grindz145
1 MW
so sick! Belt drive is so baller. So much more difficult to execute and it's awesome to see!
liveforphysics said:
No rear brake mounted yet, Jamie is still working on that. No battery or motor controller installed yet either, but that's the last things needed to rip!
Rix said:Sub'd! I see you got a schlumpf speed drive. Is that the 1-2.5 ratio overdrive unit?
The belt feels so nice to pedal compared to a chain, so smooth and back-lash free and silent.
Doctorbass said:Awsome bike my friend!
Once you will have taste the battery placed in that frame you will appreciate it alot i think. personally i have a ZF2.8 splited in half in one of my NYX and it weight about 43 pounds with wiring and breakers etc and the bike handling feel very nice.
Will you use try a Sevcon Gen 4.5 on it (770A phase?) the only insane controller that could fit under the frame or inside are like the $$$ TRITIUM WAVESCULPTOR etc..
Sevcon and other similar style shape controller are just not made to fit common ebike design...
Doc
liveforphysics said:Doctorbass said:Awsome bike my friend!
Once you will have taste the battery placed in that frame you will appreciate it alot i think. personally i have a ZF2.8 splited in half in one of my NYX and it weight about 43 pounds with wiring and breakers etc and the bike handling feel very nice.
Will you use try a Sevcon Gen 4.5 on it (770A phase?) the only insane controller that could fit under the frame or inside are like the $$$ TRITIUM WAVESCULPTOR etc..
Sevcon and other similar style shape controller are just not made to fit common ebike design...
Doc
Wave scluptor is ancient tech, there are non-sevcon options that fit inside the frame.
Doctorbass said:the only insane controller that could fit under the frame or inside are like the $$$ TRITIUM WAVESCULPTOR etc..
Sevcon and other similar style shape controller are just not made to fit common ebike design...
Doc
liveforphysics said:People a decade in the future with 10x better mosfets/ganfets/sicfets and 10x better solid state batteries and possible room temp superconductor windings and grain-oriented magnetic materials for motor cores will be laughing about the size and weight and hassles of making a 100mph hubmotor ebike in 2017.
liveforphysics said:My current options are private for now. I'm open to entertain whichever controller option gives me the highest 10sec burst phase current on a 69vdc peak battery that fits inside the frame and offers real torque control. That includes trying out random under-tested prototypes made by ES community as options. I'm in pretty good shape now so walk/pedal of shame events home unpowered are minimal burden if controllers magic-smoke-screen while riding.
The incumbent solution to beat does 650A RMS phase current for 10seconds, or ~225A continously and fits in the frame. If someone proposes me a solution that still fits and does more burst 10sec phase current and similar continously, I will be open to funding/supporting what it takes to make it happen.
liveforphysics said:My current options are private for now. I'm open to entertain whichever controller option gives me the highest 10sec burst phase current on a 69vdc peak battery that fits inside the frame and offers real torque control. That includes trying out random under-tested prototypes made by ES community as options. I'm in pretty good shape now so walk/pedal of shame events home unpowered are minimal burden if controllers magic-smoke-screen while riding.
The incumbent solution to beat does 650A RMS phase current for 10seconds, or ~225A continously and fits in the frame. If someone proposes me a solution that still fits and does more burst 10sec phase current and similar continously, I will be open to funding/supporting what it takes to make it happen.
steveo said:at 650 phase amps burst, i say 2-3 drag runs before you will feel motor saturation with no cooling installed.
will you be doing any cooling mods to the motor?, or you going to break in the winding a bit, then think about adding it later
Any hub motor i've tried will usually start to feel power loss around 100-120c.
Very cool build, well done luke, i wish you all the best with achieving your 650phase amp ebike build!
Oh and i forgot to add, is price a concern with the controller your looking for, i think the one doc is recommending is like 4500$ USD
liveforphysics said:I should also add, it's going to have a fast 1/4mile time and a high top speed but if it overheats from those things in a single run, that's fine with me, as I built it for riding single-track, and the power demands will be so much less off road it shouldn't have any thermal concerns. If it does have thermal drama off-road, FF and hubsinks should meaningfully help.