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Publications (8 of 8) Show all publications
Bjurstrom, J., Kohler, E., Staaf, H., Bjornfot, T., Rusu, C., Kolev, D., . . . Kling, E. G. (2024). Energy harvesting feasibility for safety belt buckle. In: 2024 IEEE Wireless Power Technology Conference and Expo (WPTCE): . Paper presented at 2024 IEEE Wireless Power Technology Conference and Expo (WPTCE) (pp. 409-413). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Energy harvesting feasibility for safety belt buckle
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2024 (English)In: 2024 IEEE Wireless Power Technology Conference and Expo (WPTCE), Institute of Electrical and Electronics Engineers (IEEE) , 2024, p. 409-413Conference paper, Published paper (Refereed)
Abstract [en]

Technology is to an increasing degree becoming spatially distributed, as Internet of Things or sensors in vehicles. With this comes challenges in power supply, with either cumbersome amounts of batteries or power cables. In this paper we examine the potential of energy harvesting for powering a safety sensor on a belt buckle. Concluding that that the vibrations on this site are impractically small, we propose an energy harvester for transducing human induced mechanical energy. The electromagnetic energy harvester converts vertical buckle-in/-out events into rotations of a circular array of magnets, varying the flux through a coil. Both measurements and simulations are performed, the later showing a potential energy of 4mJ for a single buckle-in event. © 2024 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Electromagnetic waves; Potential energy; Vibrations (mechanical); Battery cables; Circular arrays; Electromagnetic harvesters; Energy Harvester; Mechanical energies; Power cables; Power supply; Safety belt; Safety buckle; Transducing; Energy harvesting
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-74730 (URN)10.1109/WPTCE59894.2024.10557335 (DOI)2-s2.0-85197432666 (Scopus ID)979-8-3503-4913-9 (ISBN)
Conference
2024 IEEE Wireless Power Technology Conference and Expo (WPTCE)
Funder
Swedish Foundation for Strategic Research
Note

Funding: Swedish Foundation for Strategic Research and ECSEL JU.

Available from: 2024-08-08 Created: 2024-08-08 Last updated: 2024-08-08Bibliographically approved
Sepehri, S., Staaf, H., Kohler, E., Trabaldo, E., Penttila, M., Ryynanen, L. & Rusu, C. (2024). Gate-folded Triboelectric Energy Harvester for Intelligent Tires. In: Wireless Power Week: . Paper presented at 2024 Wireless Power Technology Conference and Expo (WPTCE) (pp. 467-470). Institute of Electrical and Electronics Engineers (IEEE)
Open this publication in new window or tab >>Gate-folded Triboelectric Energy Harvester for Intelligent Tires
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2024 (English)In: Wireless Power Week, Institute of Electrical and Electronics Engineers (IEEE) , 2024, p. 467-470Conference paper, Published paper (Refereed)
Abstract [en]

We have investigated the integration of a triboelectric energy harvester in a tire to provide electrical energy for smart tires. The harvester is made of cost-effective, off-the-shelf materials and is comprehensively characterized in lab environment. Further assessments are conducted within tire test machines, evaluating the harvester’s performance under varying driving conditions. The results points out the potential of this technology in harnessing energy from the tire motion. This energy can be used to power sensor networks, marking a significant step toward sustainable and battery free intelligent tires. 

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2024
Keywords
Energy harvesting; Sensor networks; Tires; Triboelectricity; Cost effective; Electrical energy; Energy; Energy Harvester; Intelligent tires; Performance; Smart tires; Test machine; Tire test; Triboelectric effect; Cost effectiveness
National Category
Energy Engineering
Identifiers
urn:nbn:se:ri:diva-74733 (URN)10.1109/WPTCE59894.2024.10557381 (DOI)2-s2.0-85197429865 (Scopus ID)
Conference
2024 Wireless Power Technology Conference and Expo (WPTCE)
Note

This work has received funding from ECSEL JU-2020-1- IA grant 'Energy ECS - Smart and secure energy solutions for future mobility' (grant agreement No 101007247).

Available from: 2024-08-06 Created: 2024-08-06 Last updated: 2024-08-08Bibliographically approved
Staaf, H., Matsson, S., Sepehri, S., Köhler, E., Daoud, K., Ahrentorp, F., . . . Rusu, C. (2024). Simulated and measured piezoelectric energy harvesting of dynamic load in tires. Heliyon, 10(7), Article ID e29043.
Open this publication in new window or tab >>Simulated and measured piezoelectric energy harvesting of dynamic load in tires
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2024 (English)In: Heliyon, E-ISSN 2405-8440, Vol. 10, no 7, article id e29043Article in journal (Refereed) Published
Abstract [en]

From 2007 in US and from 2022 in EU it is mandatory to use TPMS monitoring in new cars. Sensors mounted in tires require a continuous power supply, which currently only is from batteries. Piezoelectric energy harvesting is a promising technology to harvest energy from tire movement and deformation to prolong usage of batteries and even avoid them inside tires. This study presents a simpler method to simultaneous model the tire deformation and piezoelectric harvester performance by using a new simulation approach - dynamic bending zone. For this, angular and initial velocities were used for rolling motion, while angled polarization was introduced in the model for the piezoelectric material to generate correct voltage from tire deformation. We combined this numerical simulation in COMSOL Multiphysics with real-life measurements of electrical output of a piezoelectric energy harvester that was mounted onto a tire. This modelling approach allowed for 10 times decrease in simulation time as well as simpler investigation of systems parameters influencing the output power. By using experimental data, the simulation could be fine-tuned for material properties and for easier extrapolation of tire deformation with output harvested energy from simulations done at low velocity to the high velocity experimental data.

Place, publisher, year, edition, pages
Elsevier Ltd, 2024
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:ri:diva-72824 (URN)10.1016/j.heliyon.2024.e29043 (DOI)2-s2.0-85189816504 (Scopus ID)
Note

This work has received funding from ECSEL JU-2020-1-IA grant ‘Energy ECS - Smart and secure energy solutions for future mobility’ (grant agreement No 101007247).

Available from: 2024-05-14 Created: 2024-05-14 Last updated: 2024-08-14Bibliographically approved
Romani, A., Rusu, C., Staaf, H. & Avetisova, K. (2023). The ENERGY ECS Project: Smart and Secure Energy Solutions for Future Mobility. In: 2023 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE): . Paper presented at 2023 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE). IEEE
Open this publication in new window or tab >>The ENERGY ECS Project: Smart and Secure Energy Solutions for Future Mobility
2023 (English)In: 2023 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE), IEEE , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Electric and smart mobility are key enablers for their green energy transition. However, the electrification of vehicles poses several challenges, from the development of power components to the organization of the electric grid system. Moreover, it is expected that the smartification of mobility via sensors and novel transport paradigms will play an essential role in the reduction of the consumed energy. In response to these challenges and expectations, the ENERGY ECS project is pursuing smart and secure energy solutions for the mobility of the future, by developing power components, battery charging electronics, and self-powered sensors for condition monitoring, along with advanced techniques for grid management, applications of artificial intelligence, machine learning and immersing technologies. This paper presents the project’s objectives and reports intermediate results from the perspective of the targeted use cases.

Place, publisher, year, edition, pages
IEEE, 2023
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-67037 (URN)10.23919/aeitautomotive58986.2023.10217190 (DOI)2-s2.0-85170641746 (Scopus ID)
Conference
2023 AEIT International Conference on Electrical and Electronic Technologies for Automotive (AEIT AUTOMOTIVE)
Note

This project has received funding from the ECSEL Joint Undertaking (JU) under grant agreement no. 101007247. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and Finland, Germany, Ireland, Sweden, Italy, Austria, Iceland, Switzerland.

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2023-09-28Bibliographically approved
Staaf, H., Sawatdee, A., Rusu, C., Nilsson, D., Schäffner, P. & Johansson, C. (2022). High magnetoelectric coupling of Metglas and P(VDF-TrFE) laminates. Scientific Reports, 12(1), Article ID 5233.
Open this publication in new window or tab >>High magnetoelectric coupling of Metglas and P(VDF-TrFE) laminates
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2022 (English)In: Scientific Reports, Vol. 12, no 1, article id 5233Article in journal (Refereed) Published
Abstract [en]

Magnetoelectric (magnetic/piezoelectric) heterostructures bring new functionalities to develop novel transducer devices such as (wireless) sensors or energy harvesters and thus have been attracting research interest in the last years. We have studied the magnetoelectric coupling between Metglas films (2826 MB) and poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) in a laminate structure. The metallic Metglas film itself served as bottom electrode and as top electrode we used an electrically conductive polymer, poly(3,4-ethylene-dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). Besides a direct electrical wiring via a graphite ink, a novel contactless readout method is presented using a capacitive coupling between the PEDOT:PSS layer and an electrode not in contact with the PEDOT:PSS layer. From the experimental result we determined a magnetoelectric coupling of 1445 V/(cm·Oe) at the magnetoelastic resonance of the structure, which is among the highest reported values for laminate structures of a magnetostrictive and a piezoelectric polymer layer. With the noncontact readout method, a magnetoelectric coupling of about 950 V/(cm·Oe) could be achieved, which surpasses previously reported values for the case of direct sample contacting. 2D laser Doppler vibrometer measurements in combination with FE simulations were applied to reveal the complex vibration pattern resulting in the strong resonant response.

National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:ri:diva-58961 (URN)10.1038/s41598-022-09171-3 (DOI)
Available from: 2022-03-29 Created: 2022-03-29 Last updated: 2024-03-03Bibliographically approved
Pamfil, B., Palm, R., Vyas, A., Staaf, H., Rusu, C. & Folkow, P. D. (2021). Multi-Objective Design Optimization of Fractal-based Piezoelectric Energy Harvester. In: 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS): . Paper presented at 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS (pp. 96-99).
Open this publication in new window or tab >>Multi-Objective Design Optimization of Fractal-based Piezoelectric Energy Harvester
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2021 (English)In: 2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), 2021, p. 96-99Conference paper, Published paper (Refereed)
Abstract [en]

This paper studies optimization solutions for a proof-of-concept design methodology for a fractal-based tree energy harvester with a stress distribution optimized structure. The focus is on obtaining a sufficiently high-power output and a high enough stress in the longitudinal branch direction by using Frequency Response Functions. The design methodology shows that using the MATLAB code with Sensitivity Analysis and Multi-objective Optimization in combination with elitist genetic algorithm enables an optimal design.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:ri:diva-68583 (URN)10.1109/PowerMEMS54003.2021.9658390 (DOI)
Conference
2021 IEEE 20th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS
Available from: 2023-12-13 Created: 2023-12-13 Last updated: 2023-12-13Bibliographically approved
Vyas, A., Staaf, H., Rusu, C., Ebefors, T., Liljeholm, J., Smith, A., . . . Enoksson, P. (2018). A micromachined coupled-cantilever for piezoelectric energy harvesters. Micromachines, 9(5), Article ID 252.
Open this publication in new window or tab >>A micromachined coupled-cantilever for piezoelectric energy harvesters
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2018 (English)In: Micromachines, E-ISSN 2072-666X, Vol. 9, no 5, article id 252Article in journal (Refereed) Published
Abstract [en]

This paper presents a demonstration of the feasibility of fabricating micro-cantilever harvesters with extended stress distribution and enhanced bandwidth by exploiting an M-shaped two-degrees-of-freedom design. The measured mechanical response of the fabricated device displays the predicted dual resonance peak behavior with the fundamental peak at the intended frequency. This design has the features of high energy conversion efficiency in a miniaturized environment where the available vibrational energy varies in frequency. It makes such a design suitable for future large volume production of integrated self powered sensors nodes for the Internet-of-Things

Place, publisher, year, edition, pages
MDPI AG, 2018
Keywords
Bandwidth broadening, Coupled cantilevers, Enhanced stress distribution, Finite element modeling, Lead zirconate titanate, Microelectromechanical systems (MEMS), Piezoelectric micro-energy harvester, Bandwidth, Conversion efficiency, Degrees of freedom (mechanics), Display devices, Electromechanical devices, Energy harvesting, Finite element method, MEMS, Piezoelectricity, Stress concentration, High energy conversions, Micro electromechanical system (MEMS), Micro energy, Piezoelectric energy harvesters, Two degrees of freedom, Vibrational energies, Nanocantilevers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-40182 (URN)10.3390/mi9050252 (DOI)2-s2.0-85060995701 (Scopus ID)
Available from: 2019-10-02 Created: 2019-10-02 Last updated: 2024-01-17Bibliographically approved
Trabaldo, E., Köhler, E., Staaf, H., Enoksson, P. & Rusu, C. (2014). Simulation of a novel bridge MEMS-PZT energy harvester for tire pressure system. In: Journal of Physics: Conference Series. Paper presented at 14th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications, PowerMEMS 2014, 18 November 2014 through 21 November 2014. , 557(1), Article ID 012041.
Open this publication in new window or tab >>Simulation of a novel bridge MEMS-PZT energy harvester for tire pressure system
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2014 (English)In: Journal of Physics: Conference Series, 2014, Vol. 557, no 1, article id 012041Conference paper, Published paper (Refereed)
Abstract [en]

Self-powering is becoming an important issue for autonomous sensor systems. By having an on-the-go power source the life span increases in comparison to a limited battery source. In this paper, simulation of an innovative design for a piezoelectric energy harvester for Tire Pressure Measurement System (TPMS) is presented. The MEMS-based thin-film PZT harvester structure is in the form of a bridge with a big central seismic mass and multiple electrodes. This design takes the advantage of the S-profile bending and a short beam length to concentrate the piezoelectric effect in a small segment along the beam and maximize the power output for a given displacement. From simulation in Comsol Multiphysics, the 9mm × 5mm bridge, seismic mass of 8.7mg and resonance frequency of 615Hz, generates 1 μW by mechanical pulses excitation equivalent to driving at 60 km/h (roughly 180G).

Keywords
Energy harvesting, Nanotechnology, Piezoelectricity, Seismology, Autonomous sensors, Comsol multiphysics, Energy Harvester, Innovative design, Multiple electrodes, Piezoelectric energy harvesters, Pulses excitation, Resonance frequencies, Energy conversion
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-35495 (URN)10.1088/1742-6596/557/1/012041 (DOI)2-s2.0-84915747730 (Scopus ID)
Conference
14th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications, PowerMEMS 2014, 18 November 2014 through 21 November 2014
Available from: 2018-11-14 Created: 2018-11-14 Last updated: 2023-03-27Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2063-2908

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