GhostSkater
Member
A big part of that is that all permanent magnets (AFAIK) motors Tesla uses are a hybrid permanent magnets and reluctance motor, so at high torque it's a PM motors, but at low torque such as highway cruising, it operates as a reluctance motorBut Tesla doesn't do that. I take a wild guess and state that Tesla's motor, what with a larger cross-sectional surface area to conductor area, doesn't have issues at high RPMs - and therefore doesn't need the extra expense, losses, and weight of a no-kidding gear shifting transmission.
This doesn't chance much the losses on the windings, but changes a lot the core losses on the stator since the flux goes down and so does the Eddie and Hysteresis losses