Depends entirely on the winding speed. If you are building a motor with 50Nm of torque when you know the top speed is restricted to 15mph why would you wind it any faster? Suntour have a 28mph 48V motor called E45 for faster bikes.
I would say that but on a full battery it gives up just shy of 17mph and on empty it's the same behavior until it gets too low to function. If it were just windings there would be a difference in speed in different charge states. I can't reliably test speed with the sensor blocked but now I'm used to the new tyres I guess it's the same. Placebo effect probably. There is a regulator in there for sure probably set to throttle down as the rpm increasesI still think it's maxed out on winding speed.
That's something I like about my bike, because the is no "limit" on the speed the motor keeps going until its just not providing any more assistance. Its a very gradual tailing off of the power. You can still feel it helping a little at 20mph, at 21mph it's almost imperceptible and at 22mph you on your own.My old 250w bike did 21ish and it was a big difference. It's all about feel, the way these take off then just shut down feels so unnatural
Yeah my old one was the same. Shame it was a piece of crapThat's something I like about my bike, because the is no "limit" on the speed the motor kreps going until its just not providing any more assistance. Its a very gradual tailing off of the power. You can still feel it helping a little at 20mph, at 21mph it's almost imperceptible and at 22mph you on your own.
But....its as smooth a butter, even when slowing down the power from the motor gradually comes back in again.
I could be chasing my tail but I'm not giving up just yet. If my hunch is right and the controller is a tongsheng, perhaps putting one of their displays on that allows the hidden settings would be enough to be able to tweak. If not then there is software available. If I'm wrong then the only option is swapping out parts as all other routes seem exhaustedThanks for the hard work you putting in anon4. If you ever crack this, you'll be receiving a crate of ale from me and I'm sure a few other crossfire-e / vulcan-e owners. Good luck!!
Any luck?I've hit a dead end. I am going to replace the controller. I want to minimize soldering, the motor wire is a HG-F-Z919. Finding this for sale has proved impossible so far. So If I can't get hold of this I'm going to have to solder a new controller or add crimp connectors. Another problem is will a left side Pas sensor fit or will I have to remove the suntour sprocket and replace with a regular one to make room?
Read all of these posts, feel like your solution could finally work! Good luck !!So imI going ahead with this. Connectors and tools are arriving, I have a Pas sensor ready, waiting on a standard crankset, 36v 350w controller and a thumb throttle. If all goes to plan the total cost is just over £70. Will post results, the controller is from China so could be a while yet. I'm hoping it fits into the enclosure, if the quoted dimensions are accurate it should fit. I'm excited
It's working. Just waiting on a new controller. I had one here but unfortunately the amp limit is too high for the battery BMS and it trips. I believe the limit is 15 amps. Tested with a Chinese battery with presumably no limit and although my test controller had no Speedo I'd say I hit 20mph ish on throttle alone going just down my street. Awaiting my controller, display and throttle to finish the job. I will do a tutorial if I have time. You will need to be able to do crimp connectors, and potentially soldering as there is not much length of wire to play with. But basically it goes like this:Read all of these posts, feel like your solution could finally work! Good luck !!