First I just want to say if I got any facts wrong please feel free to correct what I said.
So I’ve been meaning to start this for awhile now. With the new Stormcore 100D and Rion Tronic coming out a lot of people are moving to higher voltage. What we are missing is a motor that’s not a crazy low kv (90kv Maytech) but also supports the amperages we want.
So back story on why you might want to run higher voltage on your board.
The main thing (in my mind) is more speed without a decrease in torque. We all know upping your gearing so you can hit higher speeds makes your torque drop away. Higher voltage solves that by adding speed by putting more volts into the motor making it spin faster at the same gearing.
Another reason to go higher voltage is the torque. 16s 100amps per motor will be more torque then 12s 100 amps per motor. This is a big thing if you live in a hilly area or just love torque and take offs.
Finally, efficiency. The higher the voltage the more range you will get. A 13s4p battery will get more range then a 12s4p battery, if the same cells are used and you were to ride both batteries the exact same. For example (hypothetical so not true but gets the point across) A 13s battery at 60amps will feel the same torque (if geared for the same top speed) as a matching 12s battery with 70amps being used. This means the 13s uses less power to reach the same torque and top speeds as the 12s battery which leads to a better mpg aka wh/mi or wh/km.
Alright, on to the real point
So here’s the real point. We don’t have motors that can do these voltages. Alright yes we have motors built for cars like Nissan Leafs and Tesla’s, but those don’t fit our application.
Really speaking, we can’t get those motors we want without buying in a large quantity.
For example I was all set to do a KDE Motor Groupbuy (suppliers of Hoyt motors) for custom made 63100 25s 250a rated motors. These would’ve been the bees knees, but they cost $386 dollars per motor. Now you might be saying, “Hey that’s pricy but if it lives up to its expectations then why not?” Well I’ll tell you why.
KDE wants $2250 as payment for the custom motor design and tooling etc. This means that if we bought 20 motors (10 sets) it would cost $498.5 per motor excluding shipping. If we sold/bought 24 sets (48 motors) it would cost
~$438 per motor. In my head I knew that personally, I’d sell stuff and I’d buy 2-4 motors at that cost. But I knew that seriously speaking, we wouldn’t make up that other 44-46 motors.
The point of this thread was so that we could help each other and try to find or have made a motor that fits all our high voltage needs.
Big shoutout to @ahrav for proofreading this mess of words