I was in the car earlier, and there was a Tesla in front of me. It said Dual Motor. How do you drive on the fringe of two different electric motors? When you drive slowly, one electric motor kicks in, then, beyond a certain speed, the other motor clicks in and turns off the other motor. What happens when the low speed motor becomes inefficient at certain speed, but the high speed motor is too little to properly engage? I tried to think of this in terms of a carburetor at wide open throttle, it's not efficient at all. It runs way too rich. I know electric motors and carbs are completely different, but the same general idea is there, at least it should be. Electrical engineering wasn't my thing, lol.
Straight from the horse's mouth. The video is 4:34 in length but the answer comes in the first 2:20, approximately.
https://www.youtube.com/watch?v=TgmYZvsvRDw
How do you drive on the fringe of two different electric motors?
Seamlessly and fast.
I have a single motor EV, but I drove a dual motor one and it was excellent, each axle was producing the right amount of power and it drove great - like a good AWD system.
modern electric motor control tech is quite good.
a carburetor at wide open throttle, it's not efficient at all
Its an electric motor, the efficiency band is most of the rpm range.
Cursing at a speed, instead of one motor outputting 22kw, it’s two motors outputting 11kw.
It’s pretty mechanically simple.
Hmm. Good question. I conjecture it is similar but not exactly like a RAV4 AWD Hybrid.
There is an electric motor and ICE engine in the front wheels, and an electric motor for rear wheels.
Most of the time, the car will be powered by the front wheels. And hence the front electric motor and the ICE engine.
But when there needs to be a little more oomph, the rear wheels will kick in, and hence the rear electric motor.
The same logic can be applied to the Dual Motor Tesla, where one motor is used primarily for efficiency, and the other for primarily for performance. And IIRC, there is one set of motors in the front, and one in the back, for dual motor setups.
Otherwise, single motor is just RWD.
I thought they were based on high and low speeds, not more or less performance, I obviously don't drive Teslas, lol.
I always thought that one drives the front axle, and the other drives the rear.
if not, you could have a differential connecting them in parallel. (I think they call this a PTU on some hybrids)
I may be misconstruing this. Always thought one axle was different from the other, so they specialize in rotating in low speed, and the other rotates at high speed, but there's really only a few thousand RPMs between one motor and the other.
So, I was misconstruing it. There's one motor for each wheel, not two per wheel. For some reason, I thought there were two motors per wheel, I thought dual motors meant what it is at face value. I thought all wheels always had motors in them. That makes sense, now.
it's not one motor per wheel. It's one motor per axle like I thought, which automatically makes them AWD.
https://www.tesla.com/videos/tesla-unveils-dual-motor-and-autopilot
Yeah, that's what I meant. Goes to show that I know nothing about electric cars.