Efficiency Evaluation of a MOSFET bridge rectifier for Powering LEDs using Piezo-electric Energy Harvesting Systems

Abstract

Original scientific paperHarvesting energy from the renewable energy sources plays a very important role in recent days. Researchers are using various methods to capture the energy for different sources. One of the most prominent methods of energy harvesting from vibrations is by using piezo-electric material. Piezo-electric vibration harvesting is smart mainly due to the simplicity of piezoelectric transduction and the piezoelectric systems can be easily implemented into a wide variety of applications. Due to wide range of AC output voltage and low power, the piezo-electric generator cannot directly prop up the AC or DC electrical appliances. Hence in the majority applications the AC signal created by this generator needs to be rectified. In this paper a new highly efficient MOSFET full bridge AC to DC converter for piezoelectric energy harvesting is planned, which enhances the power extracted from the piezo-electric crystal. The proposed AC to DC converter reduces the voltage drop along the conduction path and thereby increases the power extraction and conversion capability. The proposed circuit is replicated in PSpice software package and then in the experimental setup. The performance is evaluated and compared.Key words: LED lighting, Piezoelectric vibration energy harvesting, Power converter, Renewable energy Procjena učinkovitosti mosnog MOSFET ispravljača za napajanje LED rasvjete korištenjem piezoelektričkog sustava za prikupljanje energije. Prikupljanje energije iz obnovljivih izvora odigralo je važnu ulogu u recentnoj povijesti. Istraživači danas koriste različite metode za prikupljanje različitih oblika energije. Jedna je od najistaknutijih metoda prikupljanje energije vibracijama korištenjem piezoelektričkih materijala. Ovaj način ističe se jednostavnošću piezoelektrične vodljivosti, a sustavi se mogu jednostavno implementirati u široki opseg primjena. Zbog širokog raspona AC izlaznog napona i male snage, piezoelektrički generator ne može se direktno spojiti na AC ili DC električne ure aje. Stoga je za većinu aplikacija AC signal ovakvog generatora potrebno ispraviti. U radu se prikazuje planiranje nove visoko-efikasne topologije punog mosnog spoja MOSFET-a AC/DC pretvarača za piezoelektričko prikupljanje energije, koje pojačava prikupljenu energiju iz piezoelektričnog kristala. Predloženi AC/DC pretvarač smanjuje propad napona duž puta vo enja i time povećava prikupljanje energije i sposobnost konverzije. Predloženi sklop izra en je u PSpice programskom paketu, a zatim na eksperimentalnom postavu. Svojstva sklopa procijenjena su i uspore ena.Ključne riječi: LED rasvjeta, piezoelektričko vibracijsko prikupljanje energije, pretvarač snage, obnovljivi izvori

A Self-Powered VDJT AC–DC Conversion Circuit for Piezoelectric Energy Harvesting Systems

“…depicts a flow chart of both single and dual-stage circuits. The easiest approach to converting AC to DC is with a single-stage H-Bridge rectifier (HBR) circuit [11,[18][19][20] to address the forward voltage, V f issues of conventional diodes in the FBR circuit. Nonetheless, the HBR circuit's outcome, in terms of output voltage and power, was limited, and the design parameters were not appropriately defined.…”

“…The output voltage of the proposed circuit at both frequencies 2 and 5 Hz is shown in Figure 13. Even though the applied input voltage was set to 5 V ac, the higher output voltage was a ained at a high frequency [18]. The governing factors for the higher output through VDJT, when the frequency was higher, are as follows [41][42][43][44]:…”