轨道振动能量回收接口电路的优化设计

Optimization Design of Interface Circuit in Energy Harvesting for Track Vibration

轨道车辆在行驶过程中引起钢轨的振动,为了高效的回收并存储轨道振动能量,提出一种新型双开关电荷提取(Double Switch Charge Extraction,DSCE)接口电路。首先建立机电耦合模型,通过压电效应将机械能转化成电能;然后对接口电路建模;最后通过Multisim软件建立整个振动能量回收系统的仿真模型。仿真得出DSCE电路在振幅恒定的情况,不同负载下的回收功率,并与Standard接口电路以及SECE接口电路的回收功率进行分析比较,仿真结果表明DSCE电路在恒定振幅情况下,其回收功率大小不受负载电阻变化的影响,且高于对比的两种电路。结果表明该电路性能优越,能够更高效回收轨道振动能量。

Track vibration is caused by track irregularity. A new type of double switch charge extraction interface circuit so called Double Switch Charge Extraction （DSCE） for track vibration energy harvesting system is presented in the paper. First, the model of Electro-Mechanical coupling system was modeled; and then the interface circuit model was established Finally, the simulation model of vibration energy harvesting system is modeled with Muhisim soft- ware. Based on simulation, the power of DSCE circuit was calculated in constant displacement amplitude and differ- ent load, and then compared with Standard circuit and SECE circuit. The results show that the harvested power of DSCE is independent of its load resistance value, and much higher than other two circuits. The above shows the supe- rior performance of DSCE circuit and effeciency in energy harvesting for track vibration.