Analysis of MEMS electrostatic energy harvesters electrically configured as voltage multipliers
| Autor: | Binh Duc Truong, Einar Halvorsen, Cuong Phu Le |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
FOS: Physical sciences
Applied Physics (physics.app-ph) Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Electronic circuit simulation law.invention 03 medical and health sciences 0302 clinical medicine Parasitic capacitance Hardware_GENERAL law Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Voltage multiplier Electrical and Electronic Engineering Diode Physics business.industry Electrical engineering 020206 networking & telecommunications Physics - Applied Physics Capacitor visual_art Electronic component visual_art.visual_art_medium business Energy harvesting 030217 neurology & neurosurgery Voltage |
| Zdroj: | AEU - International Journal of Electronics and Communications. 107:125-136 |
| ISSN: | 1434-8411 |
| DOI: | 10.1016/j.aeue.2019.05.006 |
| Popis: | This paper presents the analysis of an efficient alternative interface circuit for MEMS electrostatic energy harvesters. It is entirely composed by diodes and capacitors. Based on modeling and simulation, the anti-phase gap-closing structure is investigated. We find that when configured as a voltage multiplier, it can operate at very low acceleration amplitudes. In addition, the allowed maximum voltage between electrodes is barely limited by the pull-in effect. The parasitic capacitance of the harvester and non-ideal characteristics of electronic components are taken into account. A lumped-model of the harvesting system has been implemented in a circuit simulator. Simulation results show that an output voltage of 22 V is obtained with 0.15 g input acceleration. The minimum necessary ratio between the maximum and minimum capacitances of the generators which allows operation of the circuit, can be lower than 2. This overcomes a crucial obstacle in low-power energy harvesting devices. A comparison between the voltage multiplier against other current topologies is highlighted. An advantage of the former over the latter is to generate much higher saturation voltage, while the minimum required initial bias and the minimum capacitance ratio in both cases are in the similar levels. Comment: 11 pages, IEEE journal article template |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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