National Repository of Grey Literature 12 records found  previous11 - 12  jump to record: Search took 0.00 seconds. 
Design of Vibration Energy Harvester with Using of Non-linear Characteristics
Rubeš, Ondřej ; Ondrůšek, Čestmír (referee) ; Hadaš, Zdeněk (advisor)
This thesis is focused on design of piezoelectric energy harvester with additional nonlinear stiffness. Linear generator has very narrow resonance frequency bandwidth. It makes the resonance mechanism very sensitive to tuning up of the resonance frequency and it can be tuned only for one narrow vibration peak. The main idea for using of the vibration energy harvester with nonlinear stiffness is to make resonance frequency bandwidth wider, so the generator will be useable for more excitation frequencies. In this thesis is used generator Midé V21BL and additional nonlinear stiffness is realized with permanent magnets.
Proposal of piezo-generator inside button
Kučera, David ; Houška, Pavel (referee) ; Hadaš, Zdeněk (advisor)
This bachelor’s thesis deals with proposal of piezo-generator inside button. There are described types of piezo-generators, explained piezoelectric effect, types of piezoelectric material with focus on piezoceramics. The properties of piezoelectric ceramics are described. Proposal of piezo-generator inside button is described at the end of this thesis.

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