Energy harvester using ferrofluid

The energy harvesting device using a magnetic fluid, according to one embodiment is disclosed, and more particularly to an energy harvesting device using a magnetic fluid that can increase the efficiency of energy production by using a lubricant reduces the frictional forces is disclosed. Energy according to one embodiment of harvesting apparatus comprising a housing, a magnet portion placed in the housing having an inner space, which is provided on the outside of the housing to generate power by the magnetic force change the magnet portion harvesting unit and magnet may include a lubricant which reduces the friction between the part and the housing, it is possible to generate additional power harvesting unit according to the moving magnet due to external vibration. The lubrication portion can include a magnetic fluid (ferro-fluid). The magnetic fluid may be reduced to increase the efficiency of energy generation of the friction coefficient between the housing and the magnet unit.