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M Le Page, Parking charge, NewScientist, 16 February 2019, p 22

In Germany, work by companies such as Qualcomm and Witricity in wireless electric charging for cars has been trialled in Berlin. The system comprises a coil in a pad beneath the vehicle that generates a charging magnetic field. A second coil within the vehicle resonates with this field, inducing an alternating current that is converted to direct current to charge the battery. The system can work in reverse to feed the grid, and works even at coil distances of 25 cm. Problems of costing and effects on metal or living tissue in the gap remain to be solved. The charging plate may be located in private garages, public car parks, or in roads for charging en route, as is done with South Korea’s buses. 

Abstract details


Journal title: Aviation Week & Space Technology

Keywords: 4 Propulsion - 4.2 Battery-electric vehicles

Subjects: Road transport, Electric vehicles

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