Journal Article10.1109/TPEL.2020.3026239
Maximum Efficiency Average Current Controller Based on a Comprehensive Charge Rate Model for DCM Boost PFC Converter
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TL;DR: In this paper, the authors investigated modeling and control approaches to optimize the efficiency and power factor for discontinuous conduction mode boost power factor correction converters, and proposed a maximum efficiency average current (MEAC) controller to regulate the input current while maintaining the maximum efficiency.
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Abstract: This article investigates modeling and control approaches to optimize the efficiency and power factor for discontinuous conduction mode boost power factor correction converters. First, with detailed consideration of parasitics and GaN HEMT transients, the input and output charges of the converter are exactly derived, where the rate forms the comprehensive charge rate (CCR) model. Second, based on the CCR model, the overall efficiency is derived. Since the overall efficiency is only related to the input voltage, output voltage, and switching on -time, an optimal on -time is calculated to achieve the maximum efficiency. Furthermore, with the optimal on -time, a maximum efficiency average current (MEAC) controller is proposed to regulate the input current while maintaining the maximum efficiency. With the predefined optimal on -time, a switching cycle modulation method is adopted to regulate the input current as sinusoid, which improves the power factor to unity. Finally, effectiveness of the MEAC control strategy is verified by simulations and experiments. Compared with conventional constant on -time control, it achieves an optimized efficiency and power factor over a large operation range.
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Citations
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Current Zero-Crossing Prediction-Based Critical Conduction Mode Control of Totem-Pole PFC Rectifiers
TL;DR: In this article , an inductor current estimator model was proposed to estimate the averaged current and to predict the current zero-crossings in a totem-pole Boost power factor correction converter.
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Current Zero-Crossing Prediction-Based Critical Conduction Mode Control of Totem-Pole PFC Rectifiers
TL;DR: In this paper , an inductor current estimator model is proposed to estimate the averaged current and to predict the current zero crossings. But the model is not suitable for the case where the sensing signal is replaced by estimated values and the zero-current detection circuit is removed.
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A Unified Control for PFC Converter With Seamless Transition Between PWM/PFM Modes
TL;DR: In this article , a unified control method was proposed to achieve both pulsewidth modulation control and pulse frequency modulation control, which is based on the virtual impedance principle, by comprehensively considering current ripple, switching frequency, and efficiency, the converter can operate flexibly in the situation of variable loads.
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Parallel Fixed Switching Frequency CRM and DCM Boost PFC Converter With High Power Factor
TL;DR: In this paper , the authors proposed a harmonic elimination parallel control to connect critical conduction mode (CRM) and DCM boost power factor correction (PFC) converters in parallel.
2
References
Maximum Efficiency Point Tracking for Two-Stage Server Power Supply
Yen-Shin Lai,Min-Hsiang Yu +1 more
- 01 Nov 2019
TL;DR: Test results derived from a digital- controlled server power supply show that maximum efficiency can be tracked by tuning DC link voltage, and fully support the effectiveness of the proposed maximum efficiency point tracking technique.
1
A Nonlinear Controller Based on a Discrete Energy Function for an AC/DC Boost PFC Converter
TL;DR: In this paper, a discrete energy function minimization (DEM) control law was proposed to allow the front-end ac/dc boost PFC converter to operate with faster dynamic response than the conventional controllers and simultaneously maintain near unity input power factor.
Adaptive LUT-Based Variable On-Time Control for CRM Boost PFC Converters
TL;DR: An adaptive look-up-table (LUT)-based variable on-time (VOT) control for CRM boost PFC converters, which combines advantages of conventional LUT method and real-time calculation method is proposed.
Line Current Distortion Compensation for DCM/CRM Boost PFC Converters
Yang-Lin Chen,Yaow-Ming Chen +1 more
TL;DR: In this article, the authors proposed a line current distortion compensation method, which is a fusion of the conventional variable on-time (VOT) control and the average current mode (ACM) control, for DCM/CRM boost PFC converter with zero current switching (ZCS)/zero voltage switching(ZVS)/valley switching (VS)/switching frequency limitation (SFL) functions.
Simple Analog-Based Accurate Variable On-Time Control for Critical Conduction Mode Boost Power Factor Correction Converters
TL;DR: In this article, a uniform and simple variable on-time (VOT) expression was proposed for analog ICs to suppress input current distortion of critical conduction mode (CRM) boost power factor correction (PFC) converters.