85rotarypower

This could work for low boost applications. It looks well built. But if you would read the description of the product, the motor is a high speed type electomagnet motor. If I am not mistaken, some electric motors are capable of 20000 + rpm with the proper voltage. He also did say a power inverter might be needed for the unit to reach full potential.

bill Shurvinton

OEMS are working on these sort of designs, as you potentially get the best of several worlds: efficient boost on demand.

I have even seen cad drawings. However they are waiting for 42V electrics to come on stream, as you need at least 10HP to get good boost. 1HP is 750W to a first order, so 7.5KW. At 12V this is 625A...Or a lot.

purple82

The Rx-8 is getting an electric turbo.

d0 Luck

but why an electric turbo.. ?

turbos we have today are efficient already as they are free floating devices feeding off the (waste) exhuast energy/gases

so why this piece of machinery?

d0 Luck

also wouldn't that electric turbo be considered a parasitic device since it's going to use amperage from the alternator?

mazdaverx713b

iTrader: (91)

wouldn't use it. IMO, garbage. get a real turbocharger.

V8kilr

Well if the motor has anything like the same technology as r/c car motors then the rpm is possible.

Electric motor rpm is mostly determined by the number of windings and the gauge of the wire used.
Then you have the number in which they are paired.
Such as a single, double, triple, quad, quint (you get the point).
TO adjust the torque to power ratio then windings are doubled , tripled, and so on.


Other factors are brush style, commuter style, and tolerence in the windings.


A 27turn (stock class) r/c motor spins up around 17,000-37,000 rpm
http://www2.towerhobbies.com/cgi-bin...&I=LXAVJ2&P=ML

on the other end of the scale we have something as sick as this
http://www2.towerhobbies.com/cgi-bin...?&I=LXGCY1&P=7
or this D6 with flatwire technology
http://www2.towerhobbies.com/cgi-bin...?&I=LXFZG3&P=7

Take a guess at the rpm on that

These motors are probably not as small as you think either, although not big enough to drive a turbo my only point is that electric motor power shouldnt be under estimated, especially when it comes to insane amount of torque and rpm.

Here is a shot from my personal stash showing the size of the r/c motors


Kisby 19 turn hand wound acor dyno'd at 22,000 rpm



Orion 12 turn triple modified motor dyno'd at 42,000 rpm



in case your wondering which I run the answer is neither.


I get more run time out of my nitro

purple82

That's from the factory. It's supposed to be introduced at next year's Tokyo Auto Show. My guess is that they've chosen it because it's easier to control boost levels at any RPM, therefore easier to manipulate different parts of the power curve and the higher demands on the electrical system are offset by the lack of exhaust restriction compared to a TC or mechanical parasitic losses associated with a SC.

pimpncuba

electric superchargers are crap. no idea about turbos but the superchargers cost big $$$ and produce little results

Phiber Optik

iTrader: (2)

This is one of the more prominent problems with this system, there is no way to power this sort of motor without HUGE battery banks and large dual alternators.

With the car running (14.4v) you will need 521amps of current to produce 'good' boost, and that is for a split second at peak boost, not including spooling up to reach that point. Also that isn't factoring in the voltage drop that a motor like this will cause!

It isn't realistic in a enviorment such as an RX7 with a 55 amp alternator.

85rotarypower

There really is no such thing as an electric turbo. A turbo is run by exhaust gasses. A supercharger is run by a pulley and belt. There are the roots/whipple superchargers then there are the centrifugal superchargers which this electric "turbo" is based on. It is in reality an electric supercharger, not a turbo.