E-Book, Englisch, 223 Seiten
Schuylenbergh / Puers Inductive Powering
1. Auflage 2009
ISBN: 978-90-481-2412-1
Verlag: Springer Netherlands
Format: PDF
Kopierschutz: 1 - PDF Watermark
Basic Theory and Application to Biomedical Systems
E-Book, Englisch, 223 Seiten
Reihe: Analog Circuits and Signal Processing
ISBN: 978-90-481-2412-1
Verlag: Springer Netherlands
Format: PDF
Kopierschutz: 1 - PDF Watermark
Inductive powering has been a reliable and simple method for many years to wirelessly power devices over relatively short distances, from a few centimetres to a few feet. Examples are found in biomedical applications, such as cochlear implants; in RFID, such as smart cards for building access control; and in consumer devices, such as electrical toothbrushes. Device sizes shrunk considerably the past decades, demanding accurate design tools to obtain reliable link operation in demanding environments. With smaller coil sizes, the link efficiency drops dramatically to a point where the commonly used calculation methods become invalid. Inductive Powering: Basic Theory and Application to Biomedical Systems lists all design equations and topology alternatives to successfully build an inductive power and data link for your specific application. It also contains practical guidelines to expand the external driver with a servomechanism that automatically tunes itself to varying coupling and load conditions.
Autoren/Hrsg.
Weitere Infos & Material
1;Preface;6
2;Symbols and units;8
3;Table of contents;13
4;1 An introduction on telementry;17
4.1;1.1 WIRELESS CONNECTIONS;18
4.2;1.2 HOW TO CHOOSE BETWEEN LINK TYPES?;36
4.3;1.3 CONCLUSIONS;49
4.4;1.4 REFERENCES;49
5;2 The concepts of inductive powering;56
5.1;2.1 INDUCTION THEORY;57
5.2;2.2 INDUCTIVE POWERING;62
5.3;2.3 THE DRIVEN INDUCTIVE LINK;67
5.4;2.4 LINK OPTIMISATION;82
5.5;2.5 DISCUSSION: OPTIMISATION OF WEAKLY COUPLED LINKS;86
5.6;2.6 CONCLUSIONS;89
5.7;2.7 REFERENCES;89
6;3 Exact link formulae;92
6.1;3.1 INDUCTIVE LINKS WITH A PARALLEL-RESONANT SECONDARY;94
6.2;3.2 INDUCTIVE LINKS WITH A SERIESRESONANT SECONDARY;107
6.3;3.3 CONCLUSIONS;115
6.4;3.4 REFERENCES;116
7;4 Primary coil drivers;117
7.1;4.1 CLASS C;120
7.2;4.2 MODELLING OF SWITCH TRANSISTORS;124
7.3;4.3 CLASS D;126
7.4;4.4 THE IMPORTANCE OF SUPPLY DECOUPLING;131
7.5;4.5 IDEAL ACTIVE-DEVICE BEHAVIOUR;132
7.6;4.6 SATURATING CLASS C;134
7.7;4.7 CLASS E;141
7.8;4.8 CLASS E WITH 1 COIL AND 1 CAPACITOR;150
7.9;4.9 DRIVING WEAKLY COUPLED LINKS;151
7.10;4.10 CONCLUSIONS;153
7.11;4.11 REFERENCES;155
8;5 Optimisation of the driven inductive link;158
8.1;5.1 OPTIMISATION OF THE DRIVEN LINK;159
8.2;5.2 THE OPTIMISATION STRATEGY;165
8.3;5.3 DESIGN EXAMPLE;175
8.4;5.4 CONCLUSIONS;179
8.5;5.5 REFERENCES;180
9;6 Automatic link tuning;182
9.1;6.1 AUTOMATIC SEARCH OF THE TRANSFER FREQUENCY AND AUTO-REGULATION OF THE DRIVER POWER;183
9.2;6.2 SWITCH-MODE COIL DRIVER WITH LOAD-RESONANCE CONTROL;186
9.3;6.3 PROTOTYPE RESULTS AND DISCUSSION;188
9.4;6.4 REFERENCES;190
10;A1 Vector Formulae;191
11;A2 Coil models and measurements;193
12;A3 Saturating-class-C amplifiers;206
13;Index;229
