I know quite a few people here are running 13s systems, however all the motors I look at are only rated to 12s… High voltage ESCs are surely in the works, and will be available soon, but are there motors around that will support this?
The 13s man @deckoz should know
Motor voltage ratings are kind of useless because they can take a shit ton more volts then they are rated for
Got some science to back that up dude? I like to play it safe.
Voltage doesn’t kill motors. At 13s you will be pulling less amps. Your watts should remain the same. You should be fine with whatever motors you have rn.
More detailed explanation incomming from Brad… probably. Lol
Basically the weak spot when it comes to volts is the ESC. Motors are dumb and will take whatever you throw at them. I’m paraphrasing something I read on this forum
So if you work from the watt rating of the motor, and limit your settings to that, you could basically go whatever voltage you want?
All I want in 2020 is dependable 14s ESCs
Im thinking higher… like 20s.
I like your style! 20s3p
Think I just had a mini stroke imagining soldering all those series connections
Excellent knowledge. Cheers bro.
Can I see some torqueboards 6374s on 20S lmao.
We have been stuck on 12S for a minute.
@shaman take notes my friend
Did somebody say EUC battery?
Two rebuild flipshite 6354’s they run cooler on 13s. I tried a hobbyking esk8 160KV (Not recommended) . Pack is retired now it has ebay cells hg2 and they are degrading…
@deckoz This post pushed me over to deciding to make 13s8p 40t packs vs weak sauce 12s.
@klaus79856 gimme them 40ts
The new EUCs are 100v
Also, what produces torque is current, when spinning, the motor acts as a generator, that is the back EMF, you have to have enough battery voltage to overcome the back EMF and push the needed current through the windings
Since loses are mostly proportional to current, if you increase the voltage and increase the gearing to keep the same top speed, the efficiency on the motor will be higher since the current need for the same torque is lower, but you keep the same top speed
If you increase the voltage without changing anything, the efficiency gains occur only before the MOSFETs, so mostly the battery current is decrease and you have less heating loss in the cells
If you push the voltage up and also ride faster, obviously the system will be less efficient since you have greater drag all around and need more overall power to overcome it
Another thing to consider is that core loses are proportional to speed, so spinning the motor faster will produce more loses
@deckoz can confirm if all this really translate to real life riding
So motors doesn’t care about voltage until there is too much heat, or you go over the insulation rating of the wire, or the motor/bearings simply explode
Yeah that is where I am waiting for. It is really time to go for 20s… only problem is then the high DC voltage for battery builders like me.