Abstract
The modeling and optimization of a direct-drive contactless tubular linear generator are investigated to ensure a highly reliable device with long lifetime for vibration energy harvesting application. A slotless structure is considered to minimize force ripples and simplify the later control. A semi-analytical model based on harmonic Fourier modeling is considered for the calculation of the magnetic field generated by the permanent magnets. Electrical and thermal iterative models are coupled with the magnetic Fourier model into a general optimization tool that is fast and accurate, which is validated by means of a finite element model.
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