Abstract
Principles of traditional Boost PFC circuit are introduced. Based on average current control, a large signal model is obtained and turned into small signal model carrying constant load. And current regulator and voltage regulator are designed accordingly. Directing at strong non-linear characteristics of the circuit, this paper adopts double average method to analyze its low frequency stability. This converter can achieve high power factor in wide range of input and load power and simulation result shows that power factor is above 0.99.
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