Generally speaking for the size and power range of EV motors, I'd give AC about 2 or 3% advantage over DC. And then maybe a percent or so is given back in the AC controller versus the DC counterpart.
Towards the higher power end of the EV range, AC drives will run higher voltage systems like 300V batteries. There are some AC drives available now in the lower to medium power range rated for about 100V batteries.
Yet I hear that induction motors win the efficiency contest with PMs at light loads because they have control of the field. And you trade the mechanical commutation for electronic commutation in the AC-DC argument or in other words; replace carbon switches with silicon switches. So it is a tradeoff of efficiency, durability, cost and which type you are offering for sale, isn't it
har har, that must be why I listed several downsides of each motor type, including magnet motors, right? The question is which is most efficient. I provided the correct answer.
You got me wrong. I did not say I favored any particular motor type nor am I out to prove anything here. I simply was pointing out you made a statement which is erroneous in the eyes of many experienced people in the field.
And the correct terminology to encompass all those motors would be simply PM meaning Permanent Magnet and it is understood that it is a PM field with a wound armature.
I got to wonder where your curve came from ruckus. It reminds me of something someone would just draw off the top of their head. I've tested motors and drawn motor curves and looked at motor curves many times, and that one just ain't right.
The Leaf and Prius both use AC drives. Certainly not DC series motors
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