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BSI 24/30489437 DC 2024

BSI 24/30489437 DC 2024

$13.70

BS EN IEC 63563-7 Qi Specification version 2.0 – Part 7. Foreign Object Detection (Fast track)

Published By Publication Date Number of Pages
BSI 2024 51
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PDF Catalog

PDF Pages PDF Title
1 30489437-NC.pdf
3 100_4128e_CDV.pdf
7 1 General
1.1 Structure of the Qi Specification
8 1.2 Scope
1.3 Compliance
1.4 References
9 1.5 Conventions
1.5.1 Notation of numbers
1.5.2 Tolerances
1.5.3 Fields in a data packet
10 1.5.4 Notation of text strings
1.5.5 Short-hand notation for data packets
11 1.6 Power Profiles
12 2 Introduction
13 3 Avoidance of Foreign Object heating
14 3.1 Representative Foreign Objects
15 4 Pre-power transfer FOD methods
16 4.1 Empty surface test
17 4.2 Resonance change
18 4.2.1 Measure the resonance properties
19 4.2.2 Obtain reference values
20 4.2.3 Determine the presence of a Foreign Object
21 4.2.4 Inform the Power Receiver
4.2.5 Stop the power transfer
22 5 In-power transfer FOD methods
5.1 Basic power loss accounting
23 5.1.1 Method
25 5.1.2 Received power accuracy
5.1.3 FOD threshold
28 5.2 Calibrated power loss accounting
5.2.1 Calibrated FOD threshold
30 5.2.2 Calibration protocol
37 5.2.3 Calibration performance considerations
40 Annex A: Determining the reference FOD values (normative)
42 Annex B: Open-air Q test (informative)
43 B.1 General flow for the open-air Q test
44 B.2 Measuring the quality factor
B.2.1 Estimate Q from the decay of the ringing response to a pulse
45 B.2.2 Compute Q from a coil impedance measurement
46 B.3 Impact of objects on the Q deflection
47 B.4 Compensated Q-deflection
49 B.5 Choosing a threshold
50 B.6 Temperature compensation
51 B.7 Potential implementation issues

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BSI 24/30489437 DC 2024
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