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
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.
Grouped Valley Switching Control to Optimize Efficiency and THD for DCM Boost PFC Converters
Wanyang Wang,Run Min,Desheng Zhang,Huangpeng Zhang,Qiaoling Tong,Han Peng,Xuecheng Zou +6 more
TL;DR: Grouped valley switching control optimizes efficiency and THD for DCM boost PFC converters by grouping optimal valleys and adaptively controlling the on-time based on oscillation duration.
Optimized Valley Skipping Strategy to Improve Efficiency and Reduce THD for DCM Boost PFC Converter
Wanyang Wang,Lei Zhu,W. J. Zhang,Baoqiang Huang,Run Min,Qiaoling Tong,Shuo Zhang,Yinyu Wang +7 more
- 11 Dec 2023
Outer loop parameter tuning method for Boost PFC balancing dynamic response and reference current
Xiaowei Wu,Hongzhao Liu +1 more
TL;DR: A novel outer-loop compensator method is proposed for boost PFC converters, using non-dominated sorting and hierarchical clustering algorithms to balance dynamic response and reference current accuracy, improving output voltage performance while maintaining reference current accuracy.
References
Ultraflat Interleaved Triangular Current Mode (TCM) Single-Phase PFC Rectifier
TL;DR: In this paper, a triangular current mode (TCM) rectifier with a low height of 5 mm has been realized and measurement results are provided in order to validate the theoretical considerations.
314
Review of GaN totem-pole bridgeless PFC
Qingyun Huang,Alex Q. Huang +1 more
- 23 Nov 2017
TL;DR: Based on the power density comparison, the high frequency soft-switching GaN totem-pole PFC is the preferred choice to achieve both high efficiency and high power density at the same time.
An Analytical Model for False Turn-On Evaluation of High-Voltage Enhancement-Mode GaN Transistor in Bridge-Leg Configuration
TL;DR: In this article, an analytical circuit model that combines the circuit parameters with intrinsic characteristics of the high-voltage GaN transistor and antiparallel diode is proposed to provide design guidelines for mitigating false turn-on of GaN transistors.
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A 1 MHz Half-Bridge Resonant DC/DC Converter Based on GaN FETs and Planar Magnetics
TL;DR: In this paper, a 1 MHz half-bridge resonant dc/dc converter based on GaN FETs and planar magnetics is proposed, which improves the system efficiency and power density.
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Low-Cost Maximum Efficiency Tracking Method For Wireless Power Transfer Systems
TL;DR: In this paper, a novel maximum efficiency point (MEP) tracking method for wireless power transfer (WPT) systems is presented, where the MEP can be tracked without a power or current sensor, hence reducing the tracking cost.
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