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© All rights reserved by Wurth Electronics, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
WIRELESS POWER TRANSFER
Würth Elektronik eiSos GmbH
October, 2015
2JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Content
Applications
Technologies & Standards
Coil Specific Considerations
Würth Elektronik Products & Advantages
3JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Applications
4JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Application Areas besides Consumer Products
Industrial
Medical Technology
Furniture / Infrastructure
Automotive
WIRELESS POWER
C O N S O R T I U M
Cordless Kitchen
13 J
uly
2012
5
Power for
appliances
everywhere
6JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Technologies and Standards
7JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Rx
B Field
Rx
Rx
inductive power transfer resonant power transfer
Inductive and Resonant Coupling
Tx
B Field
Tx
B Field
B Field
Evanescent wave coupling
WIRELESS POWER
C O N S O R T I U M
Transmitter
Cp
Lp
+
-
Receiver
Inductive Wireless Power Transfer
Cd
Ls
Cs
C Rm
ModulationModulation
Cm
IpVp
Load
Power
9JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
The Power of Qi
How to get a Qi-certified product?
Product must fulfill the requirements of Qi low power
specification downloadable from
http://www.wirelesspowerconsortium.com
Part1: Interface definition (public)
Part2: Performance Requirements (for members only)
Part3: Compliance testing (for members only)
Product must be certified – Qi authorized
test labs are:
• TÜV Rheinland, Korea
• TÜV Rheinland, Taiwan
• CETECOM, Germany
• DLS electronic systems, USA
Product certification is available only to members of
the WPC.
10JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
11JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Coil specific considerations
12JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
The penetration depth δ can be described with
the following formula:
ρ specific resistance
ω angular frequency
µ sheared effective permeability (e.g.: 100)
Skin Effect
Source: en.wikipedia.org
13JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Proximity Effect
Source: electrical4us.com
The proximity effect causes current constriction or current displacement in
closely spaced conductors.
Source: itwissen.info
14JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Coupling factor / alignment tolerances
Good coupling and maximum energy transmission depends on
size of the effective area of the receiver coil in the magnetic field
the distance in the z direction
A coupling factor of 1 is ideal
15JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Improvement using ferromagnetic shielding
16JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
WE Products & Advantages
17JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Würth Elektronik Wireless Power Coils WE-WPCC
Fully compliant to WPC Qi standard
Efficiency up to 93%
Supreme shielding characteristics for low leakage
inductance
Outstanding performance due to usage of litz wire:
lowest RDC
highest Q values
18JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Structure of thin receiver coils
19JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
15 Transmitter Coils
15 Receiver Coils
WE Wireless Power Coils – 9/2015
http://katalog.we-online.de/en/pbs/browse/Power_Magnetics/Wireless_Power_Transmission
20JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
21JHant / CSo | Confidential | Wireless Power 2015
© All rights reserved by Würth Elektronik, also in the event of industrial property rights. All rights of disposal such as copying and redistribution rights with us. www.we-online.com
Thank you
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