Wireless Power Transfer, 2nd Edition ( River Publishers Series in Communications )

Publication series :River Publishers Series in Communications

Author: Agbinya> Johnson I.  

Publisher: River Publishers‎

Publication year: 2016

E-ISBN: 9788793237636

P-ISBN(Paperback): 9788793237629

Subject: TM724 wire - free transmission

Keyword: 无线电电子学、电信技术

Language: ENG

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Chapter

2.6.4 Application of Cylindrical Resonator

2.7 Discussion

2.8 Conclusions

References

Chapter 3 - Low Power Rectenna Systems for Wireless Energy Transfer

3.1 Introduction

3.1.1 History of Wireless Power Transfer

3.1.2 Wireless Power Transfer Techniques

3.1.2.1 DC-RF conversion

3.1.2.2 Electromagnetic wave propagation

3.1.2.3 RF-DC conversion

3.2 Low Power Rectenna Topologies

3.2.1 Circuit Topologies

3.2.1.1 Series-mounted diode

3.2.1.2 Shunt-mounted diode

3.2.1.3 Voltage-doubler topology

3.2.1.4 Diode bridge topology

3.2.1.5 Transistor-based rectennas

3.2.2 Rectenna Associations

3.2.3 Modeling a Rectenna

3.2.4 A Designer’s Dilemma

3.2.4.1 Output characteristics

3.2.4.2 Antenna impedance influence

3.3 Reconfigurable Electromagnetic Energy Receiver

3.3.1 Typical Application

3.3.2 Rectenna Circuit Configuration

3.3.3 Reconfigurable Architecture

3.3.3.1 Antenna switch

3.3.3.2 Global performance

3.3.3.3 Output load matching

3.4 Conclusions

References

Chapter 4 - Wireless Power Transfer: Generation,Transmission, and Distribution Circuit Theory of Wireless Power Transfer

4.1 Introduction

4.2 Criteria for Efficient Resonant Wireless Power Transfer

4.2.1 High Power Factor (cos θ = 1)

4.2.2 High Coupling Coefficient (k ≈ 1)

4.2.3 High Quality (Q >> 1) Factors

4.2.4 Matching Circuits

4.2.5 Focusing of Magnetic Field

4.3 Resonant Wireless Power Transfer

4.3.1 Higher-Order WPT Systems

4.4 Loosely Coupled Wireless Power Transfer System

4.4.1 Low Q1 and Q2

4.4.2 High Q1 and Q2

4.5 Efficiency

4.6 Summary

Chapter 5 - Inductive Wireless Power Transfer Using Circuit Theory

5.1 Introduction

5.2 Advantages of Inductive Coupling for Energy Transfer

5.3 Applications of Inductive Power Transfer

5.4 Fundamentals of Inductive Coupling

5.4.1 Inductive Coupling and Transformer Action

5.4.2 Resonant Circuit Topologies

5.4.3 Power Transfer across a Poorly Coupled Link

5.4.4 Near-and Far-Field Regions

5.4.5 The Importance of the Loop Antenna

5.4.6 Small Loop of Constant Current

5.4.7 The Loop in Transmitting Mode

5.4.8 The Loop in the Receiving Mode

5.5 Mutual Inductance of Coupled Coils

5.6 The Loosely Coupled Approximation

5.7 Summary

References

Chapter 6 - Recent Advances on Magnetic Resonant Wireless Power Transfer

6.1 Introduction

6.2 Coupled Inductors

6.2.1 Coupled Inductors

6.2.2 The Series Resonant Circuit

6.2.3 Adding Resonators to the Coupled Inductors

6.2.4 Maximum Efficiency, Maximum Power on the load,and Conjugate Matching:Two-Port Case

6.2.5 Maximum Efficiency: N-port Case

6.2.6 Scattering Matrix Representation of a Wireless Power Transfer Network

6.3 Four Coupled Resonators

6.4 Travelling Waves, Power Waves and Conjugate Image Impedances

6.4.1 TravellingWaves and Power Waves

6.4.2 Conjugate Image Impedances

6.5 Measurement of the Resonator Quality Factor

6.6 Examples of Coupled Resonators for WPT

6.7 Design of the Oscillator Powering the Resonant Link

6.8 Conclusions

6.9 Exercises

6.9.1 MATLAB function for single-loop inductance computation

6.9.2 MATLAB function for two coaxial conducting loops mutual inductance computation

References

Chapter 7 - Techniques for Optimal Wireless Power Transfer Systems

7.1 Introduction

7.2 Flux Conentrators

7.2.1 Splitting of Coupling Coefficients

7.2.2 Doubling of Coil Radius

7.3 Separators

7.3.1 Simulations

7.3.2 Effect of Concentrator Quality Factor

7.3.3 Effect of Concentrator Radius

7.4 Approximate Magneto-Inductive Array Coupling Functions

7.4.1 System Specifications

7.4.2 Power Relations in Inductive Systems

7.4.3 Algorithm for Approximate Transfer Function

7.4.4 Interpretation of Algorithm

7.4.5 Correction Terms

7.5 Wireless Feedback Modelling

7.5.1 Wireless Feedback

7.5.2 Q-Based Explanation of Wireless Closed-Loop Transfer Function

7.6 Conclusions

References

Chapter 8 - Directional Tuning/Detuning Control of Wireless Power Pickups

8.1 Introduction

8.1.1 Shorting Control

8.1.2 Dynamic Tuning/Detuning Control

8.2 Directional Tuning/Detuning Control (DTDC)

8.2.1 Fundamentals of DTDC

8.2.2 Coarse-Tuning Stage

8.2.2.1 Coarse tuning in region A

8.2.2.2 Coarse tuning in region B

8.2.2.3 Coarse tuning in region C

8.2.2.4 Coarse tuning in region D

8.2.3 Fine-Tuning Stage

8.2.3.1 Fine-tuning between regions A and B

8.2.3.2 Fine-tuning between regions C and D

8.2.4 Design and Performance Considerations of DTDC

8.2.4.1 Category I

8.2.4.2 Category II

8.2.4.3 Category III

8.2.5 Standard Procedure of DTDC

8.3 DTDC-Controlled Parallel-Tuned LC Power Pickup

8.3.1 Fundamentals of Parallel-Tuned LC Power Pickup

8.3.2 Controllable Power Transfer Capacity of Parallel-Tuned LC Power Pickup

8.3.3 Effects of Parameter Variations on Output Voltage of Parallel-Tuned LC Power Pickup

8.3.4 Operating Frequency Variation

8.3.5 Magnetic Coupling Variation

8.3.6 Load Variation

8.3.7 Operating Range of Variable CS

8.3.7.1 Maximum required ratio (radj pv max)

8.3.7.2 Minimum required ratio (radj pv min)

8.3.8 Implementation of DTDC Controlled Parallel-Tuned LC Power Pickup

8.3.8.1 Selection of CS1 and CS2

8.3.8.2 Equivalent Capacitance of CS2

8.3.8.3 Integration of Control and ZVS Signals for Q1 and Q2

8.4 Conclusions

8.5 Problems

References

Chapter 9 - Technology Overview and Concept of Wireless Charging Systems

9.1 Introduction

9.2 System Technology

9.2.1 Power Converter

9.2.2 Compensation Networks

9.2.3 Electromagnetic Structures

9.2.4 Power Conditioner

9.3 Applications

9.4 Development of Wireless Low-Power Transfer System

9.4.1 Methodology

9.4.1.1 Finite element formulation

9.4.2 D Planar Wireless Power Transfer System

9.4.2.1 Primary track loop

9.4.2.2 Pickup

9.4.3 Wireless Power Transfer System

9.4.3.1 Continuous mode of operation

9.4.3.2 Discontinuous mode of operation

9.4.3.3 Development

9.5 Conclusions

9.6 Problems

References

Chapter 10 - Wireless Power Transfer in On-Line Electric Vehicle

10.1 Introduction

10.1.1 Wireless Power Transfer Technology

10.1.2 Wireless Power Transfer System in the Market

10.1.2.1 Application to automobiles

10.2 Mechanism of Wireless Power Transfer

10.2.1 Electric Field and Magnetic Field

10.2.2 Inductive Coupling and Resonant Magnetic Coupling

10.2.3 Topology Selection and Coil Design

10.3 Design of On-Line Electric Vehicle

10.3.1 Necessity of On-Line Electric Vehicle

10.3.2 Challenges

10.3.3 Topology Analysis

10.3.4 Coil Design for Electric Vehicle

10.3.5 Electromagnetic Field Reduction Technology

10.3.6 Design Procedure and Optimization

10.4 Conclusions

10.5 Problems

References

Chapter 11 - Wireless Powering and Propagation of Radio Frequencies through Tissue

11.1 Introduction

11.2 Comparison of Transcutaneous Powering Techniques

11.3 Analysis

11.3.1 Reflections at an Interface

11.3.2 Attenuation Due to Tissue Absorption

11.3.3 Energy Spreading (Free-Space Path Loss)

11.3.4 Expanding to Multiple Layers and Interfaces

11.4 Simulation Modeling

11.5 Empirical Studies

11.6 Antenna Design and Frequency Band Selection

11.7 Power Conversion Circuitry

11.8 Benefiting Applications and Devices

11.9 Conclusions

11.10 Problems

References

Chapter 12 - Microwave Propagation and Inductive Energy Coupling in Biological Human Body Tissue Channels

12.1 Introduction

12.2 ElectromagneticWave Propagation in Tissues

12.2.1 Wave Reflections in Tissues

12.2.2 Matlab Simulations

12.3 Applications

12.4 Inductive Energy Coupling Systems in Tissues

12.5 Bio-Impedance Models of Tissues

12.5.1 Skin Model

12.5.2 Matlab Simulations

12.6 Impact of Tissue Impedance on Inductive Coupling

12.7 Circular Coil

12.8 Conclusions

References

Chapter 13 - Critical Coupling and Efficiency Considerations

13.1 Introduction

13.2 Two-Coil Coupling Systems

13.2.1 Strong-Coupling Regime

13.2.2 Weak-Coupling Regime

13.3 Efficiency and Impedance Matching

13.3.1 Efficiency of Peer-to-Peer WPT

13.4 Impedance Matching and Maximum Power Transfer Considerations

13.4.1 Bi-Conjugate Matching

13.5 Reflected Impedance

13.5.1 Two-Coil Systems

13.5.2 Three-Coil Systems

13.5.3 Four-Coil Systems

13.6 Relating Reflected Impedance to Impedance Matching

13.6.1 Three-Coil Systems

References

Chapter 14 - Impedance Matching Concepts

14.1 Introduction

14.1.1 Rationale and Concept

14.1.2 Applications of Impedance Matching

14.1.3 Transmission-Line Impedance Matching

14.1.3.1 Characteristic impedance

14.1.3.2 Reflection coefficient

14.1.3.3 Standing wave ratio

14.1.4 Impedance Matching Circuits and Networks

14.1.4.1 Ideal transformer model of WPT

14.1.4.2 Ideal transformer model

14.1.5 Q-Section Impedance Matching

References

Chapter 15 - Impedance Matching Circuits

15.1 Introduction

15.1.1 Series–Parallel Transformations

15.1.2 Impedance Matching with L-Sections

15.1.2.1 Low-pass sections

15.1.2.2 High-pass sections

15.1.3 Equivalent Circuits

15.2 Impedance Matching Networks

15.2.1 π-Networks

15.2.2 T-Networks Design

15.2.2.1 LCC design procedure

15.2.3 Tunable Impedance Matching Networks

15.2.4 Simplified Conjugate Impedance Matching Circuit

15.2.4.1 Impedance matching and maximum power transfer consideration

References

Chapter 16 - Design, Analysis, and Optimization of Magnetic Resonant Coupling Wireless Power Transfer Systems Using Bandpass Filter Theory

16.1 Introduction

16.2 MRC System Equivalent to BPF

16.2.1 Impedance Inverters

16.2.2 Two-Stage BPF-Modeled MRC Circuit

16.2.3 Realization of K-Inverter Circuit and System Matching Conditions

16.2.4 Example BPF-Modeled MRC WPT System Response

16.3 BPF Model with Lossy Resonator Optimization

16.3.1 Lossy Series Resonant Circuit

16.3.2 Determination of S21 Function for Lossy Resonator BPF-Modeled MRC WPT System

16.3.3 Determination of Optimal KS1 and K2L Values for Lossy Resonator System

16.3.4 Circuit Simulation Results and Effect of Q0n on Maximum Achievable PTE

16.4 BPF Model Analysis Using General Coupling Matrix

16.4.1 Synthesis of Source and Load Coupling Matrix for BPF-Modeled MRC WPT System

16.4.2 Determination of MS1opt and M2Lopt

16.4.3 Examination of MS1opt and M2Lopt on Full S21 Response

16.4.4 Examination of MS1opt and M2Lopt on |S21|ω=ω0 Response

16.4.5 Investigation of Relationship between k12tgt and k12 crit

16.5 Experimental Validation

16.5.1 Resonator Design and Determination of WPT System Design Parameters

16.5.2 Optimum Determined K-inverter Capacitance Values

16.5.3 Theoretical versus Measured PTE Response

16.6 Summary of General Coupling Matrix Design Procedure

16.7 Future Work

16.8 Conclusion

References

Chapter 17 - Multi-Dimensional Wireless Power Transfer Systems

17.1 Introduction

17.2 Related Work

17.3 Network of Multidimensional Coils and Radiation Pattern

17.4 Voltage and Current Relation of MDC

17.4.1 Configuration 1

17.4.2 Configuration 2

17.4.3 Configuration 3

17.4.4 Configuration 4

17.4.5 Configuration 5 (The Simple Coil)

17.4.6 Configuration 6

17.4.7 Configuration 7

17.4.8 Configuration 8

17.5 Conclusion

References

Chapter 18 - Split Frequencies in Magnetic Induction Systems

18.1 Introduction

18.2 Single Transmitter–Receiver

18.3 Determination of Splitting Frequency

18.3.1 Single Transmitter and Multiple Receiver Configuration

18.3.2 ATransmitter and Two Receivers (SI2O)

18.3.2.1 Without cross-coupling between receivers

18.3.2.2 With cross-coupling between receivers

18.3.2.3 Determination of the power transfer for SI2O

18.4 A Transmitter and Three Receivers (SI3O)

18.4.1 Without Cross-Coupling between the Receivers

18.4.2 With the Effect of Cross-Coupling between the Receivers

18.5 A Transmitter and N Receivers (SIMO)

18.5.1 Without Cross-Couplings between the Receivers

18.5.1 Without Cross-Couplings between the Receivers

18.5.2 With the Effect of Cross-Coupling between the Receivers

18.5.3 Multiple Transmitter and a Receiver Configuration

18.6 Multiple Transmitters and Multiple Receivers (MIMO)

18.6.1 Determination of Splitting Frequencies (2Tx-2Rx)

18.6.2 Cross-Couplings Are Ignored

18.6.3 With Cross-Coupling

18.7 Summary

References

Chapter 19 - Recent Advances in Wireless Powering for Medical Applications

19.2 Consortiums, Standards, and WPT in the Consumer Market

19.3 History of Wireless Powering in Medical Implantable Devices

19.4 Development of a Commercial Rechargeable Active Implantable Medical Device

19.4.1 Product Design Implications

19.4.2 Computational Modeling

19.5 Comparison of Commercially Available Rechargeable Active Implantable Devices

19.6 Resonance Power Transfer

19.7 Far-Field MIMO

19.8 Midfield Powering

19.9 Acoustic Powering

19.10 Conclusions

References

Chapter 20 - Induction Cooking and Heating

20.1 Introduction

20.2 Advantages of Induction Cooking

20.3 Theory of Induction Heating

20.4 Building Blocks of Induction Cooker

20.4.1 Rectifiers

20.4.1.1 SCR rectifiers

20.4.1.2 Half-wave scr rectifier

20.4.1.3 Full-wave scr rectifier

20.4.2 Inverters

20.4.2.1 Fourier series of output voltage

20.4.2.2 IGBT inverters

20.4.2.2.1 LCL configuration

20.4.2.2.2 CCL configuration

20.4.3 Half-Bridge Inverter Design

References

Index

Editor’s Biography

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