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2018 | Buch

Introduction Kapitel lesen Erstes Kapitel lesen

Energy Harvesting for Self-Powered Wearable Devices

verfasst von: Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail

Verlag: Springer International Publishing

Buchreihe : Analog Circuits and Signal Processing

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

This book discusses the design and implementation of energy harvesting systems targeting wearable devices. The authors describe in detail the different energy harvesting sources that can be utilized for powering low-power devices in general, focusing on the best candidates for wearable applications. Coverage also includes state-of-the-art interface circuits, which can be used to accept energy from harvesters and deliver it to a device in the most efficient way. Finally, the authors present power management circuits for using multiple energy harvesting sources at the same time to power devices and to enhance efficiency of the system.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Introduction
Abstract
In this chapter, the IoT trend is discussed and how it changed the wheel of research in many fields. Then, it explores the need for energy harvesting in IoT and wearable electronics to achieve autonomous operation. In addition, a comparison between using batteries and capacitors is carried out to power wearable applications. Finally, state-of-the-art low power devices that use energy harvesting are explained.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Chapter 2. Energy Harvesting Sources, Models, and Circuits
Abstract
In this chapter, common energy harvesting sources are discussed, namely thermoelectric generators, piezoelectric harvester, RF harvesting, and solar. The operating principle of each energy source is explained in detail, along with the electrical model for each which is essential for designing the interface circuits. Further, different power conversion circuits are presented that are commonly used in energy harvesting application. This includes linear drop out regulator, switch capacitor circuits, and inductor-based converters.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Chapter 3. Interface Circuits for Thermoelectric Generator
Abstract
In this chapter, recent work is presented on different interface circuits for TEG energy harvesting systems. Further, the inductor-based boost converter is introduced as the main interface circuit for TEG harvesting systems. After that, different digital control circuits are explored for inductor-based boost converter. This includes zero current control, TEG polarity circuits, maximum power point tracking methods, and startup circuits.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Chapter 4. Zero Crossing Switching Control for L-Based DC–DC Converters
Abstract
In this chapter, ZCS control techniques for inductor-based boost converters are presented. The ZCS circuit controls the high side switch of the synchronous inductor converter to maintain the output voltage and hence the efficiency. In the first section, several reported ZCS techniques are explained and compared in regard to design, complexity, and efficiency. Then, an example of an efficient ZCS method is introduced which is designed to enhance the dynamics of the inductor converter as well as the efficiency. Measurement results are presented which confirm the operation of the ZCS circuit.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Chapter 5. Polarity Mechanism for Thermoelectric Harvester
Abstract
In this chapter, polarity circuits for thermoelectric generator are demonstrated. These circuits are important since it monitors the polarity status of the TEG voltage and flips it when a negative voltage is encountered. Several auto-polarity circuits are reported in the literature which are explained and compared. A novel technique is proposed and supported by measurement results. This technique is simple yet effective, fully integrated on chip, all digital with low overhead.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Chapter 6. Energy Combiner and Power Manager for Multi-Source Energy Harvesting
Abstract
In this chapter, recent work in multi-source energy harvesting system is compared. This includes different energy combining techniques used to deliver the energy from multiple energy harvesting sources to the load. In addition, the design of an efficient energy combiner is proposed with power manager to form a complete energy harvesting system. Furthermore, a sleep mode operation for low power processor is explained which is necessary when the input energy is variable.
Mohammad Alhawari, Baker Mohammad, Hani Saleh, Mohammed Ismail
Backmatter
Metadaten
Titel
Energy Harvesting for Self-Powered Wearable Devices
verfasst von
Mohammad Alhawari
Baker Mohammad
Hani Saleh
Mohammed Ismail
Copyright-Jahr
2018
Electronic ISBN
978-3-319-62578-2
Print ISBN
978-3-319-62577-5
DOI
https://doi.org/10.1007/978-3-319-62578-2

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