Wireless Power Transfer Applications
Transcript of Wireless Power Transfer Applications
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WIRELESS POWER TRANSFER
Würth Elektronik eiSos GmbH
October, 2015
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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
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Applications
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Application Areas besides Consumer Products
Industrial
Medical Technology
Furniture / Infrastructure
Automotive
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WIRELESS POWER
C O N S O R T I U M
Cordless Kitchen
13 J
uly
2012
5
Power for
appliances
everywhere
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Technologies and Standards
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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
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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
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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.
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Coil specific considerations
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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
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Proximity Effect
Source: electrical4us.com
The proximity effect causes current constriction or current displacement in
closely spaced conductors.
Source: itwissen.info
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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
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Improvement using ferromagnetic shielding
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WE Products & Advantages
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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
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Structure of thin receiver coils
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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
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Thank you