High power factors, single stage harmonics correction converter

Details High power factors, single stage harmonics correction converter High power factors, single stage harmonics correction converter

1997-06-13

2000-03-14

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 80, 363 89, 363127, H02M 3335, H02M 324, H02M 542, H02M 7217

Patent

active

060381469

ABSTRACT:
An AC-to-DC power converter (power supply) with high power factors and which minimizes the input charging current flowing through the separate inductor by locating the separate inductor between a full-bridge rectifier and the transformer but out of the storage capacitor's current path. In this manner, when the input voltage is sufficiently high, the converter draws input current into the transformer through the separate inductor, while current flowing to and charging the storage capacitor is unimpeded by the separate inductor. The current being drawn through the separate inductor and into the transformer may also be used to recharge the storage capacitor. Associated losses are reduced and the separate inductor may be reduced in size. Other embodiments eliminate the second primary winding in the transformer and place a second set of windings coupled to the separate inductor between the full-bridge rectifier and the storage capacitor, which reduces the current spike when the storage capacitor is recharged with current flowing through this path.

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