Brofessional
Well-Known Member
- Joined
- Apr 19, 2021
- Threads
- 0
- Messages
- 143
- Reaction score
- 330
- Location
- Midwest
- Vehicles
- 22 GR86, 12 Accord, 18 Yukon, 21 Mach E GT
As much as I appreciate the "traction" this is getting, the dude obviously doesn't know what he's talking about with field weakening being the reason torque falls off.https://www.thedrive.com/news/42393...-puzzled-by-low-trap-speeds-at-the-drag-strip
we made it to the news!!!!
HP = (torque x RPM)/5252
So if you keep power constant (which just happens to be doable in an electric motor in part because of field weakening) what the F does does this clown THINK is going to happen to torque as RPMs increase? The thing could run on GD unicorn farts and it would see the exact same linear reduction in torque as RPMs increased provided power was held constant.
Not only that, but MANUFACTURERS LITERALLY GIVE YOU THE CONSTANT POWER NUMBER. So we can mathematically calculate exactly what the torque will be at any given RPM, and we can also incorporate vehicle weight, drive ratios, and tire diameter to calculate--and I cannot stress this enough--WHAT THE ACCELERATION SHOULD BE AT ANY GIVEN RPM.
However, there are limitations as to the range of rpms over which weakening can be used to keep back EMF at its limit and thus provide constant power, so eventually power starts to fall off. THAT is where you start to get separation of EVs as they don't adhere to simple equations any longer, and it is currently where we find ourselves with the mach e's performance vs the competition.
All these posts/articles/journalists talking about flux and how "torque just falls off" and "needs an induction motor" or a "2nd gear" or whatever other shit spills out of their brains. JFC the education system in this country sucks.
I'm gonna sit down now.
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