Endless Sphere

I have installed a new torque PAS with Sempu T4.3 sensor which came as 1-wire type with 48 poles, and noticed the CA does not allow to set more than 32 poles. Any numbers higher than that are not applied. Why it cannot be set higher than that? Is there a reason for? I still got good results with a 2...

Typically the battery in an electric bike should/will last for 1-3 hours of continous riding. On average this translates to C/3 to 1C discharge rates. So 2,5A per cell is perfectly fine. Who would build an ebike that has an empty battery after just 12 minutes of driving? (VTC6 or HG2 at 15A contino...

In (d), I'll extend the core, so that the coil turns are distant, and only the face of the core is having an effect, then rotate the core 90 degrees at a time. Isn't the flux that the PM sees, and used for torque, the same no matter the direction the core and coil are turned? Yes it is the same, bu...

But we have to consider, accoring the first post, the discharge current is 2.5A only. Yeah, its good over the datasheets discharge rate and closer to reality. But I think many e bike riders here load their batteries with higher constant current per cell. Or do you want to commute 30mph (45kmh) with...

I'm hoping the steel front sprocket is really enough to solve all our problems, so lets start with that first and see how it goes. That belt looks expensive, but let us know what they quote you. Cheers The best solution for the problem would be a 20T+ pulley and a motor with more torque :wink: As i...

Why on earth doesn't the rear sprocket have an inner retaining ring? Please don't say 'because it doesn't need one', that would be lame. As I see it if I hit anythingfrom the side the belt will just come off and I'd be stuck. Is that the idea, for it to come off for sfety reasons? This is standard ...

Those are beautiful. I forget, why did you not use a brim on the end turn area? From what I read before, that's a way to reduce copper losses and weight. https://things-in-motion.blogspot.com/2019/07/bldc-pmsm-end-turns-and-torque.html from chapter 2: "End turns in air-core motor designs are not co...

I think it would be interesting to hear if people had problems without statoraid too. https://endless-sphere.com/forums/viewtopic.php?p=1551213#p1541839 There have been some cases i know with QSV2 (Cromotors) but those had the rectangular magnets which make a gap to the back iron which leads to low...

After installing this kit, i get the noise right when i start up the bike, HOWEVER after the first few hundred feet it goes away and doesn't come back until the bike has sat overnight. Very strange. My bet is on something within the primary drive belt and the shaft, NOT this kit. Yes i did listen t...

I am using charge mode quite often and thought that it would be good to have more infos on the screen which show whats going on. Is there anything planned? something which look like this: If you connect the PSU to controller then a pop up message shows "charger detected, switch on to start" Then if ...

this may not be the problem, but just to be sure it's got sufficient power: what voltage does your sempu require to power it, and where is it being supplied from, and what is the actual voltage of that power supply at the sensor connector? It is 12-60V version. On the CA the ouput for torque sensor...

eee291 wrote: ↑

Mar 16 2020 12:32pm

Is this even a legit Eaton rectifier?
Could you snap a few pics from the pcb?

It probably is made by Eaton but not exactly the same version.
This is PCB of APR48-3G which looks different http://imagizer.imageshack.us/v2/xq90/538/RmLBHv.jpg

Is anyone here having issues with Sempu 2.3 torque sensor and CA showing only 0.25V idle, while it should be 1.5V?

I have two sensors and both don't work so i wonder if they just came defect or if there is something wrong with the CA (it has actual V3.1 FW but it is already some years old)

The switch ON/OFF has blue and yellow cables. I don’t want them to connect them directly to the battery. I can connect them to the ‘remote connector’ of the controller, cut their terminal and crimp a new JST connector. So, the yellow cable goes to K1 and the blue cable to the ground. Am I right? Wh...

Might I ask, what is a "salto"? a flip forward I can defiantly handle curves and takeoff better than most cars and trucks.. till I run out of Kv.. I still can also flick so hard I would go into an instant lowside. Yall watch I'll push the limit some day I alsoways do. It is fast enough to really hu...

For more typical intermittent high power use, the 10-20% I mentioned before is likely to be spot on for how much FF allows you to increase current settings. hmmm :o how can you claim to know better than Justin without having tried it? According to his measurements of thermal conductivity you can ru...

The same sound is heard in this video: https://www.youtube.com/watch?v=jdGNE343-mU The noise you talk about is it the high pitch wine which is getting louder when you film on the controller? This sounds like typical noise from the controller and/or motor which comes from PWM frequency being in audi...

Very interesting that a product meant for "high power builds" doesn't work and cooks off and melts magnets.. on high power builds... Generally from what i learned back then when i bought direct from MXUS factory is they do not have much interest to offer motors with a bit higher quality level than ...

Why? The person who has been running higher power through hubmotors than anyone on the forum for almost a decade doesn't waste the time or money (and as it turns out, motors) using FF. I didn't mock anyone. I'm just pointing out there are better more effective ways to get more performance. Now swit...

The question is,.. if we make the back iron thinner and thinner, at what point does it become a one turn short, if at all? Or is it because the iron is not really going around the cores,.. only between them? Am I missing something? Because if I can use a thin steel ring to hold the cores, then the ...

serious_sam wrote: ↑

Mar 21 2020 6:04pm

Do you know of any references or further reading for more detail on specifically why FW is more efficient on IPM motors?

viewtopic.php?f=30&t=97880&start=75#p1436291
viewtopic.php?f=6&t=95100#p1392739

Hope it is ok to post about issues with motors from other manufacturers too? In my case this happend with one MXUS V2 where about 10ml of genuine Statorade "Type B" was used. It did react like a solvent with the glue and dissolved it. All the magnets came loose, and the glue, which normally is rathe...

But how did adaptto and asi sort those things out? With these controllers you gain massive more speed. Asi btw is limited to 90v only VS 92v nuc. There must be something "different" how fw is used 🤔 That only know the devolopers. One assumption is that Nuc want's to protect the Controller in case o...

But FW is inefficient, so using it all the time just burns power and overheats the motor. It's like a turbo boost button. Only good in short bursts. Trying to get more speed with a lower voltage pack and using FW is a false economy. You'll need a much bigger pack anyway (more Ah) to pay for the was...

@madin88 do you think that using the Qs 138 on a vehicle over 400kg and with a gear ratio greater than 7 engine revolutions for 1 wheel revolution accentuates the problem ? I think that the inertia created by the weight of the vehicle and the speed of rotation which is at the maximum of what accept...