Search found 2700 matches

by madin88
Feb 17 2019 9:33am
Forum: E-Bike Technical
Topic: MXUS 3000 Hub Motor - V1 V2 V3
Replies: 1874
Views: 32869

Re: MXUS 3000 Hub Motor - V1 V2 V3

One broken magnet, measures 45mm x 14mm x 2.83mm Not bad for a few years of service. https://www.umagnets.com/c/neodymium-magents/neodymium-block-magnets/page/3/ 50mm x 15mm x 5mm N35, Coating Nickel-plated (Ni-Cu-Ni), Max. working temperature 80°C $3.99 Would grinding work on something like that? ...
by madin88
Feb 14 2019 7:16am
Forum: E-Bike Build Threads / Photos & Video
Topic: Super Commuter: 6T MAC 48V/120A Kelly in a 26" rim
Replies: 62
Views: 14623

Re: Super Commuter: 6T MAC 48V/120A Kelly in a 26" rim

crossbreak wrote:
Feb 13 2019 7:19pm
anyway I fell over these 100V capable little buck converters 100V
nice find :thumb:
thanks for sharing
by madin88
Feb 14 2019 6:58am
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 81
Views: 11066

Re: Optimal Hub Motor design? Break down of BionX D-Series

The glue they used is very hard and it doesn't soften much when heating it up, but i had the feeling that it was at least a bit helpful and that we did it really slowly. Surely it needs some luck that nothing cracks. It's got a 50% higher torque to weight ratio of most other performance DD hub motor...
by madin88
Feb 14 2019 5:43am
Forum: Items for Sale - New
Topic: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER
Replies: 776
Views: 84304

Re: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER

Anyone know why the "Common Port" version is slightly more expensive than the "Separate Port" version? I see this same pattern with other AliExpress sellers of BMS's. Technically seen, on BMS with common charge and discharge port, the discharge current has to flow through two banks of Mosfet's, whe...
by madin88
Feb 13 2019 11:37am
Forum: Items for Sale - New
Topic: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER
Replies: 776
Views: 84304

Re: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER

is this DALY 100 continue? how much peak is your 76 bike using? Yes, the 100A version can do 100A continuous (and 200A peak) according to the specs. The Mosfet's used on these Daly BMS are quite good and the wiring seems to be sufficient too for the specified current's. I have built that 76R for a ...
by madin88
Feb 13 2019 10:41am
Forum: Items for Sale - New
Topic: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER
Replies: 776
Views: 84304

Re: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER

I have used a Daly 20s BMS for a Q76R build: https://www.aliexpress.com/item/Daly-20S-72V-Lili-ion-BMS-120A-150A-Big-Current-for-18650-Lithium-Ion-Battery-Pack/32922558650.html?spm=2114.search0104.3.28.40c75a9ek0RIJF&ws_ab_test=searchweb0_0,searchweb201602_2_10065_10068_10547_319_317_10548_10696_100...
by madin88
Feb 13 2019 6:42am
Forum: Motor Technology
Topic: Optimal Hub Motor design? Break down of BionX D-Series
Replies: 81
Views: 11066

Re: Optimal Hub Motor design? Break down of BionX D-Series

On the subject at hand of the BionX D motor, the core drag at 250 rpm (typical ebike speed) is 0.68 Nm, of which 0.45 Nm comes from hystersis of the iron (not affected by lamination thickness) and ~0.23 Nm comes from eddie currents. If they went with 0.27 instead of 0.35mm, the expected reduction i...
by madin88
Feb 11 2019 5:47am
Forum: E-Bike General Discussion
Topic: SUPER SOCO ... no Sur-ron here =)
Replies: 39
Views: 3485

Re: SUPER SOCO ... no Sur-ron here =)

The TC max also seems to come with a removable battery:

Image

Image
by madin88
Feb 11 2019 5:28am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 182
Views: 4163

Re: APL's DIY axial-flux motor

As far as halbach field strength goes, I guess it's closer to 2x normal, rather than 3? The two magnets on either side of the main poles are giving up half their force to the pole magnet, giving it almost twice the strength. Let me share a bit of what i have learned about mangetic circuits: Let's a...
by madin88
Feb 10 2019 5:28am
Forum: E-Bike Technical
Topic: Automatic Wheelie control / Launch control module Beta testing
Replies: 11
Views: 267

Re: Automatic Wheelie control / Launch control module Beta testing

What a brilliant idea :thumb: I'm keen to see more reviews of that.
by madin88
Feb 05 2019 9:25am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX Motor - Kelly Controller - Hall Problem?
Replies: 5
Views: 234

Re: LMX Motor - Kelly Controller - Hall Problem?

It's always nice to see how forgiving Infineon controllers are in terms of that. They just work and make no trouble. Doesn't LMX use same Kelly controller? If yes i would ask them for advice. I don't know if 4-5A at 72V or 350W is to much, but for a motor this size it should be quite normal. What wa...
by madin88
Feb 05 2019 7:57am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 108
Views: 14848

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

Overclocker wrote:
Jan 28 2019 11:35am
as for the RED LINE i'm still thinking about it... it's probably not needed? what do you think?
The red tube shows what i meant as second, but i also think if you weld the green tubes it should not be that important anymore.
by madin88
Feb 02 2019 8:18am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1405
Views: 166141

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I'm back to trying to convince leafbike to produce a 0.27mm or 0.2mm lamination version of this motor.. Offered $500 for a single motor to cover any R&D costs they may incur. Fingers crossed. Great that you stay in touch with them :thumb: What i noticed is that manufacturers, when they make use of ...
by madin88
Jan 28 2019 5:27am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 108
Views: 14848

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

nice work :thumb:
As a small hint in terms of form stability of the frame, i would weld something like the "X" as done on LMX frames near the head tube to make it stiffer.
And i also would weld another tube between motor and battery to have upper and lower tubes connected.
by madin88
Jan 27 2019 1:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3128
Views: 193198

Re: Sur-Ron - New Mid drive Bike

This design is neat because it allows for a mid drive type power train, however, the enemy of handling when it comes to suspension is unsuspended mass. This design will probably not function any better handling wise than having the hub motor in the wheel. Of course I could be incorrect as this desi...
by madin88
Jan 27 2019 1:51pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 399
Views: 30694

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

VasiliSk wrote:
Jan 27 2019 5:48am
lcd shell is molded based on 3d printed model with some processing
Do you plan to offer the molded LCD shell as replacement part?
by madin88
Jan 21 2019 1:27pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 399
Views: 30694

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

Im still not sure how i should implement this 'feature' in meaning of whole system, it's not just single controller. And also one needs press brake 5 times, other needs press brake and throttle, another enter password... What about a "reset button" which does something like following: If this butto...
by madin88
Jan 21 2019 8:52am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 3128
Views: 193198

Re: Sur-Ron - New Mid drive Bike

I'm confused, the talk not too long ago was how a belt drive couldn't take the torque or the belt would not handle the power. Now everyone is assuming it will work by slapping on a belt and sprocket? Its no big deal to make a sprocket and install a belt. Why is everyone assuming this will work? Zer...
by madin88
Jan 17 2019 3:36am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Knight Electric Motorcycle 5000w
Replies: 53
Views: 1913

Re: Knight Electric Motorcycle 5000w

skeetab5780 wrote:
Jan 16 2019 9:49pm
So i may have accidentally bought this bike...offered them $2500 and they accepted it.

Oh boy
Awesome!
which version exactly and is it street legal?
by madin88
Jan 16 2019 3:37pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Knight Electric Motorcycle 5000w
Replies: 53
Views: 1913

Re: Knight Electric Motorcycle 5000w

Yes i thought the same about the fork legs, and then they added those brake caliper adapter for making it suitable for the large brake discs. Same thing on the rear.. When looking closer to the dropouts it seems they just used that small torque plate that comes with the motor, and no clamping mechan...
by madin88
Jan 16 2019 9:03am
Forum: Motor Technology
Topic: SiliXcon FOC Controllers, small, powerful and many features
Replies: 6
Views: 486

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

It's the same guy that made this video. https://youtu.be/PcBaZ9sO9A4 I remember him posting about his Controller Company on here a few years ago. It used to be called PearControl :lol: :lol: Yes it seems like the company was split or is from pear control. Those are the specs of the smallest size, t...
by madin88
Jan 16 2019 5:18am
Forum: Motor Technology
Topic: SiliXcon FOC Controllers, small, powerful and many features
Replies: 6
Views: 486

SiliXcon FOC Controllers, small, powerful and many features

Hey guys, it happended that i came across mentioned controller company. I thought it would be of iterest here as these controllers have outstanding features like FOC with direct torque control, MTPA (maximum torque per amp) control and zero-RPM sensorless control. MTPA under field weakening would be...
by madin88
Jan 14 2019 1:56pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Knight Electric Motorcycle 5000w
Replies: 53
Views: 1913

Re: Knight Electric Motorcycle 5000w

It's cheap and doesn't look bad, but it comes with SLA batteries and a hub drive which makes me think that overall quality will be questionable.
I mean, who is using SLA batteries on an electric bike these days?
by madin88
Jan 14 2019 4:43am
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 5024
Views: 482360

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

Only if theyre new.....got 15000 km on my Raptor battery out of samsung 25r and yes they drift more and more. At some point the adaptto bms cant catch up with the drift and you have to do it manually from time to time. Impressive number of km :) If a pack starts to drift, it usually means that one ...
by madin88
Jan 14 2019 4:22am
Forum: Items for Sale - New
Topic: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER
Replies: 776
Views: 84304

Re: Qulbix Q76R Frame Kits & Complete Bikes PRE-ORDER

I added small nickel strips to put the cells in series typo? because the small nickel strips put the cells in PRALLEL (on one side only), and the wires make the series connection. When you built this battery, safety wasn't first priority, right? but it's good to see that it stays balanced so well :)