Weight will help with efficiency. If you got to tow around less weight, you can go for longer.
Comment on 28-pound electric motor delivers 1000 horsepower
Honytawk@feddit.nl 1 week ago
The size is less of an issue than the power usage.
Does it also use 1000% more power to get that strength?
The only real benefit in that case would be robot mech suits.
YiddishMcSquidish@lemmy.today 1 week ago
Malfeasant@lemmy.world 1 week ago
The weight of the motor is insignificant compared to that of the batteries.
YiddishMcSquidish@lemmy.today 1 week ago
True
boonhet@sopuli.xyz 1 week ago
I’m assuming the efficiency is similar to other electric motors. Maybe not the best, but likely acceptable. If it’s not, the product is DOA.
If my assumption holds true, it would allow for lighter cars and better packaging by making even more room for the battery near the bottom of the car since these engines are so small, you could easily just use one per driven wheel and forget about differentials and such. And hybrids that put the motor in a ZF 8HP transmission could have wayyyyy more power available from the electric bit, as space is sorta constrained there.
I think trains could also benefit from a weight loss IF these are durable enough. They have multiple motors usually.
Weight is important in vehicles not just because of energy efficiency, but because the more sprung mass you have, the more work the suspension needs to do. And unsprung mass is even worse, so ideally your motors are sprung mass. Currently weight is still a bit of an issue for EVs due to the batteries, but if they can make up for it a bit by having super light weight motors, the difference between EV weight and ICE weight becomes smaller. Weight is also super important to road wear, I think it is by 4th power. So 20% heavier means twice as much wear already.