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BS EN 63028:2017

$215.11

Wireless Power Transfer. AirFuel Resonant Baseline System Specification (BSS)

Published By Publication Date Number of Pages
BSI 2017 102
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This document defines technical requirements, behaviors and interfaces used for ensuring interoperability for flexibly coupled wireless power transfer (WPT) systems for AirFuel Resonant WPT. This document is based on AirFuel Wireless Power Transfer System Baseline System Specification (BSS) v1.3.

Products implementing this document are expected to follow applicable regulations and global standards.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 CONTENTS
12 FOREWORD
14 INTRODUCTION
15 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
18 3.2 Symbols and abbreviated terms
3.2.1 Symbols
22 3.2.2 Abbreviated terms
4 System description
23 5 Conformance and backwards compatibility
Figures
Figure 1 – Wireless power transfer system
24 6 Device types
6.1 PTU classification
Figure 2 – PTU-PRU resonator PTX_IN
Tables
Table 1 – PTU classification
25 6.2 PRU category
7 Power transfer specifications
7.1 System equivalent circuit and reference parameters
Figure 3 – PTU-PRU resonator PRX_OUT
Figure 4 – Equivalent circuit and system parameters
Table 2 – PRU category
26 7.2 General system requirements
7.2.1 Operating frequency
7.2.2 ZTX_IN relationship to RRECT
7.2.3 Power stability
7.2.4 PTU co-location protection
7.2.5 PRU self-protection (informative)
7.3 Resonator requirements
7.3.1 Resonator coupling efficiency (RCE)
27 7.3.2 PTU resonator requirements
Table 3 – Minimum RCE (percent and dB) between PRU and PTU
29 7.3.3 PRU resonator requirements
Figure 5 – PTU resonator-load considerations
30 7.4 Load parameters
7.4.1 Load parameters introduction
31 7.4.2 Minimum load resistance
7.4.3 Maximum allowable dynamic load
7.4.4 Maximum load capacitance
8 Power control specifications
8.1 Control objectives
8.2 PTU specifications
8.2.1 PTU state
Table 4 – Maximum load capacitance
32 8.2.2 General state requirements
Figure 6 – PTU state model
33 8.2.3 PTU power save state
Table 5 – Time requirement to enter PTU Power Transfer state
34 Figure 7 – Beacon sequences
Figure 8 – Load variation detection
35 8.2.4 PTU Low Power state
Figure 9 – Discovery
36 8.2.5 PTU Power Transfer state
Figure 10 – PTU ITX transition responses
37 Table 6 – Sub-state of PTU Power Transfer
38 8.2.6 PTU Configuration state
39 8.2.7 PTU Local Fault state
8.2.8 PTU latching fault state
40 8.2.9 PTU state transitions
42 Table 7 – PTU latching faults
43 8.2.10 PTU Test Mode
8.3 PRU specifications
8.3.1 PRU general requirements
46 8.3.2 PRU state model
Figure 11 – PRU state model
Table 8 – Example of accuracy of reported current
47 8.3.3 Null state
8.3.4 PRU boot
8.3.5 PRU On state
Figure 12 – VRECT operating regions
48 8.3.6 PRU System Error state
49 8.3.7 PRU state transitions
50 9 Signaling specifications
9.1 Architecture and state diagrams
9.1.1 Architecture
Figure 13 – Basic architecture of WPT system
Table 9 – PRU system errors
51 9.1.2 Overall charge process
52 Figure 14 – Basic state procedure (informative)
53 9.2 Charge procedure and requirements
9.2.1 Removing PRU from WPT network
9.2.2 Power Sharing mode
54 9.3 Bluetooth low energy requirements
9.3.1 Bluetooth low energy requirements introduction
9.3.2 Bluetooth low energy objectives
9.3.3 PTU hardware requirement
9.3.4 PRU hardware requirement
9.3.5 Basic network structure
9.3.6 RF requirements
55 9.3.7 Timing and sequencing requirements
Table 10 – RF budget (informative)
57 Figure 15 – Registration period timeline example (informative)
Table 11 – Timing constraints
58 9.3.8 Profile structure
9.4 BLE profile definition
9.4.1 GATT sub-procedure
9.4.2 Configuration
Table 12 – BLE profile characteristics
Table 13 – GATT sub-procedure
59 9.4.3 PRU requirements
Figure 16 – PTU/PRU services/characteristics communication
60 9.4.4 PTU requirements
9.4.5 Connection establishment
62 9.4.6 Security considerations
9.4.7 Charge completion
63 9.5 WPT service characteristics
9.5.1 WPT service characteristics introduction
9.5.2 PRU advertising payload
Table 14 – PRU advertising payload
65 9.5.3 WPT service
Table 15 – Impedance shift bit
Table 16 – WPT service UUID
66 Table 17 – WPT service
67 9.5.4 PRU control
Table 18 – GAP service
Table 19 – GATT service
68 Table 20 – PRU Control Characteristic
Table 21 – Detail: bit field for enables
69 9.5.5 PTU static parameter
Table 22 – Detail: bit field for permission
Table 23 – Detail: bit field for time set
70 Table 24 – PTU reporting static values to PRU
Table 25 – Detail: bit field for optional fields validity
71 Table 26 – PTU power
72 Table 27 – Max source impedance
73 Table 28 – Max load resistance
74 9.5.6 PRU static parameter characteristic
Table 29 – AirFuel protocol revision field
Table 30 – PTU number of devices
75 Table 31 – PRU reporting static values to the PTU
Table 32 – Detail: bit field for optional fields validity
76 Table 33 – Detail: bit field for PRU information
77 9.5.7 PRU dynamic parameter characteristic
78 Table 34 – PRU dynamic parameter characteristic
Table 35 – Detail: bit field for optional fields validity
80 Table 36 – Detail: bit field for PRU alert
81 9.5.8 PRU alert characteristic
Table 37 – Detail: bit field for PRU alert
Table 38 – Test mode commands
82 Table 39 – PRU alert fields
Table 40 – Detail: bit field for PRU alert notification
83 9.6 Cross connection algorithm
9.6.1 Cross connection algorithm introduction
9.6.2 Definitions
9.6.3 Acceptance of advertisement
9.6.4 Impedance shift sensing
Table 41 – Mode transition
84 9.6.5 Reboot bit handling
9.6.6 Time set handling
85 9.7 Mode transition
9.7.1 Mode transition introduction
9.7.2 Mode transition procedure
86 9.7.3 BLE reconnection procedure
Figure 17 – PRU mode transition – Device Address field set to a non-zero value
87 Figure 18 – PRU mode transition – Device Address field set to all zeros
88 10 PTU resonators
10.1 PTU resonators introduction
10.2 Class n design template
10.2.1 Class n design template introduction
10.2.2 Table of specifications
10.2.3 PTU resonator structure
10.3 Approved PTU resonators
89 Annex A (informative)Reference PRU for PTU acceptance testing
A.1 Category 1
A.2 Category 2
A.3 Category 3
A.3.1 PRU design 3-1
A.3.2 Geometry
Figure A.1 – PRU design 3 block diagram
Table A.1 – PRU table of specifications
90 Figure A.2 – Front view
Figure A.3 – Back view
91 Figure A.4 – Side view
Figure A.5 – Front view, coil only
Figure A.6 – Side view, coil only
92 A.4 Category 4
A.5 Category 5
93 Annex B (informative)Lost power
B.1 Overview
B.2 General
B.3 Cross connection issues
B.4 Handoff issues
94 B.5 Power noise issues
B.6 PTU lost power calculation
B.6.1 Lost power detection threshold
B.6.2 Lost power detection speed
B.6.3 PTU lost power calculation
B.6.4 PTU power transmission detection accuracy
B.6.5 PRU lost power reports
95 B.6.6 Accuracy of reported power
B.6.7 Other PRU lost power reports
96 Annex C (normative)User experience requirements
C.1 General
C.2 User indication
C.2.1 PRU user indication
C.2.2 PTU user indication
97 Annex D (informative)RCE calculations
D.1 RCE calculation (using S-parameters)
98 D.2 RCE calculation (using Z-parameters)
99 D.2.1 Series tuned case
D.2.2 Other RCE calculations
D.3 Conversion between S-parameters and Z-parameters
BS EN 63028:2017
$215.11