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Inductive idling boost PFC converter is proposed in this paper, which benefits with improved power factor and dynamic response speed compared with conventional DCM boost PFC converter. The additional degree of control-freedom introduced by inductor current idling state has been exploited through a simple control technique to achieve power factor correction. Compared with DCM boost PFC converter, the...
Dynamic response of boost power factor correction (PFC) converter operating in continuous-conduction mode (CCM) is heavily influenced by low-bandwidth of voltage control loop. A novel tri-state boost PFC converter operating in pseudo-continuous-conduction mode (PCCM) is proposed in this paper. An additional degree of control-freedom introduced by a freewheeling switching control interval helps to...
Input current distortion is a common phenomenon when the input voltage is at the zero-crossing in power factor correction (PFC) converters. This paper analyzes the cause of zero-crossing distortion and indicates that input current leading the input voltage is the key reason for non-unity fundamental displacement factor and the zero-crossing distortion in boost PFC converter. The zero-crossing distorted...
This paper deals with specific problems encountered when full digital control is applied for the boost-type power factor correction (PFC) converter. The robust performance, voltage regulation and sample frequency of the proposed controller are highlighted. Compared with traditional design, a novel input voltage feed-forward control algorithm is proposed to reduce the closed-loop time constant and...
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