19-03-2012, 01:12 PM
Delphi Wireless Charging System
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Delphi is developing a Wireless Charging System that will
automatically transfer power to a vehicle providing a convenient,
wireless energy transfer system. The system was developed in
cooperation with WiTricity Corp., a wireless energy transfer
technology provider. It will enable an electric vehicle's battery to be
recharged without the hassle of cords or connections. This handsfree
charging technology is based on highly resonant magnetic
coupling which transfers electric power over short distances
without physical contact, allowing for safer and more convenient
charging options for consumer and commercial electric vehicles.
The wireless technology is a product differentiator for advanced
technology vehicles. The high efficiency wireless energy transfer
technology will require no plugs or charging cords. Instead, a
magnetic field from a source resonator on the ground is aligned
with a capture resonator mounted underneath a vehicle.
Benefits
• Convenience and simplicity for electric vehicle owners
o Enables easy, automatic charging by simply parking a
vehicle in a garage or parking spot
System activates the moment a vehicle is
aligned with the charging pad
o Minimal driver action needed
Hands-free
• No plugs or charging cords needed
• Keeps clothing and hands away from
dirt and debris that accumulates on the
exterior of vehicle
• No loose charging cord to step over or
wind
• No need to plug in or unplug
• Simply drive into position and exit the
vehicle as usual
• Accommodates drivers with physical challenges
• Engineered to provide a safe, robust, reliable, and quick charge
o Safe technology
Non-radiative power transfer uses a magnetic near field
Very little energy transferred to extraneous or off-resonant objects
o More than 3,300 watts can be wirelessly transferred
Can fully charge an electric vehicle at a rate comparable to most residential plug-in chargers, which
can be as fast as 4 hours
o Weather resistant
Environmental factors such as snow or rain would have no effect on the wireless energy transfer
o Less vulnerable to tampering or accidental damage when compared to corded charging alternatives
o Low maintenance for commercial and public installations
No moving / mechanical parts
o Delphi is a member of the SAE J2954 Wireless Charging Task Force
Designs comprehend applicable safety regulations and guidelines
• Superior technology when compared to inductive charging
o Effective across larger air gaps, allowing for a greater vehicle ground clearance
System can transfer 3.3 KW efficiently across air gaps in excess of 20 cm
o Precise vehicle positioning is not required
Accommodates greater misalignment between vehicle resonator and stationary resonator, meaning
that perfect parking accuracy is not required
• Green technology
o Helps advance the establishment of a global infrastructure for electric vehicle charging
o Can help increase fuel economy of plug-in hybrids by increasing the frequency of having a fully charged
battery
Typical Applications
The Delphi Wireless Charging System can be used with fully electric vehicles (EVs).
Availability
The Delphi Wireless Charging System is currently under development. Contact Delphi for further
information.