Introduction to the Alliance for Wireless Power (A4WP)
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Transcript of Introduction to the Alliance for Wireless Power (A4WP)
Introduction to the
Alliance for Wireless Power
(A4WP)
June 2014
Wireless Charging Trend
100M Wirelessly powered devices by 2015
1
10+ Devices need to be charged for normal operation in the average U.S. household
2
Source: 1IHS 2014, 2ABI Research 2013
100% 50% 0% 75% 25%
The Vision of Ubiquitous Power
Hu
ma
n C
og
nit
ive
Lo
ad
& S
tre
ss
Energy Management Drivers
Social “Green”
Awareness
Smart Grid Information
Explosion
Device Battery
Charging Demands
Consumers have become device “power managers”
The Vision of Ubiquitous Power
– Goals
– Minimize energy management cognitive load
– Maximize ease of powering consumer electronics
– Solution: Wireless Power Transfer (WPT)
– WPT source-rich environment
– WPT power-scalable technology for CE products
– WPT user experience, applications and services
Wireless charging in the home
wireless charging in the office
wireless charging in the car
wireless charging on the go
Why the market is interesting
Source: IHS, March 2014
0
2
4
6
8
10
2012 2013 2014 2015 2016 2017 2018
Reven
ues (
$B
)
World Market Revenue
Assumptions include
Multi-mode solutions
Major smartphone manufacturer(s) to adopt wireless charging of flagship product
Limited regulatory requirements
Broad ecosystem for wireless charging
– Mobile phones and tablets are the first and largest opportunity
– Wearable tech is a growth opportunity
0
500
1,000
2012 2013 2014 2015 2016 2017 2018
Wireless Power Receivers By Application (MU)
Mobile Phones Tablets Wearable Technology Others
Source: IHS, March 2014
Qi Integrated, Qi Ready
Wireless power today– More than 40 phones
Revolution Spectrum Nexus 4 Spectrum 2 Optimus 2 Thunderbolt Incredible 2 Rezound 8X Droid DNA
Lumia 810 Lumia 820 Lumia 822 Lumia 920 Droid Charge Galaxy S III Galaxy Note II Google/LG Nexus 4 Nexus 10 Nexus 7
Top Mobile Brands Offer Wireless Charging:
So…..Why Hasn’t Wireless Charging Really Taken Off?
50% Integrated in the phone
50% Integrated in back cover
Wireless charging Wish list
Air Transformer, Tightly Coupled
Inductive Technology
Loosely-coupled LC Resonant Circuits
Resonant Technology
Next generation of wireless charging
User advantages for Resonant technology
Characteristics
Standard
A4WP Resonant (Rezence)
WPC Inductive (Qi)
PMA Inductive
Operating Frequency 6.78 MHz 200 kHz 300 kHz
Transmitter Power 16 Watt 5 Watt 5 Watt
Receiver Power Range Wearable to laptop Phone Phone
Multi-receiver Support Yes No No
Enables Free Positioning Yes Limited No
Communication BLE
(Duplex)
In-band
(Simplex, Low BW)
In-band
tone only
Maximum Separation 50 mm 5 mm 5 mm
Can your charger do this?
Resonant technology will dominate from 2016 Multi-mode Solutions Will Drive Adoption and Interoperability from 2014 to 2017
0%
20%
40%
60%
80%
100%
120%
2012 2013 2014 2015 2016 2017 2018 Tightly Coupled Loosely Coupled
% P
rop
ort
ion
of
To
tal
Un
its
Sh
ipp
ed
Wireless Power Receivers By Range
Source: IHS, March 2014
Wireless power standards consolidation Specification A4WP PMA WPC
Inductive technology - PMA Qi
Resonant technology Rezence Working Group Working Group
Specification A4WP PMA WPC
Inductive technology PMA Qi
Resonant technology Rezence Resonant Transmitters
A4WP/PMA Liaison Agreement
A4WP Alliance Purpose, Vision & Mission
– Purpose – Create a wireless power transfer (WPT) ecosystem that delivers
spatial freedom
– Vision – Ubiquitous power based on non-radiative, near-field magnetic
resonance wireless power transfer
– Mission – Global standardization
– Certification and testing
– Regulatory compliance and policy
– A4WP is an industry standards body formed in 2012
– Rezence brand launched in late 2013
– 100+ member companies, high-impact board of directors:
– Automotive, carriers, consumer devices, components, furniture,
technology, test and certification
– Liaison Relationships: Bluetooth SIG, PMA, CCSA, BWF, TTA
Quick Facts
100+ MEMBERS
As of June 18, 2014
A4WP Membership
A4WP Recent News: The Path to Products
– Rezence brand launched
– Certification program and 1st certified products for smartphone
& cell phone use cases (BSS V1.2)
– Achieved BSS V1.3 alpha for tablet & laptop use cases
– Digital Trends Best in Show Finalist at CES ’14
– “Wearables” new work item launched (BSS V1.4)
– A4WP and Power Matters Alliance join forces
– Bluetooth SIG, China, Japan and Korea national standards
groups form liaison relationships with A4WP
– Plugfest #4, 21-25 April, 2014 60+ participants bringing 10+
Charger and 10+ Receiver designs for BSS V1.2 and V1.3
Top Five Finalist
Best in Show at CES
2014
A4WP BSS Work Plan
2013 2014 [Q3CY14] 2015 [Q1CY15]
Usage
Progression
Home, Business,
Automotive
Public Infrastructure &
Services Enhanced Services
Features Positional Freedom, 1:N, Bluetooth Smart Communications, Scalable Power
Specification(s) BSS* 1.2 [DONE] BSS 1.3 BSS 1.4
1:N PTU Power 10 – 16W 10 – ~50W ~1 – ~50W
PTU Devices (ex) Mats, Furniture, In-
Vehicle Accessories Furniture, PCs, In-Vehicle Consumer Electronics
PRU Power 3.5 – 6.5W 3.5 – 30W ~1 – ~30W
PRU Devices (ex) Smartphones Laptops, Tablets, Peripherals Consumer Electronics
Apps Power Management,
Location Social Media, Gaming
*Baseline System Specification (BSS)
Additional Information
A4WP website
www.rezence.com
www.a4wp.org
Video Demos
YouTube
Thank You
WPT Regulatory Considerations
– Categorization drives several key areas
– ISM (6.78 MHz) attractive
– Global availability (ITU-R)
– Unrestricted emissions (e.g., FCC Part 18)
– Emissions limits
– RF exposure
– Compliance to basic restrictions
– Current density (J)
– Induced electric field (E)
– Specific Absorption Rate (SAR)
WPT Regulatory Considerations
– Designing for Regulatory compliance
– Use cases
– To define quantitative coupled-coil descriptions (M, R1, R2, ω0)
– Equivalent circuits
– To derive key mathematical relationships for end-to-end circuit (or
at least subsystem-level) behavior, e.g., power transfer efficiency
– Constraining implementation choices in real circuits
– To establish a “design feedback loop” to evaluate implementation
choice on the basis of impact on end-to-end system performance
– Regulatory compliance assessment through experimentally-validated
simulation methods
WPT Regulatory Considerations
– Potentially applicable Regulations for WPT