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
Isolated DC-DC Power Converters for Simultaneous Charging of Electric Vehicle Batteries: Research Review, Design, High-Frequency Transformer Testing, Power Quality Concerns, and Future
TL;DR: A review of the existing research and technology of isolated DC-DC converters for simultaneous charging of EV batteries is provided in this paper , which might involve charging two-and four-wheelers simultaneously, even though their battery voltage ratings differ.
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
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TL;DR: In this article, a phase modulated full bridge resonant transition converter (PMRTC) is used for high-gain, high-power applications, as PMRTC converters retain the qualitative nature of hard switched pulse-width modulation counterparts with additional damping, where $R_d$ is load, transformer turns ratio and frequency dependent.
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- 18 Jun 2015
TL;DR: Efficiency comparison of quadratic boost converter in continuous conduction mode (CCM) and discontinuous conduction modes (DCM) is presented and Analytical expression for the DC component and RMS component of currents in CCM and DCM is derived.
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TL;DR: In this paper, the authors proposed a new control algorithm to increase efficiency of a grid-connected photovoltaic power generating system, which finds a maximum efficiency point by considering the quantity of power generated from PV arrays, the number of inverters, and an efficiency of the inverter.
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