Search found 2956 matches

by madin88
Jul 31 2020 5:22am
Forum: Motor Technology
Topic: BAC800 vs. Neumotors 8025
Replies: 5
Views: 419

Re: BAC800 vs. Neumotors 8025

What is the ERPM limit of ASI?

At 8000RPM it would be 64000ERPM (8 pole pairs) which could be to high for the controller.
by madin88
Jul 28 2020 2:38am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1230
Views: 111031

Re: APL's DIY axial-flux motor

The rotors should not be able to be anything but straight, so that's another part of the problem, and another reason why I'm having such a problem getting things centered. Evidently the six small spacers I have are a bad design, and need to be extended into three long ones that use the same bolt ho...
by madin88
Jul 20 2020 1:00am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36138

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

nowholeself wrote:
Jul 19 2020 4:01pm
Neumotors 8025 with factory installed hall sensors.WIN_20200719_13_58_28_Pro.jpg
Thats nice to see. Did you spin it up already and does it run smooth?
Would you mind to share more photos of the hall board (with the rotor removed)?
by madin88
Jul 16 2020 3:26am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1230
Views: 111031

Re: APL's DIY axial-flux motor

Looks professional done and for sure it will work well and powerful :thumb:

How is the airgap width?
Do you run it sensorless first?
Can you measure BEMF to see how good it will work with FOC and sine controller?
by madin88
Jul 04 2020 11:06am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 173
Views: 36138

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

Hi, very nice and detailed build log. What caught my interest was - U said it is is registered as moped. Did u have to go individual test or u had different approach how to make it road legal? At least it doesnt seem to me like it was commercially made ebike/frame from start but I might be wrong, j...
by madin88
May 23 2020 3:38am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4605
Views: 843285

Re: Cycle Analyst V3 preview and first beta release

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...
by madin88
May 15 2020 7:06am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 472
Views: 51713

Re: Li-ion cells cycle ageing

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...
by madin88
May 15 2020 3:42am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1230
Views: 111031

Re: APL's DIY axial-flux motor

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...
by madin88
May 14 2020 6:19am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 472
Views: 51713

Re: Li-ion cells cycle ageing

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...
by madin88
May 14 2020 6:08am
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 791
Views: 78887

Re: E-S LMX 64 Bike Owners

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...
by madin88
May 14 2020 5:30am
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 124
Views: 20260

Re: Sur-Ron - Belt upgrade KIT

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 ...
by madin88
May 14 2020 5:12am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1230
Views: 111031

Re: APL's DIY axial-flux motor

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...
by madin88
May 01 2020 6:22am
Forum: Motor Technology
Topic: Some Motors Incompatible with Statorade / Ferrofluid cooling?
Replies: 27
Views: 1506

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

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...
by madin88
Apr 19 2020 12:07pm
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 124
Views: 20260

Re: Sur-Ron - Belt upgrade KIT

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...
by madin88
Apr 08 2020 6:33am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1467
Views: 153835

Re: Nucular electronics - complete kit for ev! [beta]

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 ...
by madin88
Apr 08 2020 5:07am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4605
Views: 843285

Re: Cycle Analyst V3 preview and first beta release

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...
by madin88
Apr 08 2020 4:57am
Forum: E-Bike Technical
Topic: Eaton APR48-3G 1.8kW Light Compact Charger PSU
Replies: 230
Views: 44062

Re: Eaton APR48-3G 1.8kW Light Compact Charger PSU

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
by madin88
Apr 07 2020 11:12am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V3 preview and first beta release
Replies: 4605
Views: 843285

Re: Cycle Analyst V3 preview and first beta release

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)
by madin88
Mar 30 2020 11:48am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 317
Views: 35957

Re: Nucular Electronics owner's thread

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...
by madin88
Mar 29 2020 10:20am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 955

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

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...
by madin88
Mar 29 2020 9:37am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 955

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

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...
by madin88
Mar 27 2020 2:31pm
Forum: Items for Sale - New
Topic: Sur-Ron - Belt upgrade KIT
Replies: 124
Views: 20260

Re: Sur-Ron - Belt upgrade KIT

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...
by madin88
Mar 27 2020 11:12am
Forum: Motor Technology
Topic: Some Motors Incompatible with Statorade / Ferrofluid cooling?
Replies: 27
Views: 1506

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

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 ...
by madin88
Mar 27 2020 10:38am
Forum: Motor Technology
Topic: The person who has been running higher power through hubmotors than anyone here doesn't use Ferro Fluid
Replies: 18
Views: 955

Re: Some Motors Incompatible with Statorade / Ferrofluid cooling?

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...