MSMA振动发电机电源管理系统的设计与研究

发布时间：2018-11-09 13:15

【摘要】：能源产业是人类社会的重要产业之一,随着工业水平及生活水平的改善,电力资源不断减少。因此对自然环境中普遍存在的振动能量进行收集,使机械振动能转换成为生活中的电能,吸引了广大研究者的关注。研究者发现,将环境中的振动能量转换成为所需要的电能可以利用磁控形状记忆合金(MSMA)的逆效应,实现对微型传感器和锂电池供电。因此,本文主要从MSMA振动能量采集实验平台及其电源管理电路着手,并进行了深入研究。首先,简要介绍了振动发电机研究背景及微型振动发电机国内外研究现状,阐明了磁控形状记忆合金材料的变形机理,并确定了本文主要的研究内容与方向。其次,根据MSMA的变形机理建立了MSMA振动发电机的数学模型,即振动应力和输出电压关系的数学模型,利用Matlab对其数学模型进行仿真,分析振动应力和输出电压之间的关系,通过振动发电机实验台上做大量振动应力与输出电压的实验,验证了仿真结果中振动应力与输出电压的关系的正确性。再次,为了收集MSMA振动能量采集装置输出的低压交流电,为负载输出稳定的直流电,提出基于DC/DC升压转换电路的电源管理系统及基于LTC3108和LTC4070的电源管理系统,并利用LTspice对两种电路分别进行仿真,进一步分析了电路的仿真结果,验证了电路输出电压的稳定性,实现了对振动能量的采集并对负载进行稳定供电。最后,设计了基于BQ25570的电源管理系统,采集振动能量来对负载进行持续供电。对BQ25570的内部结构及功能进行分析,设计了基于BQ25570的电源管理电路,并利用OrCAD对其进行仿真分析,搭建振动发电机实验平台,实验验证了此电路输入幅值或者频率发生变化的条件下,仍能够输出持续稳定的直流电,为负载提供电能,在很大程度上满足了工程应用上对振动能量的存储性能及其效率的需求。并对本文的研究成果进行了总结,指明了需要完善的研究内容,并明确了MSMA振动发电机的后续研究工作。
[Abstract]:Energy industry is one of the most important industries in human society. Therefore, the collection of vibration energy in the natural environment and the conversion of mechanical vibration energy into electrical energy in daily life have attracted the attention of many researchers. The researchers found that converting the vibration energy in the environment to the required electric energy can use the inverse effect of magnetically controlled shape memory alloy (MSMA) to supply power to micro sensors and lithium batteries. Therefore, this paper mainly starts from the MSMA vibration energy acquisition experiment platform and its power management circuit, and carries on the thorough research. Firstly, the research background of vibration generator and the research status of micro vibration generator at home and abroad are briefly introduced, the deformation mechanism of magnetic control shape memory alloy material is expounded, and the main research content and direction of this paper are determined. Secondly, according to the deformation mechanism of MSMA, the mathematical model of MSMA vibration generator is established, that is, the relation between vibration stress and output voltage. The mathematical model is simulated by Matlab, and the relationship between vibration stress and output voltage is analyzed. A large number of experiments of vibration stress and output voltage are carried out on the vibratory generator test bench to verify the correctness of the relationship between the vibration stress and the output voltage in the simulation results. Thirdly, in order to collect the low voltage AC output from the MSMA vibration energy acquisition device and output stable DC power for the load, a power management system based on DC/DC boost conversion circuit and a power management system based on LTC3108 and LTC4070 are proposed. The two circuits are simulated by LTspice, and the simulation results are further analyzed. The stability of the output voltage of the circuit is verified, the vibration energy is collected and the load is supplied stably. Finally, a power management system based on BQ25570 is designed to collect vibration energy to supply the load continuously. The internal structure and function of BQ25570 are analyzed, the power management circuit based on BQ25570 is designed, and the OrCAD is used to simulate the circuit to build the experimental platform of vibratory generator. The experimental results show that the circuit can still output steady DC power when the input amplitude or frequency of the circuit changes, which can provide power for the load. To a great extent, it meets the requirement of vibration energy storage performance and efficiency in engineering applications. The research results of this paper are summarized, the research contents that need to be improved are pointed out, and the follow-up research work of MSMA vibration generator is clarified.
【学位授予单位】：沈阳航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM31;TM619

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