Line Current Distortion Compensation for DCM/CRM Boost PFC Converters


This paper proposes a line current distortion compensation methodology, which may be a fusion of the standard variable on-time (VOT) control and the typical current mode (ACM) management, for DCM/CRM boost PFC converter with zero current switching (ZCS)/zero voltage switching (ZVS)/valley switching (VS)/switching frequency limitation (SFL) functions. During this paper, the mathematical analyses of the road current distortion for the DCM/CRM boost PFC converter with ZCS/ZVS/VS/SFL functions also are derived to explain the causes of the road current distortion. In order to increase efficiency, the ZVS/VS/SFL functions are required however the road current can be further distorted. To compensate the distorted line current, the ACM-based mostly VOT (ABVOT) management for the DCM/CRM boost PFC converter is proposed. In addition, the constant-on-time-based noise-immunity S/H method is proposed to switch the multiplier, which is usually required for the standard ACM-primarily based control. The performance of the proposed ABVOT control with S/H technique will be demonstrated by simulation and experiment results.

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