一种高效压电式能量回收接口电路的优化设计

阐述了几种压电发电机接口电路的工作过程和原理,包括标准能量回收电路,同步电荷提取电路,并联同步开关电感电路,串联同步开关电感电路和双同步开关电感电路,并从阻抗匹配角度分析了以上五种电路输出最大功率时的最佳负载阻抗范围。为了最大化地回收自然界中的振动能量,以双同步开关电感电路为例,针对其控制过程复杂且要求精确的特点,提出了一种具体的硬件电路实施策略并进行了Pspice仿真。仿真结果与理论值吻合。

Design and optimization of the interface circuit of a high-efficiency piezoelectric vibration energy harvester

The working processes and principles of five kinds of interface circuits of piezoelectric energy harvester were introduced,including the standard energy harvesting,synchronous electric charge extraction harvesting,parallel synchronized switch harvesting on inductor,series synchronized switch harvesting on inductor and double synchronized switch harvesting.Also,from the view of impedance matching,the maximum output powers and the corresponding resistance loading of five kinds of circuits were studied.In order to maximizing the vibration energy harvesting,an interface circuit for the double synchronized switch harvesting,which has a complex process and requires precise control,was designed and optimized as well as simulated with Pspice.The simulation results are consistent with the theoretical values.