Abstract
This paper deals with the simulation of planar spring as one of the components of the Electrodynamics Vibration Energy Harvesting (EVEH) devices. This EVEH device is composed of symmetric double spring planar, magnets and coils. Spring planar with four cantilever arms were made of polyimide material. The cantilever’s arm was designed with four type of planar spring. They have different dimension and number of magnet to be attach in the device. The dimension was 15x15 mm2 and 25x25 mm2 with one and two magnets, respectively. Planar spring was then simulated using Finite Element Analysis software (FEA) Comsol Multiphysics 4.3 for studying resonance frequency of the device. The resonance frequency was achieved 56 Hz with one magnet, and 40 Hz with two magnets at 25x25 mm2 planar spring size, while for planar spring with dimension 15x15 mm2 around 103 Hz with one magnet, and 74 Hz with two magnets. The results show, that design of 25x25 mm2 was obtained the smaller resonance frequency than of 15x15 mm2. The usage of one magnet shown higher resonance frequency than two magnets.
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