Hi Guy's... Trying the same project off myself as I just bought an Insurance accident damaged BMW X 5 for £3K. The front end, engine, gearbox are totalled so got it really cheap !... With that, though of making it Electric.
4 In hub AC motors like those ?
Question I have is as well as driving the wheels, could they also drive a generator to help keep the batteries charged, after all every little helps ?
I was thinking on keeping the full electric pack, along with the alternator to somehow keep that side of things the same, thus being supplied by the 12v battery and the alternator keeping that topped up !
From reading, and it’s a lot ! I feel personally the in hub wheel motor is the best way forward. After that, it’s the battery pack ? then the generation side as I feel as much free energy you can muster is a must to help the batteries stay topped up the better, so at some point Super Capacitors are going to be introduced, maybe to trickle feed the battery pack too ? Then the In house charging to charge at home !
Any more ideas to pencil in….
Just a note that link was march 2011. I think they ran into heat problems if they ever got that far.
400 hp per wheel is 800 Hp. Not even the 40 ft converted bus uses that much HP going up a mountain grade, passing at highway speeds.
400 Hp = 298.4KW of energy. do the math on Batteries even at 765 Volts
There already using Ultra caps for Hybrid buses, for the first 10 sec start. These packs are about 3 ftX3ft by 5ft in size.
there is no free energy, only energy converted to one form or another. and each conversion you loose energy in heat.
Even Solar has to come from a big Hydrogen furnace in the sky. and it is burning out, though it be million of years.
Back to more practical things.
at most a Generator is 80-90% efficient, you still have lost power.
you have friction of mechanical parts,not to mention eddy currents.
with all that said, I am using Traction Motor (200KW) that are fluid cooled for 4 wheel drive direct drive (in the prototype stage, but no implemented yet) I have been using the same Traction motors for Generator and driving, my gear box for a few years, to get actual usage data. I am showing about a 40% usable power to the rear wheels, or about 80KW
it is not as efficient as if I left the Transmission in.
My goal is not to have a more efficient system, but one that can run off many power/ fuel sources.
The most recent actual example of long range is the Tesla, in cars. it is all electric you charge as you go.