A New Adaptive Inductance Circuit for Piezoelectric Energy Harvesting
کد مقاله : 1014-ISAV
نویسندگان:
سالار حاتم *، صابر محمدی، اکرم خدایاری
گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران
چکیده مقاله:
Mechanical vibration energy harvesting using multi-switch circuit with adaptive inductance is a new method based on impedance matching between electrical circuit and mechanical vi-brating system in order to maximize the harvested energy. Considering a vibrating piezoelec-tric element in parallel with a load resistance, the whole converted energy is not dissipated or flowed into the load resistance and a remarkable portion of this energy is stored on the inter-nal capacitor of the piezoelectric. By connecting the vibrating piezoelectric to a special inter-face circuit, approximately the whole stored energy portion on the piezoelectric flows into the circuit. The proposed interface circuit contains a set of inductors in series with electronic switches that controlled by a microcontroller which always provides resonance condition in the designed frequency range. In the proposed technique, for a simulated piezoelectric gen-erator with a constant current source in the design frequency range of 100 to 700 Hz, the harvested power of numerical analysis is 2 to 10 times (depending on frequency) more than standard method (simple resistive circuit).
کلیدواژه ها:
mechanical vibrations; energy harvesting; piezoelectric materials; impedance matching
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