Design of electromagnetic vibratory energy harvester with T-type beam for power grid equipment
Due to vibration energy exists widely in power grid equipment,during the process of monitoring the operating state of the equipment,the vibratory energy harvester can convert vibration energy into the effective power supply of its monitoring device,which can extend the running time of the device.For the energy harvester studied in this paper,it is based on a rigid-flexible bonding structure,and the vibration picking part adopts a polyimide T-beam and an FR4 vibration plane coil.Among them,the rigid-flexible bonding structure enable the energy harvester to be mass-produced based on standard industrial processes,the T-type beam design can effectively reduce the residual stress of the processing process,and the flexible beam enables it to achieve high amplitude and energy harvesting efficiency at low ambient vibration.After testing the collector,the T-type beam device has a natural frequency of 140 Hz,an output voltage of 9.40 mV at±1 g acceleration,and an output power of 4.71 μW with an external matching resistor of 2.31 Ω.Therefore,the natural frequency of the device is located in the frequency range of the vibration frequency of the power system equipment and provides a certain output voltage and power,so that the vibration energy of the power equipment can be effectively collected and the vibration characteristics of the equipment can be monitored.
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