Wireless Charging - EEs Talk Tech #3 - Keysight Technologies

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Learn about the difference between inductive and resonant techniques, as well as who's implementing the technology (it might surprise you!). Daniel Bogdanoff, Brig Asay, and Johnnie Hancock discuss.

Read Johnnie's wireless charging application notes:

Part 1: Measurements during the power transfer state http://literature.cdn.keysight.com/litweb/pdf/5992-1109EN.pdf

Part 2: Measurements during the power save state http://literature.cdn.keysight.com/litweb/pdf/5992-1110EN.pdf

Part 3: Power and efficiency measurements http://literature.cdn.keysight.com/litweb/pdf/5992-1111EN.pdf

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Discussion Overview: Intro 00:00 Efficiency measurements for wireless charging system 01:02 Basics of wireless charging 01:53 Phones without built-in wireless charging functionality Phone case to enable wireless charging 02:05 Wireless charger and phone as primary and secondary transformer 02:16

Magnetic Inductive vs Magnetic Resonant techniques for Wireless Charging Magnetic resonance versus inductance for wireless charging 02:39 Magnetic inductance 02:54 Qi technology 03:05 Rezence/Airfuel/A4WP (alliance for wireless power) Magnetic inductance runs at a lower frequency 03:21 Device communication - "ping" 03:30 Load change, load modulation, handshaking 03:39 Spool of wire as load 04:05 Two main states - polling/power save 04:23 Magnetic resonance 04:39 Proximity of device to charging pad for magnetic inductance charging 05:00 Charge multiple devices wirelessly with magnetic resonance using one large charging coil 05:31 Can you mount a charging pad under table/surface? 05:46 Surface material types that do and do not allow charging 06:07

Where is wireless charging available? Integration of wireless charging into non-electronic devices 06:28 New infrastructure - Furniture makers, coffee shops 06:52 Wireless charging pads built into furniture 07:01 Magnetic inductance, built into surface of furniture 07:06 Coffee shops in the future may have wireless charging in the tables and counters Wireless charging might not be free 07:35 Near field communication (NFC) 07:52

Is wireless charging secure? There's a possibility of data transfer (non power-related information) 08:04 Magnetic resonance has parallel com ... https://www.youtube.com/watch?v=xsC5_ML8J88