How about some battery amp numbers? While the motor only sees phase amps, they're just for show. Battery amps are for go, because you can't turn anything into power unless even more power comes out of the battery. In addition, there's now way us common folks can measure phase amps, and there's multiple ways to quote them (eg peak limit or rms). You can bet your bottom dollar that Kelly, who's well know for inflated specs isn't talking about rms and peak is meaningless.Rovii wrote: ↑Jan 16 2018 2:06amWell as you can see in my signature I need 740m (around 20 seconds) for reaching 200,49 kph with the 400 phase amp controller but with 42S battery pack.
Now I will reduce the battery pack to 30S (25 Ah) but I will have up to 800 phase amps.
Ok my motor will not turn as fast as before but I hope to get up to 160 kph with much better acceleration!
But first let me build up my new design motorcycle!
For testing: Do you have an airplane field next to you?
Well I can test my vehicle at this area!
People are very interested in to see my motorcycle running (no noise, no combustion ...).
That´s the reason I can do it there.
I would bump that pack up to 30Ah, by adding ~10Ah of packs in the 1.5-2.5Ah range of the same series of high C-rate cell. This is just because while the 5Ah cells themselves handle the discharge pretty decently, the soldered busing and discharge lead solder joints tend to come un-soldered from them, hence using whatever is the smallest Ah super-high C-rate cell with the largest discharge leads. Should make the setup more reliable and improve your trap speed significantly from reduced sag.Rovii wrote: ↑Jan 17 2018 1:15amWell I am using Turnigy Heavy Duty 6S 5000mAh (60/120C).
I tested on battery with over 200A for short.
In my last setup I worked with 175V DC (fully charged) 20Ah.
So I think to have enough power for the short run.
You are right I only posted the numbers of Kelly´s data specification.
Now I bought me a measurement device which can measure up to 1500A AC/DC to check out which amps the Emsiso controller will give out and then I can compare it to my settings.
So let´s wait until I can start with testings.
BTW the hubmotor was foreseen for a bicycle not a heavy motorcycle. Therefore I will change later on back to mid drive system.
But also there I only want to play with only 125V DC not more! I alos know, that real drag bikes running @ 400-600V DC and around 2000A but that´s another league. So at the end of planning with my motorcycle I hopefully will reach the 200kW but that will take some years! Next year I want to start with the middrive system and this year I hopefully will have fun with the hubmotor.
I think a controller might still be a good idea, limiting the current to a motors maximum saturated torque output has zero loss in output and would make the pass faster further down the line from less current draw, sag and heat through the whole system.SlowCo wrote: ↑Jan 26 2018 8:28amIt seems you have enough room on top of the swing arm just in front of the rear tire to add a "mid"drive motor with a chain to the hub motor. That motor would also put some extra weight on the rear tire. A used motor and controller from a Zero motorcycle would be perfect. But even a 110V brushed motor with at least 10kW rating would be great. And with an additional brushed motor you wouldn't even need a controller just a contacter and a switch. This way you can keep your current set up and just "add on"
Rovii wrote: ↑Jan 26 2018 6:37amHey Luke,
thanks for this information but for this year I have finished my plans regarding battery box and battery types.
But for autumn I will take your information into consideration.
There are only 2,2Ah packages with 4S.
Maybe I have to reduce the max voltage than to 28S!
Now I am playing with 5x6S, where I want to charge the 5th package only to 4,1 V/cell that I do not reach the max voltage of 125V.
I hope to get it running within the next 4 weeks and want to start the first tests in March/April.
I also know that everybody who will see this bike expect absolute top results but 14kW continuous power /34kW peak is too less for that motorcycle!
So next year I want to start with Emrax 228 and hope to get better results with this solution.
Maybe I will implement the hubmotor to my bicycle but actually I do not really know!
Well I think my English is to bad! I do not really understand it.