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System Description

Wireless Power Transfer

Volume I: Low Power

Part 1: Interface Definition

Version 1.0

July 2010

System Description

Wireless Power Transfer

Version 1.0 Table of Contents

Table of Contents

1 General ................................................................................................................... 1

1.1 Scope ............................................................................................................................................................................................. 1

1.2 Main features ............................................................................................................................................................................. 1

1.3 Conformance and references ............................................................................................................................................. 1

1.4 Definitions .................................................................................................................................................................................. 2

1.5 Acronyms .................................................................................................................................................................................... 3

1.6 Symbols ........................................................................................................................................................................................ 3

1.7 Conventions ............................................................................................................................................................................... 4

1.7.1 Cross references ............................................................................................................................................................ 4

1.7.2 Informative text ............................................................................................................................................................. 4

1.7.3 Terms in capitals ........................................................................................................................................................... 4

1.7.4 Notation of numbers .................................................................................................................................................... 4

1.7.5 Units of physical quantities ...................................................................................................................................... 4

1.7.6 Bit ordering in a byte ................................................................................................................................................... 4

1.7.7 Byte numbering ............................................................................................................................................................. 5

1.7.8 Multiple-bit Fields......................................................................................................................................................... 5

1.8 Operators .................................................................................................................................................................................... 5

1.8.1 Exclusive-OR ................................................................................................................................................................... 5

1.8.2 Concatenation ................................................................................................................................................................. 5

2 System Overview (Informative) .................................................................... 7

3 Basic Power Transmitter Designs ............................................................. 11

3.1 Introduction ............................................................................................................................................................................ 11

3.2 Power Transmitter designs that are based on a single Primary Coil ............................................................ 11

3.2.1 Power Transmitter design A1 .............................................................................................................................. 11

3.2.2 Power Transmitter design A2 .............................................................................................................................. 16

3.3 Power Transmitter designs that are based on an array of Primary Coils ................................................... 20

3.3.1 Power Transmitter design B1 .............................................................................................................................. 20

3.3.2 Power Transmitter design B2 .............................................................................................................................. 26

4 Power Receiver Design Requirements ..................................................... 29

4.1 Introduction ............................................................................................................................................................................ 29

4.2 Power Receiver design requirements ......................................................................................................................... 30

4.2.1 Mechanical requirements ....................................................................................................................................... 30

4.2.2 Electrical requirements ........................................................................................................................................... 31

5 System Control ................................................................................................. 35

5.1 Introduction ............................................................................................................................................................................ 35

5.2 Power Transmitter perspective ..................................................................................................................................... 38

5.2.1 Ping phase ..................................................................................................................................................................... 38

5.2.2 Identification & configuration phase ................................................................................................................. 39

5.2.3 Power transfer phase ............................................................................................................................................... 42

5.3 Power Receiver perspective ............................................................................................................................................ 46

5.3.1 Selection phase............................................................................................................................................................ 46

5.3.2 Ping phase ..................................................................................................................................................................... 47