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2018 | Buch

Introduction of Wireless Power Transfer Kapitel lesen Erstes Kapitel lesen

CMOS Integrated Circuit Design for Wireless Power Transfer

verfasst von: Yan Lu, Wing-Hung Ki

Verlag: Springer Singapore

Buchreihe : Analog Circuits and Signal Processing

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

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SUCHEN

Über dieses Buch

This book presents state-of-the-art analog and power management IC design techniques for various wireless power transfer (WPT) systems. To create elaborate power management solutions, circuit designers require an in-depth understanding of the characteristics of each converter and regulator in the power chain. This book addresses WPT design issues at both system- and circuit-level, and serves as a handbook offering design insights for research students and engineers in the integrated power electronics area.

Inhaltsverzeichnis

Frontmatter
Chapter 1. Introduction of Wireless Power Transfer
Abstract
Wireless power transfer (WPT) for a broad range of applications is projected to have an exponential growth, with an enormous number of new devices and products to be enabled by this powerful technology. In this chapter, the background and motivations of WPT are introduced first. Then high-level considerations on WPT such as operation frequencies, WPT regulations and WPT standards are reviewed and summarized. In addition, design perspectives on the WPT circuits and systems are also examined. Finally, we present the organization of this book and provide some reading guidelines.
Yan Lu, Wing-Hung Ki
Chapter 2. Wireless Power Transfer Systems
Abstract
This chapter discusses wireless power transfer (WPT) at the system level, with detailed analyses on state-of-the-art WPT output voltage regulation topologies. Possible combinations of the WPT building block configurations are investigated, compared and summarized. Several novel architectures for efficient WPT were proposed in recent years to reduce the number of passive components as well as to improve the system efficiency or flexibility, and these schemes are reviewed and discussed in this chapter.
Yan Lu, Wing-Hung Ki
Chapter 3. Analysis of Coupled-Coils
Abstract
This chapter introduces a design-oriented analysis of various wireless power links driving a resistive load, which include the ideal coupled-coils, the coupled-coils with parasitic resistors, the coupled-coils with series-resonant primary and series-resonant secondary, and the coupled-coils with series-resonant primary and parallel-resonant secondary. The standard equation-pair of coupled-inductors is employed to analyze the above configurations to obtain (1) the reflected impedance of the secondary circuit detected at the primary side, (2) the link voltage gain and (3) the link efficiency. We label the analysis as design-oriented by presenting the equations with parameters arranged in a way that expose the physical meaning of the results and help with designing the coupled-coils more systematically and effectively.
Yan Lu, Wing-Hung Ki
Chapter 4. Circuit Design of CMOS Rectifiers
Abstract
This chapter discusses the design considerations and the state-of-the-art designs of CMOS rectifiers for wireless power receivers. First, the forward current conduction capability and the reverse leakage current of on-chip passive diodes are investigated and compared. Next, comparator-based active rectifiers for near-field WPT solutions are discussed and demonstrated with a couple of design examples. Moreover, a near-optimal adaptive on- and off-delay compensation technique is introduced. Other rectifier topologies, such as the delay-locked-loop (DLL) based rectifier and the threshold-voltage compensated rectifier, are also discussed. In addition, rectifiers for RF energy harvesting for far-field WPT are discussed as well.
Yan Lu, Wing-Hung Ki
Chapter 5. Linear Regulators for WPT
Abstract
Linear regulator is an area-efficient component for voltage regulation that could achieve excellent power supply ripple rejection. With no switching activities as compared to a switched-inductor or switched-capacitor power converter, it can serve as a well-controlled power source for digital and especially noise-sensitive analog circuits. It is very suitable for miniature and low-power systems, such as wireless power receivers for portable and implantable applications. This chapter starts with the basic topologies of linear regulators followed by control loop design. Various circuit techniques are demonstrated through the design of two fully-integrated examples that were implemented in 65 nm and 28 nm bulk CMOS processes, respectively.
Yan Lu, Wing-Hung Ki
Chapter 6. DC-DC Converters for WPT
Abstract
Operation principles of both inductor-based and switched-capacitor DC-DC converters are introduced in this chapter. Different aspects of these two types of DC-DC converters are investigated and compared. In particular, benefits and design obstacles of the time-interleaving multiphase topology are reviewed and discussed. Simulation and measurement results show that the unity-gain bandwidth of a pulse-frequency modulation (PFM) control loop can be designed to be a few times higher than the switching frequency suitable for fast transient applications.
Yan Lu, Wing-Hung Ki
Chapter 7. Power Amplifiers for WPT
Abstract
Two main choices of the power amplifier (PA) for wireless power transfer (WPT) are Class-D and Class-E PAs. In this chapter, process selection and power loss analysis for high efficiency PAs are discussed first, followed by the discussion on zero-voltage (or zero-current) switching techniques for switching loss reduction. Operation principles and design considerations of both Class-D and Class-E PAs are then discussed. Finally, comparisons are made between these two selections.
Yan Lu, Wing-Hung Ki
Chapter 8. Conclusions and Future Works
Abstract
In this chapter, we summarize the contents of the book and make a few remarks on the design perspectives of each building block of the wireless power transfer system. Potential research and development directions are suggested for the consideration of research students and engineers who are working on or going to work on this promising area.
Yan Lu, Wing-Hung Ki
Metadaten
Titel
CMOS Integrated Circuit Design for Wireless Power Transfer
verfasst von
Yan Lu
Wing-Hung Ki
Copyright-Jahr
2018
Verlag
Springer Singapore
Electronic ISBN
978-981-10-2615-7
Print ISBN
978-981-10-2614-0
DOI
https://doi.org/10.1007/978-981-10-2615-7

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