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Yep, like F1 but this is actually better. I think in F1 they want to use the secondary turbine after the first turbine which is directly hooked up to the compressor.
If the entire system is electric, then transient response is no longer much of an issue because you can "borrow" energy from the battery and stuff, so you can fit a bigger turbine which causes low backpressure, and then use shaft power to supplement the supercharger if the turbo isn't up to speed.
Basically, in your typical turbocharged car the turbine is the biggest compromise. The turbine can't overpower the compressor, despite there being a huge excess of energy in the exhaust, so it blows most of that energy by. Since turbines operate best near their maximum speed, the turbine is not attached to the engine, but this creates a transient response issue and thus the turbine housing intentionally creates some backpressure to give the compressor more power.
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