Recent content by Builditgood

I'm practicing wheelies on a cyclone 3kw full sus that feels nicely balanced and with adequate power. Problem is the throttle is not accurate enough even though I upgraded it from the stock one. Controller isn't Bluetooth either. Any suggestions for a throttle and controller combination please ...

Brilliant explanation thanks Luke. So if I've understood it correctly the resistance of the windings is low so it is not a matter of the motor taking as much current as it needs but the controller cutting the supply when it reaches a preset limit. Based on the fact that the power of a system is...

Hi. A friend and me we're discussing which components govern which factors and arrived at the following. What do you folks think? The motor and it's windings have a certain resistance when cold and so draw a max current for a fixed voltage (e.g. plug a 1000W hub into a 50V battery and it will...

Thanks Marin. Has anyone tried hacking a gear sensor or ebrake cutoff into a controller? Just wondering if it is worth the bother. Thanks again

Hi Folks. Is it possible please to automatically cut the power when using a gng 2015 with an alfine 8 hub? Just trying to help preserve the hub's life a little. Thanks

thank you very much for your input. first off wesnewell it is a spot on call with regards matching the controller to the pack. i'm going for the 30q and a 40a controller to keep it well within limits. but then the question comes, is there a 40a controller that works better with the edge 3kw...

Hi, are some controllers better suited to some hubs and if so is it just experience that tells you what is a good match? I'm planning on putting a my edge 3000w with a 14s9p em3ev triangle pack and a ca3 with torque sensing bb. Would be nice to have regen braking but i'm concerned that it is...

Nice battery Wheazel. So the trick is to increase the number parallel of packs to get the max discharge of each cell down so that sag is negated. For lipos this appears the max discharge should be < 1/3 their c rating. I don't know if that's the same for 18650's etc.

Thanks ykick. Charge them up to the top it is then - minus maybe 50 millivolts for a factor of safety

I spoke to a mate who is into RC cars and he said there shouldn't be a problem using an under charged pack. There was no science to his answer though :?

Thanks Dogman Dan. I hear what you're saying and it is all invaluable advice that I've taken on board but please forgive me for pushing on this one point. You said "Charging to 4v,, that's just leaving too much capacity on the table for me. I already leave a lot of it on the table at the bottom...

many thanks all. it sounds like the way to design a lipo pack (so as to not over charge it and give it a better life expectancy) is to have the average cell charged to 4.15v off the charger. e.g 60v /4.15v = 14.46 cells. round it down to 14 cells so max pack voltage = 14*4.15v = 58.1v...

Thanks liveforphysics. I read somewhere that it is a good idea to put an extra cell in so the pack only ever gets charged to 90%. For example if you need a 14s build a 15s. The problem with this is it seems is that since the cells start off effectively partially discharged they are already...

Is it not a good idea to only charge them to 3.75v per cell

Thanks. I've got a controller that requires 50a continuous and 80a peak at 60v so have paired it with 16s1p 16ah multistar lipo pack that I'll charge to 60v (rather than its max of 70v) to hopefully give some extended life. The cells are rated at 10c continuous and 20c peak so my maths tells me...