| A New Adaptive Capacitance Circuit for Piezoelectric Energy Harvesting |
| کد مقاله : 1013-ISAV |
| نویسندگان |
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سالار حاتم *، صابر محمدی، اکرم خدایاری گروه مهندسی مکانیک، دانشکده فنی مهندسی، دانشگاه رازی، کرمانشاه، ایران |
| چکیده مقاله |
| Vibration energy harvesting using piezoelectric materials is developed significantly in recent years. In this method, the mechanical energy of a vibrating structure is converted to electrical energy using attached piezoelectric patches. Piezoelectric materials do not release the whole converted energy because of their inherent capacitor behaviour. So, a remarkable portion of the converted electrical energy is stored and rested on the piezoelectric capacitor. In the recent years, many researchers are trying to extract this portion using different harvesting circuits. In this paper a new harvesting circuit with adaptive capacitor is proposed that in which approximately the whole converted energy can be extracted. In this method, electrical resonance condition is kept always in the circuit (harvesting circuit and the internal capacitor of piezoelectric element) for all vibration frequencies by choosing the desired adaptive capacitor in the circuit. By this way, the stored portion of the converted electrical energy flows into the circuit and can be extracted. Numerical results show a significant increase in the harvested energy compared with other techniques. |
| کلیدواژه ها |
| mechanical vibrations; energy harvesting; piezoelectric materials; impedance matching |
| وضعیت: پذیرفته شده برای ارائه شفاهی |