Geared/cooled/lubricated eBoost

C

cmoalem

Active member
While I was thinking over again where we meanwhile are, how many cliffs have been tackled by some of the forum members (not all fully successfully circumvented) and how much money and time has been sacrificed and trying to incorporate the culminated findings here into a different approach:
- reliable/silent/efficient geared SC
- belt drive system , torquey emotor with rpms close to crankshaft speeds
- electrical components which have been proven for so long under load (from golf carts e.g.)
(e.g. a rotrex C30/C38 mounted to a plate together with a small belt tensioner for a 6-8 rib belt, a 10-15k shaft rpm sensored emotor of the "bigger type", some golfcart controller, a 48 or 72V battery system, the right input pulley with the right emotor pulley)

I was digging more in regards to Rotrex and FOUND THIS:

Rotrex has it done! Electrical (for "fuel cell applications") Superchargers/(compressors) ... 👹

rotrex-fuel-cell-compressor.com

Rotrex | Fuel Cell Compressors - efficient air for your cathode

Fuel Cell Compressors by Rotrex are designed to supply clean, non-pulsing air to the cathode side of a fuel cell stack - contact us today
rotrex-fuel-cell-compressor.com rotrex-fuel-cell-compressor.com

Brushless(/and slotless??) DC emotor rotor "on the geared input shaft" directly!
(yes ... heavy, overbuilt, and for HIGH VOLTAGE DC ... but the industry is getting there)

Now ... Rotrex has a custom section and does very well experiment "out of the box".

Does anyone here have a contact to their "kitchen"?
 
Last edited:
but back to your plan aren't Rotrex's VERY expensive.... and also why bother E turboing it . why not just connect it to the crank?
 
yes ... of course they are trying to return their R&D investment as quickly as possible ... fascinating is though: they are using gearing, lubrication, cooling and have engineered the emotor directly into the inputshaft. We are trying to get there DIY ... and can learn a thing or two from their designs ...

btw ... Rotrex is not the only one dishing out electrical fuel cell compressors ... Garrett e.g. is too.

A google about "fuel cell compressors" opens up a whole new world!
 
MkngStffAwesome said:
but back to your plan aren't Rotrex's VERY expensive.... and also why bother E turboing it . why not just connect it to the crank?
Click to expand...
The cost for a geared Rotrex (standard) SC is relative ... if you can drive it with proven and cheaper golf cart electrics/electronics!

NOT driving it from the crank gives you "variable boost" and a completely decoupled (from engine rpm) control ... and quicker spool up!

(BTW ... eBoosting is NOT cheaper than any of the engine driven kits out there ... it is more fascinating, hopefully(!) lighter(???), and gives you a completely new dimesion of control)
 
here a cool configuration:

theecharger.com

New Compressor and Electric Motors

From the data collected so far, I now have a accurate mathematical model for calculating the required mechanical power, electrical power, and motor voltage/current to turn a centrifugal compressor …
theecharger.com

and some more porn:
theecharger.com

Finished Product Version 2

Finished product after major upgrade. Now to test and check the prerformance.
theecharger.com

Anyone knows this guy? would be surely an enrichment here!
 
cmoalem said:
(BTW ... eBoosting is NOT cheaper than any of the engine driven kits out there ... it is more fascinating, hopefully(!) lighter(???), and gives you a completely new dimesion of control)
Click to expand...

Um well in my opinion a E-turbo has to be cheaper than a real SC or Turbo.. otherwise id rather have one of those that can run 100% of the time.

What is cheaper is relative though.... I see these guys that can do anything themselves and then turboing is cheap/ Cheaper than buying Eclectic motors / ESC .. batteries.. For me I'd have to pay some one to do a real SC/Turbo and thus it is expensive to do real Turboing it VS a E-turbo which i think i can do most of it.
 
That fuel cell compressor is a great find; as for the other guy - he's been screwing around with lower power setups for a while now, but I didn't know he was stepping things up. Using twin motors/ESCs is an awesome idea. Frankly, I didn't know that would work. And his fab skills are pretty damn good too. We should get him to sign up...
 
AlexLTDLX said:
That fuel cell compressor is a great find; as for the other guy - he's been screwing around with lower power setups for a while now, but I didn't know he was stepping things up. Using twin motors/ESCs is an awesome idea. Frankly, I didn't know that would work. And his fab skills are pretty damn good too. We should get him to sign up...
Click to expand...
... and he must have solved the problem of coupling the two outrunners nicely!

(not sure I like the final claw/cushdrive for the compressor input side yet ... but maybe it IS viable)
 
You must log in or register to reply here.
Top