mechanicalvibrationsenergyharvestingandpowermanagement-外文文獻(xiàn)-資料下載頁(yè)
2025-05-11 12:56本頁(yè)面
【正文】 battery to the loads ( for example) trough a second DCDC converter and a LDO regulator? In this case with a 500181。w power consumption of the load, the total efficiency is no more than 30%.... On solution is to manage the power path and to go directly from the source (1V) to the loads () trough the LDO regulator. The total efficiency is growing up to 70%! This solutions implies to design very challenging functions with ultra low power techniques (in range of tens of nW): harvested power level monitoring, battery SoC monitoring and charger, load power consumption monitoring, integrated DCDC converters and LDO regulators. Dynamic power management would optimize energy extraction, thanks power path reconfiguration and low power environment aware algorithm. Asynchronous solutions for ADC and ultra low power digital dedicated circuits seem to be the good way. V. CONCLUSION In this paper we presented different realizations. We started with a macroscopic structure having a 100g of tungsten moving mass (see Figure 1). This structure was made with rectangular fingers, but we showed that the capacitance density can be increased by using triangles fingers (see Figure 3). Furthermore, with this type of structure, it is easy to adjust the gap by adjusting the fingers overlap (see Figure 4). In order to maximize the capacitance variation and then the efficiency, it is interesting to have the relative displacement amplitude close to the gap value. To approach that, we introduced a geometrical nonlinearity in the beams used as springs and guidance between the mass and the support. This nonlinearity gives to the beams the property to be very flexible for low relative displacement amplitude and to be very hard for high relative displacement amplitude with the consequences to amplify the low amplitude input vibrations, to limit the high relative displacements and to enlarge the band of frequency where the resonance is active (see Figure 5). Finally we can use a piezoelectric beam to generate the starting charge, the maximum beam constraint corresponding to the maximum capacitance value. Concerning the power management, we presented our approach that consist to manage each source independently with the objective to continuously extract the maximum of the available energy and store it in an energetic buffer able to adapt the production to the consumption. REFERENCES [1] G. Despesse, T. Jager, . Chaillout, . L233。ger, A. Vassilev, S. Basrour and B. Charlot, “Fabrication And Characterization Of High Damping Electrostatic Micro Devices For Vibration Energy Scavenging”, DTIP 2020, Montreux, Switzerland, ISBN:28481303571, Session 11, Page 386390. [2] G. Despesse, T. Jager, JJ. Chaillout, “Method And Device For Converting Mechanical Energy Into Electrical Energy”, Patent WO202020289A1 [3] G. Despesse, Thomas Jager, JeanJacques Chaillout and Andrea Vassilev, “Mechanical energy recovery apparatus with variable stiffness”, Patent EP1739813A1 [4] Stocker “Compact integrated transconductance amplifier circuit for temporal differentiation”, Circuits and Systems, 2020. ISCAS 39。03. Proceedings of the 2020 International Symposium on Volume 1, 2528 May 2020 Page(s):I201 I204 . [5] Gyudong Kim, MinKyu Kim, ByoungSoo Chang, Wonchan Kim, “A lowvoltage, lowpower CMOS delay element”, SolidState Circuits, IEEE Journal, Vol 31, Issue 7, 07/1996 Page(s):966 – 971. 32Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on January 13, 2020 at 05:55 from IEEE Xplore. Restrictions apply.
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1