Search found 2750 matches

by madin88
Apr 11 2019 7:15am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 50
Views: 4228

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

The v1.3 a200s board with the hsof-8 fets has been running well. Played around with the observer gains and rc filters on the current sense output. Now I can be as rough on the throttle as I want at 300A phase in sensorless. Everything is smooth with no faults. Does the controller need a given motor...
by madin88
Apr 07 2019 8:26am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1190
Views: 195517

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

madin88 , I know the theory, but I could not understand why when climbing with the 2 bikes head to head, the 3.5T is consuming more power, has less torque and still the 5T is overheating like crazy compared to the 3.5T even on 2 kw! What I missed out thought might be these phase amps as I was only ...
by madin88
Apr 06 2019 6:59am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

Thank you Vasili for your quick response. Kudos! Looking forward to the release of V.07 then :thumb: - power modes cannot be toggled Speed scroll button was added, don't remember which software but there should be option in display, also planned + and - buttons On V0.6 it does not work even if i hav...
by madin88
Apr 06 2019 5:13am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 343
Views: 36119

Re: Suzuki GSX-R e899 K2

The bike looks like a toy RC bike with that big controller in the frame :mrgreen:
by madin88
Apr 06 2019 4:56am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1190
Views: 195517

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

Any idea where the issue might be? The 5T winding has a higher phase-to phase resistance and so it will produce more heat at given phase current. Assuming that both kind of windings have the same copper fill, they will have exactly the same performance (Watts) if you adjust the amps and volts like ...
by madin88
Apr 04 2019 3:44am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

I am using the controller now for a few hunderd km and so far i am very happy - especially in terms of performance and efficiency it works well. What i really like is the "auto charge" function. This means that you simply can connect the PSU and controller starts to charge - without the need to ente...
by madin88
Apr 04 2019 3:03am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

hey Madin88 what was the problem with your Adaptto PSU (? Did you use an Eaton ?) There was no problem with the Eaton PSU itself. The reason why i did buy a new one was due to the fact that i have built the Eaton into a case together with the coil harness. http://imagizer.imageshack.us/v2/xq90/538/...
by madin88
Apr 03 2019 6:36am
Forum: E-Bike Build Threads / Photos & Video
Topic: Neu 8057 6kW left hand drive hardtail with vesc and encoder
Replies: 50
Views: 4228

Re: Neu 8057 6kW left hand drive hardtail with vesc and encoder

Nice! Have you seen the VESC app with speedometer and dashboard? By now the lack of a display function has kept me from using VESC on e-bikes, and given that there are already plenty of different and affordable VESC6 controllers availbe these days this is quite a highlight. https://play.google.com/s...
by madin88
Apr 03 2019 5:37am
Forum: Motor Technology
Topic: SiliXcon FOC Controllers, small, powerful and many features
Replies: 17
Views: 1232

Re: SiliXcon FOC Controllers, small, powerful and many features

They gave me a quote of 508USD + extra charges for a single AM controller. I was pretty shocked because I don’t really have that in my budget. Can’t decide what to do as of now. Not cheap concidering that you would get only a single 12s 50/100A controller without display. Does anyone have seen the ...
by madin88
Apr 03 2019 5:16am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 134
Views: 17612

Re: New build, BHT mid-drive "direct", custom frame

Overclocker wrote:
Apr 02 2019 7:03am
anyway i just got back from an event...
Congrates! :thumb:

Did you won a race? or a building contest?
by madin88
Apr 01 2019 4:50am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3459
Views: 225527

Re: Sur-Ron - New Mid drive Bike

It's my understanding that chains are more efficient than timing belts, here are results from a test, the chain was 34.6% more efficient: https://www.bikeradar.com/road/news/article/chain-or-belt-drive-which-is-faster-36074/ Belt drives usually have higher losses when unloaded because of the very h...
by madin88
Mar 31 2019 3:37am
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 5059
Views: 498505

Re: Adaptto Mini-E/Max-E Owner's Thread

I am leaving my bike on to balance. The balancing actually got worse. The top picture is the current balance at .012 volts. The bottom was .010, even .009 volts before I started. Why is my balancing not getting better but worse? Most BMS and the one from Adaptto too has an accuracy of around +-10mV...
by madin88
Mar 26 2019 1:47pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 440
Views: 36636

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

BMS under development 6F goes to March due to production delay and chinese NY, we are preparing some awesome news Any news yet about the size of the BMS and it's connectors? Will it support single cell voltage monitoring in smaller configurable groups of four or something like that (i mean similar ...
by madin88
Mar 22 2019 7:24am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Re: Revolt RV-series motor review and comparisons

Shock loads from impacts, even potholes hit by the tamest of riders put so much higher loads on the powertrain than propulsion torque loads, you don't design a powertrain around the torque loads at all, but the shock loads. Do you think that size of the drive sprockets or pulleys would have an infl...
by madin88
Mar 21 2019 4:20pm
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Re: Revolt RV-series motor review and comparisons

As already mentiond, it is the Loctite 648 which should be used for that.
The feather key should be up to the task for what the motor is capeable to deliver to the shaft, but i agree that it is a little bit undersized.
btw: it is the torque which will shear off the key and not the power! :wink:
by madin88
Mar 18 2019 8:35am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 134
Views: 17612

Re: New build, BHT mid-drive "direct", custom frame

Did you paint the frame or is it powdercoat? Looks nice :thumb:
by madin88
Mar 18 2019 8:33am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Re: Revolt RV-series motor review and comparisons

From the looks the stator seems to be on another level in comparison to the previous revolt motors. Thank you for the pics! Why they decided to place the hall sensors beside the stator hanging free, and with a large gap to the magnets is kinda strange and also the thing with the large resistors look...
by madin88
Mar 14 2019 10:09am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

Most ripple current comes for controller caps, PSU sees almost dc current Thanks for clarifying. What i noticed is when i was charging with Adaptto at 1600W, the charging lead (2 x 5mm²) did heat up alot more as it does now which would make sense now. So the thing with the caps was kinda overcarefu...
by madin88
Mar 14 2019 9:42am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

eee291 wrote:
Mar 14 2019 9:17am
I doubt you needed that extra capacitor though since server PSUs have a pretty high switching frequency.
Yes, but the controller will do a step up conversion and so the caps on the output probably will see a lot more voltage ripple as they typically would.
by madin88
Mar 14 2019 9:31am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3459
Views: 225527

Re: Sur-Ron - New Mid drive Bike

What length belt did you use. Fortunately we could use a standard size for the 25/93T gearing. It is 1440mm long. From my experience the best belt is the Optibelt Delta Chain carbon, followed by Gates Poly Chain GT carbon and the standard Gates Poly Chain GT (without carbon). The reason i would pre...
by madin88
Mar 14 2019 7:28am
Forum: E-Bike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 51
Views: 2909

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

I had to look for a new battery charger (48V PSU) for the Nucular controller because the one i was using for Adaptto before did not work. Back then i have built it into a case together with the coil, but it turned out that PSU + Coil does not work with the Nucular (at least at the moment there is no...
by madin88
Mar 14 2019 6:26am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3459
Views: 225527

Re: Sur-Ron - New Mid drive Bike

Future test results: I full throttled the bike up a steep hill and the belt snapped. My friend lightly touched the throttle with his 8KW modified controller and battery and the belt snapped. :shock: just kidding, this was just a joke. I have seen that people added a second, pre-installed replacemen...
by madin88
Mar 13 2019 5:17am
Forum: E-Bike Build Threads / Photos & Video
Topic: Vector bike and frame owners.
Replies: 956
Views: 110570

Re: Vector bike and frame owners.

Does anyone have experience with this stand on the Vector frame? This kickstand looks similar as the one i bought for my vectors: https://endless-sphere.com/forums/viewtopic.php?f=6&t=68385&p=1310291&hilit=kickstand#p1310291 34.jpg If it does fit straightaway depends on your crank and frame geometr...
by madin88
Mar 13 2019 4:44am
Forum: Motor Technology
Topic: Revolt RV-series motor review and comparisons
Replies: 176
Views: 8387

Re: Revolt RV-series motor review and comparisons

I tried pwm frequency from 5 to 30khz in foc. At 30khz phase current was 6a. Dropping the switching frequency resulted in higher measured motor current. At 5khz it was over 15a. In trap mode it was about 7a. Controller was a vesc. That makes a lot of sense. If you would run this motor with 5kHz PWM...