Abstract
This paper presented a concept of single degree of freedom (SDOF) electromagnetic vibration energy harvester device. This technique enable system to operate at wideband frequency range, low frequency and has multi-resonance frequencies. Each mechanical system operates at difference frequency where each system is attached with electromagnetic transducer components. the device is developed based on the parameter factors of vibration transmissibility from external vibration sources into the device through mathematical modelling. A prototype was tested by using vibration exciter and normal human walking. the fabricated device had showed multi-resonant behavior at 4.26 and 8.34 Hz during test. From experiment results, they have showed capability to operate at wide bandwidth frequency from 1.9 until 18.5 Hz at a periodic excitation of 0.04 g. the highest amount of rms voltage that has been produced about 108 mV with a maximum 78 µW average power across the 150 Ω load resistance. So, it has proven the dual-moving mechanical concept with low damping value in system has increased the operating bandwidth frequency and also increased the amount of output voltage from device.
Highlights
Scavenging energy from mechanical vibration become the most study for harvesting research area due to its high availability in technical environments[1]
Mechanical mechanism system is more on physical design which involved the motional design [3] and a transducer is device that converts mechanical motion into electrical energy [4]
We developed electromagnetic vibrational energy harvester to improve the performance of the linear harvester based on the parametric factor involved in mechanical design in order to operate the system at time-varying frequency
Summary
Scavenging energy from mechanical vibration become the most study for harvesting research area due to its high availability in technical environments[1]. The transducer type commonly used in vibration energy harvesting is electromagnetic[2][5]. The capability of system to operate at wideband frequency depends on the mechanical design of system itself. In order to increase the system efficiency, many researchers are focusing on developing system with capability to operate under wideband frequency condition and had caused the varieties in design of system has been introduced [6][7][8]. We developed electromagnetic vibrational energy harvester to improve the performance of the linear harvester based on the parametric factor involved in mechanical design in order to operate the system at time-varying frequency
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