交错并联有源功率因数校正器的研究

发布时间：2018-04-02 03:15

本文选题：功率因数校正　切入点：Boost变换器　出处：《重庆大学》2014年硕士论文

【摘要】：随着电力电子技术的发展，AC-DC功率变换器广泛应用于计算机电源、通信电源、节能灯、LED照明系统、家用电器、电动机驱动变频器、不间断电源、工业电源等场合，由此产生的谐波污染和低功率因数问题也日趋严重。功率因数校正(Power-Factor-Correction，PFC)正是解决这一问题的一种有效方法。随着功率等级的不断提高，传统单相Boost PFC受功率器件的选型、成本、体积、整机效率等因素的限制，无法满足较大功率场合的应用。将交错并联技术引入到Boost PFC中，能够有效地降低输入电流纹波，减少开关管的电流应力，提高功率变换器的功率密度和效率，适合在较大功率场合应用。本文针对交错并联Boost PFC进行了具体的研究。本文首先介绍了功率因数校正技术的研究背景，阐述了功率因数校正技术的分类、拓扑结构和发展趋势。然后详细分析了电感电流连续模式下交错并联BoostPFC的工作原理和电路特性，对PFC电路的控制策略进行了比较。基于应用场合的限制以及平均电流控制的优点，采用了双闭环控制方法，详细介绍了其工作原理，，并基于电感电流合成技术搭建了仿真电路。仿真结果表明：交错并联Boost PFC有效降低了输入电流纹波，提高了功率因数，验证了电感电流合成的可行性。最后基于TI公司生产的UCC28070控制芯片，详细设计了实验主电路和控制电路的参数，搭建了交错Boost PFC实验电路。采取了分步调试的策略，获得了反映变换器工作情况的典型波形。实验结果表明交错并联电路具有很好的电流纹波抑制和高功率因数校正效果，验证了理论分析的正确性。
[Abstract]:With the development of power electronics technology, AC-DC power converters are widely used in computer power supply, communication power supply, energy saving lamp LED lighting system, household appliances, motor drive inverter, uninterruptible power supply, industrial power supply and so on. The problems of harmonic pollution and low power factor are becoming more and more serious. Power factor correction power factor correction (PFC) is an effective method to solve this problem. With the increasing of power level, the traditional single-phase Boost PFC is subjected to the selection and cost of power devices. Because of the limitation of the volume and the efficiency of the whole machine, it can not meet the application of the large power situation. Introducing the staggered parallel technology into Boost PFC can effectively reduce the ripple of input current and reduce the current stress of the switch tube. In order to improve the power density and efficiency of the converter, it is suitable for large power applications. In this paper, the interleaving parallel Boost PFC is studied in detail. This paper first introduces the research background of power factor correction technology, and expounds the classification of power factor correction technology. Then, the working principle and circuit characteristics of the interleaving parallel BoostPFC in the inductance current continuous mode are analyzed in detail, and the control strategies of the PFC circuit are compared. Based on the limitation of application and the advantages of average current control, the double closed loop control method is adopted, and its working principle is introduced in detail. The simulation circuit based on inductance current synthesis technology is built. The simulation results show that the interleaving parallel Boost PFC can effectively reduce the input current ripple, improve the power factor, and verify the feasibility of inductance current synthesis. Finally, based on the UCC28070 control chip produced by TI Company, the parameters of the main circuit and the control circuit are designed in detail, and the staggered Boost PFC experimental circuit is built. The experimental results show that the interleaving parallel circuit has good current ripple suppression and high power factor correction effect, which verifies the correctness of the theoretical analysis.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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