New micro electromagnetic vibration energy harvester

作者：Lan Lan^*; He Qing; Zhao Xiaotong; Song Bo

来源：Journal of Central South University(Science and Technology), 2013, 44(SUPPL.1): 436-442.

• Collection system modeling
• Electromagnetic
• Electromagnetic vibrations
• Energy conversion systems
• Relative displacement
• Resonance frequencies
• Vibration characteristics
• Vibration energy harvesters

A new kind of micro electromagnetic vibration energy harvester of flat spring was proposed. The energy harvester includes static coil and vibration picking system with magnets, mass and spring. Theoretical analysis results show that vibration energy can be collected easily when work frequency is resonance frequency and relative displacement is the largest. In order to get the optimum energy harvester, finite element method was used to build collection system model. The relationship among vibration characteristic and thickness of spring, width of elastic beam and length of elastic beam is gotten through finite element analysis. The finite element analysis was used to build energy conversion system. The relationships among peak output voltage and turns of coil, length, width and height of magnet, distance, amplitude and frequency are obtained. When the size of model is determined and resonant frequency is 45.4Hz, the maximum output voltage is 205 mV.

• 出版日期2013
• 单位华北电力大学