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You know what's funny...
These things have come up plenty over the years (at least the eBay E-RAM types) and been discussed and dismissed.
But after the Subaru BRZ came out a company actually developed a real, working one to "fill-in" some of the dips in that engine's torque curve, and it works...
The main problem with this type of machine is the power requirement - a conventional mechanical supercharger can take 50 HP to run at a decent boost/flow level. Turn that into kW for electrical purposes and the amps required are insane for a 12v system.
But if you can step up the voltage the amps fall off quite a lot...making it more practical.
...The main problem with this type of machine is the power requirement - a conventional mechanical supercharger can take 50 HP to run at a decent boost/flow level. Turn that into kW for electrical purposes and the amps required are insane for a 12v system...
The lower power requirements for these newer type swtched reluctance motors offer some hope in that respect, plus they have lower internal losses due to no brushes or commutator so a solid state device.
I know nothing, but would speculate the tech has come a lot in the last 10 years. I mean look at the Tesla and the torque, granted that is a big motor in there. Also if you get to the point of adding batteries and weight, diminishing returns?
That is the beauty of a turbo, simpler, less parts to fail and not much weight added to the overall package. I was reading about Lidar the other day, a portable unit cost 15,000$ when google started experimenting 5 years ago. Now they are under 700$.
These guys got 1kw increase in power with the dual forced induction Ryobi system.
According to a recent source on this..It seems that they are using a super capacitor(s) to run these..The voltage delivery is instantaneous, and the battery cannot deliver the power the 'charger needs to spin things up fast enough. some people have been running a second alternator to keep the capacitor charged..wonder if it's 24 volts? Possibly, since 12 may not have the mojo to handle it..I think the article was in Road and Track or Car and driver .....Google electric superchargers....Volvo seems to be running their turbos with an electric motor in addition to the exhaust stream..
I went to the LA Auto Show this year, and there I saw a production engine which had an electric supercharger on it. I can't remember who made the engine, it might have been Honda, or Mercedes. It was a true electric supercharger - just an air pump running on electricity, and I think it was in tandem with another blower (supercharger or turbo, I forget, there was so much to see that day).
I tried a web search and found these articles which state that an electric supercharger (marketed as an electric turbocharger) will soon be seen on production cars, running at 48 volts. Though maybe they're talking about turbochargers that also have an electric element to them, so help them spool up faster, and generate some electricity when cruising. http://www.autonews.com/article/2014...lag-valeo-says http://www.autoblog.com/2015/06/12/m...argers-report/
I think that volvo is using some of these on their cars to get past the turbo lag problem....also by running smaller turbos and more of them, there is less lag time because the smaller turbines have less weight and mass and spool up faster. Seems that some of the speed boys who are confined to straight six engines, are running one for every two cylinders...3 turbos...
Here's an informative blog that talks about the development of an electric supercharger kit on the new MX5. Note that it uses 3 mini batteries and a high power controller. Average gains are +40HP and +40TQ.
The compressor wheel actually looks like a wheel from a real turbo. http://www.openflashtablet.com/esc-development/
12-23-2016, 12:30 PM
Electric Supercharger
