风致振动压电能量采集器的电源管理电路研究

发布时间：2019-06-18 16:21

【摘要】：风能是自然界中广泛存在的一种可再生清洁能源，将环境中的风能转换为电能的微能源在无线传感、自治式微系统等领域具有极大的应用前景，基于风致振动机理的压电风能采集器具有结构简单、功率密度大、可微型化等诸多优点，近几年受到国内外广泛关注。由于微型风能采集器输出的是交流电，并且平均输出功率较低，研究低功耗的高效电源管理电路对推广其应用具有十分重要的意义。基于悬臂梁压电振动能采集器集总参数模型，建立了包含充电电路在内的悬臂梁压电能量采集器的理论模型，在此基础上对常见的四种充电电路进行了分析和仿真；针对微型风致振动压电能量采集器的输出特点，设计了充电电路，完成了充电电路的调试。主要研究内容包括： ①查阅文献，分析总结了微型振动能和风能采集器及相应的电源管理电路的国内外研究现状； ②基于悬臂梁压电振动能采集器的集总参数模型，建立了分别包含标准能量采集电路(SEH)、同步电荷提取电路(SCE)、并联同步开关电感电路(P-SSHI)和串联同步开关电感电路(S-SSHI)的悬臂梁压电振动能采集器的模型，得到了功率的表达式，仿真结果表明，，在激励较大的理想情况下，基于同步开关的充电电路具有更好的性能； ③完成了风致振动压电能量采集器充电电路的设计与仿真，通过对现有充电电路进行优化，增大了充电电路输出功率。仿真结果表明，优化电路的输出功率提高约27.7%； ④完成了基于同步开关的充电电路的版图设计，实验结果表明，当风速为14.2m/s，同标准能量采集电路相比，本文的充电电路可以使电容器电压提高约74%，电容器上存储的电能约增加2倍，因此本文的充电电路显著提高了充电效率。
[Abstract]:Wind energy is a kind of renewable clean energy which is widely existed in the natural world, and the micro-energy source for converting the wind energy in the environment into electric energy has great application prospect in the fields of wireless sensing, autonomous micro-system and the like, and the piezoelectric wind energy collector based on the wind-induced vibration mechanism has the advantages of simple structure, The power density is large, and can be miniaturized and the like, and has been widely concerned at home and abroad in recent years. Because the output of the micro-wind energy collector is an alternating current, and the average output power is low, the high-efficiency power management circuit with low power consumption is of great significance to the popularization of the application. Based on the lumped parameter model of the cantilever piezoelectric vibration energy collector, the theoretical model of the piezoelectric energy collector of the cantilever beam, including the charging circuit, is established, and the four charging circuits are analyzed and simulated on the basis of the model. In view of the output characteristic of the micro-wind-induced vibration piezoelectric energy collector, the charging circuit is designed, and the regulation of the charging circuit is completed. Test. Main study content package In this paper, the author reviews the literature and summarizes the research and development of the micro-vibration energy and the wind energy collector and the corresponding power management circuit at home and abroad A Study of the Current Situation and the Current Set of the Piezoelectric Vibration-energy Collector Based on the Cantilever Beam The model of the cantilever piezoelectric vibration energy collector with the standard energy acquisition circuit (SEH), the synchronous charge extraction circuit (SCE), the parallel synchronous switch inductance circuit (P-SSHI) and the series synchronous switch inductance circuit (S-SSHI) is established. The simulation results show that the charging circuit based on the synchronous switch has the advantages of high excitation, better performance; the invention completes the design and simulation of the charging circuit of the wind-induced vibration piezoelectric energy collector, The electrical circuit is optimized to increase the charge The simulation results show that the output power of the circuit is improved. The design of the design of the charging circuit based on the synchronous switch is completed. The experimental results show that when the wind speed is 14.2 m/ s, the charging circuit in this paper can make the capacitor The voltage of the device is increased by about 74%, and the electric energy stored on the capacitor is increased by about 2 times, so the charging circuit of the present invention
【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】：TM619

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