Development of a Suspension Energy Harvester Utilizing a Mechanical Resonator

Current suspension systems excel in optimizing tire-road contact, enhancing dynamic stability, and improving passenger comfort. However, these advantages come at the cost of dissipating energy through dampers to mitigate unwanted vibrations. Quarter car simulations indicate that modern passenger vehicles dissipate approximately 200 watts of power per damper while travelling at 13.4 m/s on uneven roads. This research addresses this energy loss by developing a prototype that exploits mechanical resonance modes on the lower control arm (LCA) to amplify vibrational energy. A resonator, designed as a tuned massspring system (M and K system), is proposed to boost output velocity and displacement under typical road conditions through mechanical resonance. To maximize the voltage output of the generator, careful selection and placement of magnets and coils in the energy harvester are crucial. The design incorporates four radial Neodymium magnets with rare earth metal properties and ideal pole orientation, enhancing power generation efficiency. Experimental measurements conducted within the input frequency range of 11–18 Hz demonstrate the ability to produce voltages ranging from 8 to 10 V, suitable for charging purposes.