Electric bike with mid-drive and CVT

[Nikolay-UA]

Hi
For a long time I`m interesting in electric bikes.
For a few months ago I build for myself first bike with 1000w hub motor and 48v20ah battery. Everything ok when you drive on the smooth road, but climbing is a hell=)
So I decide to build bike with mid-drive with using cvt from gocart. Of course I know that it is not so easy but it is possible.
I already have gas gocart with cvt and I want to say that it is climb on 30% hill on no problem.

I want to use GoldenMotor HPM3000 and CVT
Battery pack will be 96v 30ah or 40ah li-ion cells.

Images I will add bit later how I think it will look like.

If somebody have information how better to build it, thanks for advice.

Thanks.
Nikolay

My current bike=)

 

[gwhy!1]

I would say if you can fit it all on the bike and get the cvt set well then it should work well. My only suggestion/concern would be that the max rpm of the GM motor at the voltage that you are going to use only comes in at approx 5krpm ( i think ) and i think you may have problems getting the cvt to throw its weights out fully at this max rpm of the motor.

 

[Nikolay-UA]

Hi
Thanks for reply.
That cvt fully open on 3000rpm.
About motor and controller, does golden motor good enough? Or maybe choose something else?
And I don't know what continuous power can give me hpm3000 motor
Thanks
Nikolay

 

[gwhy!1]

in that case it should be fine, but you still may have to tune the cvt to get the most out of it . I know very little about the gm motors but i do know 3kw through a cvt will be good power for a bicycle

 

[Nikolay-UA]

Yep I think it will be really funny
I want to push from GM 8000w but don't know how long it will work))))

 

[panurge]

I think the main problem should be to use a centrifugal clutch, engineered to cope the torque curve of a gas engine and to engage (and be tuned) for the right RPM range, accordingly to that curve, with an electric motor.....
Than you should anyway stay inside the rating limits of the transmission (in terms of torque and power)...while the clutch is engaged.
Even the clutch alone could be useful for some Systems....Indeed, finding a proper centrifugal clutch to be used on the driven pulley of my DaVinci instead of the slipper clutch, or at the drive output, would mean to avoid the freewheel at the drive output, the slipper clutch itself, and allowing to use an Idling feature for the motor, that is very helpful for Amp throttle modes and sensorless systems.
Looking for the options, the gocart's clutches sure seems among the better in terms of operating rates, but, nothing available seems to withstand the power and torque rates of my system, if not heavy, expensive and big....
Look forward to see your efforts on that.....

 

[wineboyrider]

There are some older threads of Es'rs building mopeds and topics about CVT....