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US08344706B2 System and method for rejecting DC current in power factor correction systems 有权
在功率因数校正系统中拒绝直流电流的系统和方法

System and method for rejecting DC current in power factor correction systems
Abstract:
A power factor correction (PFC) system includes a direct current (DC) module, an error control module, an offset module, and a duty cycle control module. The DC module determines an average current value based on a plurality of current values over at least one cycle of an input alternating current (AC) line signal of the PFC system. The error control module generates an error signal based on the average current value. The offset module offsets a desired instantaneous current based on the error signal. The duty cycle control module controls at least one duty cycle of switches of the PFC system based on the offset desired instantaneous current.
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