반발형 자석쌍 전자기유도를 이용한 진동에너지 자가발전모듈 해석

초록

When trains travel, energy loss occurs in various forms such as vibration, heat and train-induced wind. When a heavy railway vehicle runs at high speed, the energy loss can not be ignored. Therefore, if it is retrieved efficiently, it can be used as a power source of a low-power sensor node. In this study, we investigated the electromagnetic vibration energy harvester to convert the vibration energy generated from the axle bearing of the railway vehicle bogie. Electric energy is generated from the relative motion of the magnets and the coil winding caused by the vibration. To increase the amount of power generation, a repulsive magnet pair is used and the amount of power generation according to various design conditions is predicted. The prediction is based on a mathematical model of power generation and finite element magnetostatic analysis on the magnetic field by the magnet pair. It turns out that the back yoke of the magnets and the position of the coil are very important to increase power generation.