Electric Cars Charged While Driving

  • Author: Marek Czykanski
  • Published: 17 June 2017
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Nature/Nature Publishing Group
thumbnail image: Electric Cars Charged While Driving

Electric cars charge themselves while driving through magnetic coils in the road. Such wireless charging units are already available. However, up to now, charging by induction only works when both objects are stationary. In order for the alternating magnetic field to generate current in the receiver coil, the frequency of both coils must be exactly matched. If the distance or angle change, the charging power is immediately reduced or even completely broken.


Shanhui Fan, Stanford University, CA, USA, and colleagues have modified the charge coil to automatically adjust the frequency of the magnetic field to the distance of the receiver coil. A voltage amplifier and a resistor coupled to it ensure effective transfer.


The researchers demonstrated that their system works with a prototype: They transferred power wirelessly to an LED, which was slowly moved past the charge coil. Normally, the brightness of the LED is dependent on the distance to the coil. In the experiment, the brightness always stays the same.


So far, the researchers have transferred only one milliwatt with their wireless charge system and also only to a moving object in a one meter radius. But they are confident that this can be significantly increased. They consider charging of electric cars with this technique quite feasible. Mobile devices such as smartphones could also benefit from their technology.


Article Views: 971

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH