RE:RE:RE:RE:RE:Good Post from (Xronly) "Tesla is one of the very few EV manufacturers that hasn’t used a permanent magnet motor design until recently. Again, it’s a matter of what makes the most sense when all factors are considered.
What motor will give the lowest cost, be the most efficient, and deliver the best performance? Until recently, Tesla’s answer to those questions was the AC induction motor. Induction motors tend to be less expensive than their permanent magnet counterparts, often due to the extra cost of the magnets. AC induction motors also historically function better than permanent magnet motors at higher speeds in both efficiency and load capacity.
However, advances in permanent magnet motor technology have allowed these designs to reach an efficiency and performance level that makes them preferable in many instances to AC induction motors."
https://www.findmyelectric.com/blog/tesla-pmsr-motor-raven-explained/