能量回馈型直流电子负载的研究

发布时间：2018-05-12 02:18

本文选题：线性电子负载 + 开关型电子负载　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：负载作为电源测试的必需品,它的发展与应用变得日益复杂化,传统的静态负载已很难满足测试需求。线性电子负载凭借高动态响应的优势,虽然得到广泛使用,但也受到功率等级的限制,且能量消耗很大。开关型电子负载可以实现能量回馈,符合国家节能减排的要求,并且提升了测试负载的功率等级。本文根据线性电子负载和开关型电子负载的优缺点,采用线性负载与开关型负载协同工作的方式,使其优势互补,提高电子负载的动态响应速度,并可实现能量回馈,提高负载效率,对输入电流纹波进行一定程度的补偿缩小。本文对功率MOSFET作为线性电子负载进行研究,分析其工作原理并设计了具有高带宽运算放大器的驱动电路,使线性负载具有较高的动态响应。分析MOSFET等效模型及运算放大器环路稳定性,设计线性负载的补偿网络,确保线性电子负载单元工作的可靠性。在此基础上介绍多路线性负载并联的方式,拓宽线性负载的功率等级。各并联支路采用相互独立的驱动电路,可近一步提高线性电子负载的动态响应速度。本文选取Switching-Boost开关型电子负载进行研究,分析其工作原理并计算拓扑参数。并基于输入滤波器的作用,可减小输入电流纹波。介绍变换器小信号建模分析,并对输入电流进行闭环补偿网络设计,提高负载模拟精度。同时该变换器具有较宽的输入电压范围,还可以实现能量回馈。论文介绍了线性电子负载与开关型电子负载协同工作机理,分析电流镜采样电路,并设计线性负载基准值给定电路。通过控制线性负载电流,在负载切换时刻将线性负载投入使用,以此提高电子负载的动态响应速度。并在电路达到稳态时,控制线性负载电流呈三角波的形式,补偿输入电流纹波。同时设计了母线电压采样电路和配电开关驱动电路,使电子负载工作于安全的电压范围内。
[Abstract]:As the necessity of the power test, the development and application of the load become increasingly complex, and the traditional static load has been difficult to meet the requirement of testing. The linear electronic load has the advantage of high dynamic response. Although it is widely used, it is also limited by the power level and can be consumed greatly. The switched electronic load can achieve the energy. Based on the advantages and disadvantages of linear electronic load and switch type electronic load, this paper uses linear load and switch type load to work together to make its advantages complementary, improve the dynamic response speed of electronic negative load, and achieve energy feedback and increase. The load efficiency reduces the input current ripple to a certain extent. This paper studies the power MOSFET as a linear electronic load, analyzes its working principle and designs a driving circuit with a high bandwidth operational amplifier to make the linear load have a high dynamic response. The MOSFET equivalent model and the loop stability of the operational amplifier are analyzed. Qualitatively, the compensation network of linear load is designed to ensure the reliability of linear electronic load unit work. On this basis, the mode of multichannel linear load parallel is introduced and the power level of linear load is widened. The dynamic response speed of linear electronic load can be improved by the independent driving circuit of each parallel branch. This paper selects S in this paper. The witching-Boost switch type electronic load is studied, its working principle is analyzed and the topology parameters are calculated. Based on the function of the input filter, the input current ripple can be reduced. The small signal modeling analysis of the converter is introduced, and the closed loop compensation network for the input current is designed to improve the precision of the load simulation. At the same time, the converter is more wide. The input voltage range and the energy feedback can be realized. The paper introduces the cooperative working mechanism of the linear electronic load and the switch type electronic load, analyzes the current mirror sampling circuit, and designs the given circuit of the linear load reference value. By controlling the linear load current, the linear load is put into use at the load switching time to improve the electronic load. When the circuit reaches steady state, the control linear load current is in the form of triangular wave, and the input current ripple is compensated. At the same time, the bus voltage sampling circuit and the distribution switch drive circuit are designed to make the electronic load work in the safe voltage range.

【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM46

【参考文献】