Power Distribution Architecture and a Transmitter Power Supply for a Dynamic Inductive Wireless Power Transfer

USU faculty have developed a novel method of dynamic wireless power transfer for the use of electric vehicles using constant DC current distribution in an architecture that includes an energy storage and a solar array connecting inductive charging coils to the grid. 

Problem

With a world that is looking toward new, safer, and more ecofriendly methods of transportation, the need for high functioning electric vehicles becomes ever more prevalent. Drawbacks in functionality have limited the implementation of these vehicles due to their limited range, large charge times and expensive initial cost. One of the most expensive parts of these vehicles is the cost. Many companies have looked at improving the batteries to make them more efficient and cost effective which has proved a challenging obstacle. Others have considered implementing the use of dynamic wireless charging coils under the road, but these coils need to be connected to a power source.

Constant DC voltage is currently used for dynamic wireless charging, which requires a high stepdown inverter for each coil. The inverter also induces a higher current in the cable which introduces more loss and voltage drop along the cable.

Solution

This technology would reduce range limitations and would also relinquish drivers of the need to wait while the vehicle is charging. With such limitations removed, the need for large, expensive batteries would also be reduced, since the charge would be constantly replenished while driving. 

These inductive coils that dynamically and wireless charge these vehicles are connected to an energy grid through roadside converters connected to an energy storage and a solar array. The energy storage and solar array helps stabilize the system, helping avoid grid peaks and reducing operation costs.

Benefits

This technology would allow for an efficient and cost-effective way to provide underground, inductive charging coils power from the grid. The constant DC current would also provide more stability in pulling power from the grid and applying it to the coils.

Applications

The inductive coils would be placed under the road, out of sight and not taking up a large area such as a gas station. The applications are obvious relating to the ability to charge an electric vehicle while traveling, allowing for larger transportation ranges.

Contact

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Questions about this technology including licensing availability can be directed to:

Alan Edwards, MA, JD
Manager, Technology Transfer Services
(435) 797-2328 alan.edwards@usu.edu

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USU ID C17034