Rumored 130 kWh Model S in light of Roadster announcement

[Krash]

I think the obvious way to know the permanant magnet motors handle heat better is that they are significantly more efficient. Inefficiency = heat.

 

[Zorg]

Permanent magnets lose their power when overheated but can be remagnetised. Will be interesting to see how this will play out in the long run.

 

[bambam4171]

One only needs to cool the bits that have wiring that gets hot and I guess the point is that the rotor in an induction motor is extremely difficult to cool where the stator in an permanent magnet motor is very easy to cool.

 

[Luontohippi]

Welcome to the Forum! I hate to be negative on your very first post but I don't have any idea why the physics would make any difference between the permanent magnet and induction Motors. And, the Model S really doesn't have any problems with the motors. The problems have been with the gearbox and other pieces like that.

In induction motors there's a current flow also in the rotor...right? I'm more confused about the fact that in one of their videos Electric GT said that it was the stator that overheats.

 

[Zorg]

In induction motors there's a current flow also in the rotor...right? I'm more confused about the fact that in one of their videos Electric GT said that it was the stator that overheats.

Stator is where the power flows, right?

 

[bambam4171]

Stator is where the power flows, right?

With an induction the power flows both in the rotor and in the stator. The stator is however much easier to cool.

 

[The Duke]

In the industrial sector all this has been solved for decades. But it cost$$$. Tesla decided not to make a track car with the S.
Hydrogen-cooled turbo generator - Wikipedia