Was just wondering if electric motor powered 'chargers exist and if not- why not?

My suspicion is that they may take as long to spin up as a turbo but without the benefit of being powered 'for free' as it were from exhaust gases.

Thoughts?

Cheers,

James

I think the issue is getting enough force from the motor without drawing huge amounts of current.

Yep...you would need such a big alternator to supply the current you may as well just drive the blower directly and save the coversion inefficiencies...

... and the weight of the big alternator and motor (just pulleys)

I thought an electric blower would be controllable by an ECU, but I suppose that a hydraulic clutch activated by a servo would be just as good if not better

you can buy an electrec turbo called a turbozet

http://www.turbozet.com/


supposedly total crap


atb

steve

so is an electric turbo better than an electric supercharger!!!!!

i know, there should be no difference.

would an electric turbo still have a turbine in the exhaust? hence would it be an antilag device? and would a leccy super use the motor to help turn the crank too?!

effectively the turbozet isnt a turbo, as its not exhaust driven.

It woukld melt as its plastic.

If you think about it, can you see a little lekky motor being able to compress air at a volume of approx 2 litres per 2x crank revs at 6,000 rpm to approx 8 - 15 psi?

I cant.....

atb

steve

We had a little thread on this subject before...

thready

a whole 1psi!

I wonder if an engine driven fan (the one that would have cooled the rad normally) could be boxed in and used..... it could have a 'waste gate' to divert any flow thats not needed, so its effectively always on, but bled away when not needed.

atb

steve

There was a fellow on the Dodge Dakota forum who was experimenting with providing boost from the output end of a two-cycle leaf blower (if you have such things over there).

If I remember correctly, it was constant speed producing constant pressure rather than variable according to load so it added a high-pitched bagpipe-like drone to the vehicle engine's song.

Don't know if he ever finished it or if it remained in the prototype stage.

Hmmmm, all this sounds decidedly smelly of something unpleasant!!

A typical supercharger on a typical 2.0 litre engine running at typical peak rpm will typically (like that word) draw about 15bhp from the engine that it is feeding at typical (10 -12psi) boost levels, that's a heck of a big 12v dc motor!!!!

As an interesting aside, a top-fuel dragster at 8000rpm uses approximately 250-300 bhp to drive it's supercharger!! (mind you the engine in making circa 7000bhp so it's not too bad!!)

Why cannot you use a turbo impellor to drive an alternator - no losses when your lights are on etc

It would cost to much,£600 ish for a turbo type thing for a couple of bhp.