Resumen
A concept of a non-linear electromagnetic energy harvesting (EH) system with a rotational pendulum was proposed. In the system, non-linearity was introduced through the interaction of additional stationary magnets placed into coils with a tip magnet on the pendulum by creating double potential well. In the system, both oscillations and rotations are possible depending on the system parameters including the strength of magnets, the excitation conditions including amplitude and frequency, and the initial conditions. Moreover, a housing for an EH prototype was made in a 3D printing technique in order to avoid undesirable electromagnetic coupling. Data obtained from a finite element method (FEM) model, real data, and data from an experiment were applied to reflect the system?s operation. The proposed EH device can be used in applications, where a kinematic longitude excitation with fairly small frequency is available.