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## Main Question or Discussion Point

Sorry for the title, and sorry if there is already a thread on it.

This induction charger for a public transport bus. Can anyone break it down into basic formulas of high school physics. The air gap is frikkin huge. Earlier prototypes apparently had a secondary coil on the bus that was lowered but the bus drivers refused to be bothered to lower it according to internet myth.

This model I think has a fixed 10inch air gap.

That must be a huge coil/s and currents if a simple transformer equation is used.

Appreciate some detail of this design, what currents, coils, number of windings, losses etc in basic equations.

Thanks in advance.

http://www.wired.com/2012/12/induction-charging-bus/

This induction charger for a public transport bus. Can anyone break it down into basic formulas of high school physics. The air gap is frikkin huge. Earlier prototypes apparently had a secondary coil on the bus that was lowered but the bus drivers refused to be bothered to lower it according to internet myth.

This model I think has a fixed 10inch air gap.

That must be a huge coil/s and currents if a simple transformer equation is used.

Appreciate some detail of this design, what currents, coils, number of windings, losses etc in basic equations.

Thanks in advance.

http://www.wired.com/2012/12/induction-charging-bus/