Quote:
Originally Posted by oil pan 4
There are lots of permanent magnet free motors out there.
They're fine if you want an electric vehicle that operates at a fraction of the power of my 2011 Nissan leaf.
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Actually a magnet free motor can be wound/designed for far more power per pound than a permanent magnet motor
(Teslas early dual motor had an inefficient “power” motor and an efficient steady state motor)
But why would anyone want 8X% efficiency when you can have a steady high 90’s percentage efficiency?
Until they produce the power efficiency curve for his motor (from light to heavy load) I would say this is a nothing burger as nobody at this point is willing to sacrifice range to gain fewer precious metal content.
The only way I could see this work is if it allowed companies to miniaturize the steady state permanent magnet motor to be just large enough to motor along while having one of these motors as the acceleration motor, bolt them together inline.
The trouble is that this would destroy city efficiency which is the primary benefit of a decently designed EV. Unless hypermilers discover they can accelerate efficiently with less acceleration than a big rig.
There are already a few non Tesla “performance” EVs on the market that have this issue due to voltage and motor selection while the highway ratings stay similar to the Tesla version