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Interleaved Switch Harvesting on Inductor: Non-linear extraction, action and reaction
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0003-1763-8978
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.ORCID iD: 0000-0002-4133-3317
Number of Authors: 32016 (English)In: 2016 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, Piscataway, NJ: IEEE Communications Society, 2016, p. 642-647, article id 7520439Conference paper, Published paper (Refereed)
Abstract [en]

The circuit presented in this paper provides increased transfer efficiency for the electric charge generated by a piezoelectric element to the storage device, it also enables a simplified active control circuitry required for switched harvesting solutions as the control transistors are referenced to ground. This is achieved by inverting the voltage potential across the piezoelectric element and thereby maintaining a higher voltage while extracting energy. The increased potential allows vibration harvesters to operate over a broader frequency range. For weakly coupled piezoelectric harvesters, the increased potential allows the electrical power output to be increased. In this paper, the circuit is simulated in SPICE using existing models of discrete components in conjunction with a model of a piezoelectric vibration harvester. The power output and mechanical behavior of the harvester using the presented circuit are compared to two existing technologies: Synchronous Switch Harvesting on Inductor (SSHI) and a full-wave rectifying bridge. The comparison demonstrates that the novel Interleaved Switch Harvesting on Inductor (ISHI) circuit outperforms state-of-the-art active harvesting solutions, e.g., SSHI, as a result of the decreased energy losses from diodes. In addition, the ISHI circuit requires fewer components than does the SSHI circuit and solves the floating transistor source issue that arises in SSHI implementations. To achieve the maximum power conversion efficiency, impedance matching is required, which can be achieved by controlling the voltage of the storage device

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 2016. p. 642-647, article id 7520439
Series
I E E E Instrumentation and Measurement Technology Conference. Proceedings, ISSN 1091-5281
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-38164DOI: 10.1109/I2MTC.2016.7520439ISI: 000382523600114Scopus ID: 2-s2.0-84980383531Local ID: c7ab804b-e9e4-44c3-b234-cc3445dab6ddISBN: 9781467392204 (electronic)OAI: oai:DiVA.org:ltu-38164DiVA, id: diva2:1011663
Conference
International Instrumentation and Measurement Technology Conference : 23/05/2016 - 26/05/2016
Note

Validerad; 2016; Nivå 1; 2016-10-11 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-07-10Bibliographically approved
In thesis
1. Robust energy management for IoT machine elements
Open this publication in new window or tab >>Robust energy management for IoT machine elements
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Advancements in semiconductor technology have reached the point where ambient energy surrounding their environment can power sensors and microprocessors. It enables new strategies for energy management which is necessary to continue the sensorization of our environment. With the vast amount of and the rate at which the number of interconnected devices is increasing, there is a need to power resource-constrained devices through other means than disposable batteries. Harvesting ambient energy from the vicinity of the device is one solution.

SKF, a producer of rolling element bearings, produces approximately one billion bearings per year. A mechanical part that is essential for rotating machinery and that has the potential to measure and monitor vital parts of the machine. A scenario in which bearings are embedded with electronics to monitor process and health parameters that can be analyzed on site and collected to remote locations is a crucial motivator for this thesis.

This thesis presents some of the most common sources of energy used for harvesting energy in rotating environments and discusses how different transduction methods can convert ambient energy into electrical energy. General solutions that robustly apply to many applications are of great interest. The investigated technologies should apply to a dirty and encapsulated industrial environment; therefore, certain energy sources, for example, sunlight and radio frequencies, are omitted. Vibration harvesters are investigated and modeled in SPICE to verify performance gains using a novel circuit for non-linear power extraction for piezoelectric materials. Simulations showed that a weak coupling from the electrical system to the mechanical system would greatly benefit non-linear extraction techniques. Such a weakly coupled system can be created in a bearing. Mechanical load and rotation generate cyclic strain in the bearings raceway; the cyclic strain can be utilized by applying piezoelectric patches to the raceway to power embedded systems and sensory information from the piezoelectric patch can also be used to monitor the bearing. Finally, trends and limits for computation, communication, data acquisition, and energy storage are investigated to evaluate the most robust energy storage solution for future embedded systems, which are powered by an energy harvester.

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2018
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Keywords
Energy harvesting, Rolling element bearing, Energy Storage
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-69575 (URN)978-91-7790-169-3 (ISBN)978-91-7790-170-9 (ISBN)
Public defence
2018-09-27, D770, University Campus, Porsön, Luleå, 10:00 (English)
Opponent
Supervisors
Available from: 2018-06-18 Created: 2018-06-15 Last updated: 2018-06-18Bibliographically approved

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Häggström, FredrikGustafsson, JonasDelsing, Jerker

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