Abstract
Characteristics of a parallel-module high power-factor AC-to-DC power converter system using current-balancing controllers are presented. Problems caused by the parallel connection of power factor correction (PFC) power converter modules are discussed. Two types of current-balancing controllers, i.e. conventional and improved, are applied to the parallel-module PFC system to share the load current between the power converter modules. The effectiveness of the current-balancing controllers for the PFC power converter system is confirmed by experiment. The current-balancing controller improved here has fast transient response to load current sharing under dynamic conditions.
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