Abstract
In this paper a Power Factor Control (PFC) for an AC-DC boost converter operating in light load condition has been presented. A Passivity-Based current control able to operate in either Continuous Conduction Mode (CCM) and in Discontinuous Conduction Mode (DCM) has been implemented. A voltage PI-based control with input feedforward has been implemented in order to increase Power Factor (PF) and regulate the DC output A current observer, suitable for both operating modes has been adopted in order to eliminate the need for expensive current sensor. The proposed Mixed Conduction Mode (MCM) control scheme has been numerically tested using a powerful software simulation platform and compared to classical CCM control scheme.
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