation of PCT Appln. PCT/EP91/01448.
Integrated Circuits, Unitrode Corporation, Power Supply Controls, Lloyd H. Dixon, Jr. "High Power Factor Preregulators for Off-Line Power Supplies", pp. 6-1 through 6-14.
Louvel Jean-Paul
Meitzner Michael
Deutsche Thomson-Brandt GmbH
Han Y. J.
Hecker Stuart N.
Henig Sammy S.
Laks Joseph J.
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