Abstract
A dimensionless analysis of piezoelectric vibration energy harvester was conducted in the previous work where the harvested power and energy harvesting efficiency were normalised and determined from two non-dimensional variables of resistance and force factor. This paper has developed a dimensionless analysis of an electromagnetic vibration energy harvester where the harvested power and energy harvesting efficiency are normalised and determined from two similar non-dimensional variables of resistance and equivalent force factor. The harvested power and efficiency are compared for the electromagnetic harvester with different interface circuits. The aim is to disclose some similarity and limitations of the piezoelectric and electromagnetic harvesters in a dimensionless scale.
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