I don’t think this is right.
motor current depends on load. ie the motor will draw more current if it can’t hit the RPM targeted by the input voltage ( batt voltage x duty cycle ) until it hits that RPM or maxes out the battery current available.
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I was just trying to replicate a graph I saw before, I think it assumes that it is accelerating at max current and has the perfect load throughout that acceleration.
hmm. I think max acceleration would be battery amps flat across the whole graph. it’s not a function of duty cycle.
If you pulled maximum battery amps at 0.1 rpm though, due to the lack of BEMF from the motor you’d have to step the motor voltage WAY down (and the current WAY up to match), which would far exceed the motor current limit.
Basically at low speed you’re limited by motor current, and at high speed you’re limited by battery current.
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that’s right. thanks.
what about the curve at the end of the graph in the motor current line? shouldn’t that be linear?
Bump to my question from earlier: what’s the spacer size on 6x2 wheels? The one between the 2 bearings
The one whose name we dare not speak.
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Looking into comms systems for talking to one person while riding wearing helmets. I’ve heard of some people using their phones, lavalier mic and a regular phone call or some voice chat app. I like this idea because we wouldn’t need to push to talk (keep attention on riding) and comms is always active. Thoughts, ideas, product recommendations?
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Well I put the griptape in
Looks pretty good besides the fact that the wires are popping out, probably because they weren’t all the way down when doing the epoxy
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Hmm. I’m not following from that diagram.
what is your graph showing? watts for blue Y axis? amps for Red Y axis ? RPM on X axis.
I can’t seem to get to the paper you pulled that from.
Still not yet seeing what would make the response non linear on a plot motor amps / duty cycle given limit of max battery current. ie the original chart.
i don’t understand. 
So 80kg loaded weight on 8 inch pneumatics is too much too handle for dual Maytech 6374 motors? They should be beefy enough right?!
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Yea for sure, I’m 75ish Kg and have dual TB 6374s and they have plenty of power.
What gearing are you running?
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Maytech motors just suck as of lately
Is it the thermals which make them suck? Or just in general 
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72/16 or 4.5
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Im thinking the sealed design just traps the heat too much…
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One of the first steps I see in the battery building process is to measure individual cell voltages to find outliers. I believe that the person shipping the battery needs to drop them to 30% capacity before shipping.
If that’s the case, am I making a bet on the seller’s ability to uniformly discharge cells before shipping them to me? As due diligence, is there some sort of charge/discharge cycle I should run new cells through before looking for outliers (+/- voltage)?
You should be fine, I wouldn’t worry about it too much if you already have them.
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Kinda sad as the flipsky 6374s in a 10s config zoomed past me on a small hill😜
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