Whether people travel for leisure or work, the ultra-low emission vehicles are already in the market and increasing significantly. Days are not far when these vehicles will replace the existing or at-least will be used as common as normal vehicles.

The Project “Preparing the Strategic Road Network for electric vehicles “which was started 1 September 2013. According to highways England, the project is for a period of two year, which will end on this 30 September 2015. The main objective was to inform the UK highways authority about the feasibility of the Dynamic Wireless Power Transfer (DWPT) system on the highways.

“In the UK there is a con­tin­ued move towards the intro­duc­tion of wire­less charg­ing as an addi­tion to the Electric Vehicle (EV) plug in charg­ing infra­struc­ture in the UK. To sup­port this grow­ing mar­ket and infra­struc­ture for it, and gov­ern­ment pol­icy behind it, the Agency is inves­ti­gat­ing how the strate­gic road net­work could respond. The chal­lenge for the Agency is to test out the fea­si­bil­ity of an EV bat­tery charg­ing sys­tem that can oper­ate on the strate­gic road net­work. “

Mike Wilson Mike Wilson, Chief Highways Engineer added in the feasibility report.

“We are investigating how we can grow the electric vehicle charging infrastructure. Plug in charging points are already available at motorway service areas in England, and we have committed to extend this service by installing plug in charging points every twenty miles on the motorway network. The concept of wireless power transfer equipment installed under the road surface is seen as a potential opportunity to extend the charging infrastructure for our customers.”  

The basic idea was to install the DWPT systems both in the vehicle and on the road infrastructure and then charge the Electric vehicles with it. Details of the technical requirements of integrating DWPT systems with the vehicle, vehicle on-board storage and the road infrastructure are done in the feasibility report.

The various type of power transfer solutions are depicted in the picture.image4155

The primary circuits embedded in the roads are charged with the substations on the roadside. These substations receive charge from the main grid. The basic methodology is presented the following image.

Here are some assumed power values that will pass from the DWPT system to each vehicle type.

“It is assumed that the required power transfer level from a DWPT system on a motorway is around 20kW to 40kW per vehicle for cars and light vans, and between 100kW and 180kW for trucks and coaches, based on the power required to maintain constant motorway speed.”


Images credit:  Highways England 

Although this is a great idea and the feasibility report shows all the details of the components, its installation and working but the total improvement in energy efficiency and running cost using such a system is seriously required to be further explored in detail before considering it for installation in different vehicle types.