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eLibrary > 24/30489437 DC BS EN IEC 63563-7 Qi Specification version 2.0 - Part 7. Foreign Object Detection (Fast track) >

24/30489437 DC BS EN IEC 63563-7 Qi Specification version 2.0 - Part 7. Foreign Object Detection (Fast track), 2024

30489437-NC.pdf
100_4128e_CDV.pdf [Go to Page]
IEC20ED120Specification202.020Part20Foreign20Detection-Fast%20track (1).pdf [Go to Page]
1 General [Go to Page]
1.1 Structure of the Qi Specification
1.2 Scope
1.3 Compliance
1.4 References
1.5 Conventions [Go to Page]
1.5.1 Notation of numbers
1.5.2 Tolerances
1.5.3 Fields in a data packet
1.5.4 Notation of text strings
1.5.5 Short-hand notation for data packets
1.6 Power Profiles
2 Introduction
3 Avoidance of Foreign Object heating [Go to Page]
3.1 Representative Foreign Objects
4 Pre-power transfer FOD methods [Go to Page]
4.1 Empty surface test
4.2 Resonance change [Go to Page]
4.2.1 Measure the resonance properties
4.2.2 Obtain reference values
4.2.3 Determine the presence of a Foreign Object
4.2.4 Inform the Power Receiver
4.2.5 Stop the power transfer
5 In-power transfer FOD methods [Go to Page]
5.1 Basic power loss accounting [Go to Page]
5.1.1 Method
5.1.2 Received power accuracy
5.1.3 FOD threshold
5.2 Calibrated power loss accounting [Go to Page]
5.2.1 Calibrated FOD threshold
5.2.2 Calibration protocol
5.2.3 Calibration performance considerations
Annex A: Determining the reference FOD values (normative)
Annex B: Open-air Q test (informative) [Go to Page]
B.1 General flow for the open-air Q test
B.2 Measuring the quality factor [Go to Page]
B.2.1 Estimate Q from the decay of the ringing response to a pulse
B.2.2 Compute Q from a coil impedance measurement
B.3 Impact of objects on the Q deflection
B.4 Compensated Q-deflection
B.5 Choosing a threshold
B.6 Temperature compensation
B.7 Potential implementation issues [Go to Page]

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