基于ADP1046A的LLC谐振电源的设计与实现

发布时间：2018-06-07 01:07

本文选题：LLC谐振变换器 + SABER仿真　；参考：《华南理工大学》2014年硕士论文

【摘要】：上世纪70年代，美国学者提出了谐振变换器的概念，受当时电力电子技术发展水平的制约，谐振变换器在较长时间里都没有应用到实际产品中。直到本世纪初，随着电力电子技术的快速发展及超大规模集成电路的涌现，谐振变换器开始被人们所关注。由于电源在功率密度、体积、效率及电磁干扰（EMI）等方面的要求不断提高，谐振电源的优势不断凸显，这促进了谐振电源的快速发展。本文采用ADI公司的电源控制芯片ADP1046A设计了一款LLC谐振数字电源，该电源具有效率高、动态性能好等特点。LLC谐振电源按其结构可分为主电路和控制电路两部分，本文从这两部分来设计高效LLC谐振数字电源。在主电路设计方面，本文首先基于LLC谐振变换器的稳态电路模型，提出了一种计算谐振器件参数的方法；然后对主电路的功率器及主变压器进行选型及设计，原边开关管型号为IPA65R190CFD，整流管型号为BSC016N04LSG；最后采用SABER软件构建了LLC谐振电源的仿真模型，通过该仿真模型来验证主电路参数能否使满足原边开关管ZVS和副边整流管ZCS的要求，同时通过仿真结果分析所选器件是否满足应力要求及为控制电路设计提供参考。在控制电路设计方面，首先采用ADP1046A作为谐振电源的主控芯片，以此作为整个控制系统的核心，，设计出该芯片的外围电路及原副边电压电流检测电路；然后再进行驱动电路及辅助源电路设计，原边驱动器采用高压隔离驱动器ADuM4223，副边驱动器采用大电流、高速ADP3654，辅助源电路采用简单可靠的反激拓扑结构，辅助源电路控制芯片选择具有功率折返特性的NCP1234；最后通过ADP1046A的软件GUI来设置电源工作频率、死区时间、过压过流门限、滤波环路等控制参数。最后对电源的各项指标进行测试，通过对比分析测试结果可知，本文设计的LLC谐振电源在效率、动态响应等方面具有较强的优势，具有较好的实际应用价值。
[Abstract]:In the 1970s, American scholars put forward the concept of resonant converter. Limited by the development level of power electronics technology at that time, resonant converter has not been applied to practical products for a long time. Until the beginning of this century, with the rapid development of power electronics technology and the emergence of VLSI, resonant converters began to be concerned. Due to the increasing power density, volume, efficiency and electromagnetic interference (EMI) requirements, the advantages of the resonant power supply are constantly highlighted, which promotes the rapid development of the resonant power supply. In this paper, a LLC resonant digital power supply is designed with the power supply control chip ADP1046A of ADI Company. The power supply has the characteristics of high efficiency and good dynamic performance. According to its structure, the resonant power supply can be divided into two parts: the main circuit and the control circuit. This paper designs an efficient LLC resonant digital power supply from these two parts. In the design of main circuit, based on the steady-state circuit model of LLC resonant converter, a method to calculate the parameters of resonator is proposed, and then the power device and transformer of the main circuit are selected and designed. The primary switch tube is IPA65R190CFDD and the rectifier is BSC016N04LSG.The simulation model of LLC resonant power supply is constructed by using SABER software, and the main circuit parameters can satisfy the requirements of ZVS and ZCS. At the same time, the simulation results are used to analyze whether the selected device meets the stress requirement and provide reference for the design of control circuit. In the aspect of control circuit design, ADP1046A is first used as the main control chip of resonant power supply, which is the core of the whole control system. The peripheral circuit of the chip and the detecting circuit of primary and secondary side voltage and current are designed. Then the drive circuit and auxiliary source circuit are designed. The primary side driver uses high voltage isolation driver ADuM4223, the secondary side driver adopts high current and high speed ADP3654, and the auxiliary source circuit adopts a simple and reliable flyback topology. The auxiliary source circuit control chip selects NCP1234 with power reentrant characteristics. Finally, the control parameters such as power supply frequency, dead-time, overvoltage overcurrent threshold, filter loop and so on are set by ADP1046A software GUI. Finally, through the comparison and analysis of the test results, the LLC resonant power supply designed in this paper has strong advantages in efficiency, dynamic response and so on, and has good practical application value.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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