High voltage charging circuit for charging a high voltage...

Details High voltage charging circuit for charging a high voltage... High voltage charging circuit for charging a high voltage...

2006-01-03

2006-01-03

Berhane, Adolf (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S097000

Reexamination Certificate

active

06982882

ABSTRACT:
A high voltage charging circuit includes an activation control circuit, an inactivation control circuit and a power transistor. The activation control circuit is used for controlling an ON time period of the power transistor to enable the transformer to store excited-magnetic energy; the inactivation control circuit is used for controlling an OFF time period of the power transistor to make the transformer to release the excited-magnetic energy and use the excited-magnetic energy to charge the high voltage capacitor. Since the user can select a smaller Lp to keep constant the maximum value IP,maxfor the primary side current IP, the period tONcan be made smaller as well, which means that a transformer14with a smaller volume can be utilized to reduce the entire size of the high voltage charging circuit.

REFERENCES:
patent: 6362984 (2002-03-01), Gekinozu
patent: 6396718 (2002-05-01), Ng et al.
patent: 6473317 (2002-10-01), Simopoulos
patent: 6590789 (2003-07-01), Bailly

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