Omnidirectional inductive powering of biomedical implants:
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
[Dordrecht]
Springer
2009
|
| Schriftenreihe: | Analog circuits and signal processing
|
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XVI, 222 S. Ill., graph. Darst. 235 mm x 155 mm |
| ISBN: | 9781402090745 |
Internformat
MARC
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Datensatz im Suchindex
| _version_ | 1804140649262350336 |
|---|---|
| adam_text | Titel: Omnidirectional inductive powering of biomedical implants
Autor: Lenaerts, Bert
Jahr: 2009
Contents
Abstract v
List of Abbreviations vii
List of Symbols ix
Contents xiii
1 Introduction 1
1.1 Wireless Power Transmission 1
1.2 Types of Wireless Power Transmission 2
1.2.1 Radiative 2
1.2.2 Conductive 3
1.2.3 Capacitive 4
1.2.4 Inductive 5
1.3 A Biomedical Perspective 6
1.3.1 Instrumentated Implants 6
1.3.2 Transcutaneous Powering 7
1.4 Inductive Links 9
1.4.1 Powering System 9
1.4.2 Data Communication 10
1.5 Conclusions 11
1.6 What to Expect 12
2 Magnetic Induction 13
2.1 Maxwell s Equations 13
2.1.1 Time-Domain, Integral Form 13
2.1.2 Time-Harmonic, Differential Form 14
2.1.3 Constitutive Relations and Ohm s Law 14
2.1.4 Magnetic and Electric Potential 15
2.1.5 Current and Flux 16
2.2 Conductive Wire 17
xiii
Contents
xiv
18
2.3 Inductance
2.4 Inductor Models
2.5 Finite Element Modelling 24
2.5.1 Axisymmetric Geometries 25
2.5.2 2-D Wire Models 32
2.5.3 3-D Models 33
2.5.4 Mutual Inductance 36
2.6 Conclusions
3 Inductive Link Design 3
3.1 Link Equations 39
3.1.1 Important Quantities 39
3.1.2 Equivalent Two-Port Representations 42
3.1.3 Secondary Resonance 43
3.1.4 Transmitted Power 45
3.1.5 Link Efficiency 46
3.1.6 Link Gain and Critical Coupling 48
3.1.7 Parallel vs. Series Resonance 50
3.1.8 Summary 53
3.2 Loose-Coupling Approximation 53
3.3 Tertiary Circuits 55
3.3.1 Conductive Objects 56
3.3.2 Coupled Resonators 61
3.4 Link Optimisation 65
3.4.1 Operating Frequency: co 65
3.4.2 Magnetic Design: Mo 66
3.4.3 Winding Losses: R o and R20 68
3.4.4 Secondary Coil Optimisation: N2 71
3.4.5 Secondary Coil and Capacitance Tapping 75
3.4.6 Advanced Gain Stabilisation 77
3.5 Misconceptions About k and Q 78
3.6 Conclusions 80
4 Power Converters and Voltage Regulators 83
4.1 Rectifiers 83
4.1.1 Diodes 84
4.1.2 Peak Rectifiers 85
4.1.3 Class D Rectifiers 88
4.1.4 Class E Rectifiers 91
4.1.5 To Conclude 91
4.2 Inverters 92
4.2.1 Semiconductor Switches 93
4.2.2 Saturating Class C Inverter 94
4.2.3 Class D Inverters 96
4.2.4 Class E Inverters 97
4.2.5 Alternative Load Networks 102
Contents xv
4.2.6 Design of an Inductive Link Driver 104
4.3 Voltage Regulators 112
4.3.1 Linear Regulators 113
4.3.2 Switching Regulators 115
4.4 Conclusions 116
5 Omnidirectional Coupling 119
5.1 Problem Definition 119
5.2 Multiple Primary Coils 120
5.2.1 System Concept 120
5.2.2 Worst-Coupling Map 121
5.2.3 Capsule Endoscope with One Secondary Coil 123
5.3 Multiple Secondary Coils 127
5.3.1 Power-Combining Rectifiers 127
5.3.2 Worst-Case Conditions 129
5.3.3 Capsule Endoscope with Three Secondary Coils 134
5.4 Conclusions 137
6 Biological Tissue Interaction 139
6.1 Electromagnetic Fields in Biological Tissue 139
6.1.1 Near Field 139
6.1.2 Far Field 142
6.2 Health Effects of Electromagnetic Fields 143
6.2.1 Directly Observable Effects 143
6.2.2 Other Biological Effects 145
6.3 Exposure Limits and Regulations 145
6.4 Examples from Biomedical Engineering Practice 148
6.5 Conclusions 150
7 An Inductive Power Link for a Capsule Endoscope 151
7.1 Wireless Endoscopy 151
7.2 Design: Choices and Motivation 152
7.2.1 Specifications 152
7.2.2 Operating Frequency 152
7.2.3 Coil Configuration 153
7.2.4 Voltage Regulator and Rectifier 153
7.2.5 Power Optimisation 154
7.2.6 Verification 155
7.3 Fabrication 156
7.4 Measurement 160
7.5 Biological Tissue Interaction 163
7.5.1 ICNIRP Compliance 165
7.5.2 Link Efficiency 169
7.5.3 Class E Tuning 170
7.5.4 Secondary Resonance Tuning 172
7.6 Conclusions 72
xvi Contents
8 A Class E Driver for Deformable Coils 175
8.1 Class E ZVS Inverter with Transductor 175
8.2 Control Loop 79
8.3 Measurement Results 83
8.3.1 Deforming the Primary Coil 184
8.3.2 Varying the Frequency 186
8.4 Conclusions 187
9 Conclusions 191
9.1 Comprehensive Summary 191
9.2 Main Contributions and Achievements 193
9.3 Further Research 194
Appendix: Coil Measurements 197
A.I Single Coil Characterisation 197
A. 1.1 General Considerations 197
A.1.2 One-Port Sn Measurement 199
A.1.3 Two-Port Q Measurement 200
A. 1.4 Impedance Analysers and LCR Meters 203
A.2 Coupling Characterisation 204
References 211
Index 219
|
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| indexdate | 2024-07-09T22:03:20Z |
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| isbn | 9781402090745 |
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| spelling | Lenaerts, Bert Verfasser aut Omnidirectional inductive powering of biomedical implants Bert Lenaerts ; Robert Puers [Dordrecht] Springer 2009 XVI, 222 S. Ill., graph. Darst. 235 mm x 155 mm txt rdacontent n rdamedia nc rdacarrier Analog circuits and signal processing Puers, Robert Verfasser aut Erscheint auch als Online-Ausgabe 978-1-4020-9075-2 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018598545&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Lenaerts, Bert Puers, Robert Omnidirectional inductive powering of biomedical implants |
| title | Omnidirectional inductive powering of biomedical implants |
| title_auth | Omnidirectional inductive powering of biomedical implants |
| title_exact_search | Omnidirectional inductive powering of biomedical implants |
| title_full | Omnidirectional inductive powering of biomedical implants Bert Lenaerts ; Robert Puers |
| title_fullStr | Omnidirectional inductive powering of biomedical implants Bert Lenaerts ; Robert Puers |
| title_full_unstemmed | Omnidirectional inductive powering of biomedical implants Bert Lenaerts ; Robert Puers |
| title_short | Omnidirectional inductive powering of biomedical implants |
| title_sort | omnidirectional inductive powering of biomedical implants |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=018598545&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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