Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1995-06-15
1997-10-07
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
363 21, 363 65, H02M 3335
Patent
active
056754833
ABSTRACT:
A power supply with improved power factor comprises a first rectifier circuit connected to an electric mains and which has first output terminals for supplying a first pulsating direct voltage. A buffer capacitor is connected parallel to the first output terminals and an inverter is connected to the buffer capacitor. A second rectifier circuit is connected to the mains and has second output terminals for supplying a second pulsating direct voltage. A flyback converter is connected to the second output terminals and has output terminals connected parallel to the buffer capacitor. The converter increases the power factor of the power supply and is operative to supply a maximum power which is substantially lower than the maximum power of the first rectifier circuit. The converter comprises a transformer with a primary winding and a secondary winding. The primary winding is connected in series with a switching element in order to form a primary series circuit connected to the second input terminals and the secondary winding is connected in series with a rectifier element in order to form a secondary series circuit connected to the second output terminals.
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Fennik Hans
Rademaker Gerrit
Blocker Edward
Sterrett Jeffrey L.
U.S. Philips Corporation
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