Design and simulation of a low-frequency microelectromagnetic harvester for butterfly massagers

Electrodynamic vibration energy harvesters use mechanisms that convert external environmental vibrations into relative motions between magnets and electrical conductors. The energy conversion is based on the change in magnetic flux in a coil. Intentionally, the internal motions induce an electric potential (voltage) in the form of an electromotive force (emf) in the conductors of the coil. This phenomenon is known in the research literature as Faraday's law of induction. As soon as the conductors are connected to an external load, electric charge flows and energy is supplied by the harvester. This flow leads to the excitation of a mechanical reaction force, which is described by the Lorentz force acting on the current-carrying wire. In principle, electrodynamic transmission can provide tremendous flexibility for the design of a vibration energy harvester. Several architectures, based on resonant or non-resonant methods, allow for time-dependent changes in the magnetic flux within a coil. This allows for the design of structures of various sizes, shapes, and factors to provide sufficient voltage to power low-voltage, low-power butterfly massagers.

کلیدواژه ها:

electrodynamic vibration energy ، low-frequency ، electric potential ، coil