I just ran a bunch of these tests with different lubricants. I have a 3turn 3220, a few hundred miles on it (30+ hrs). The CA is reading ~130W for the motor alone, no gearbox, just sitting in my hand (brand new is about 70W IIRC). With the Nabtesco RE0 grease, a good loading of it (25mL+), at 55V (all measurements are via CA, 225kV x 54V is 12,150 RPM) full speed the brand new unit reads 350W on the CA (via battery shunt measurement). So I was wrong, a gearbox with 4 miles on it needs 200W
dtx said:25R has a max continous discharge current of 20A so with a 5p config you can get up to 100A continous and even more for a few seconds. Since the 3000w kit uses the 80A controller iirc you are fine cell wise. Problem seems to be the BMS. Afaik Em3Ev has 40A continous, 80A peak for a short while. That's likely going to be the bottleneck.
dtx said:> So what, no battery exists for this kit?
Sure you could use the Em3Ev kit and it'll probably be fine just dont expect more then the 40A contionus with peaks in the 80s. Or go for LIPO with all the ceveats or maybe talk to paul at em3Ev maybe he can make a battery that has an output without BMS and you only use it for charging convenience.
tangentdave said:EM3EV does make nice packs- I've been trying to talk them into a larger BMS for us, but they're dragging their feet.
Unread post by totolito » Tue Jan 16, 2018 2:21 am
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So what, no battery exists for this kit?
tangentdave said:Fancy graphics, very helpful actually. The 3220 unit will turn the crankset at 350-375RPM under load. Multiply that by your front chainring count, then divide by the tooth count of the rear cog(s), then divide again by 13 to convert a 26" wheel RPM into mph. 30-35mph is a great performance sweet spot for 6kW off-road.