Search found 2461 matches

by madin88
Apr 19, 2018 1:13 am
Forum: E-Bike General Discussion
Topic: Stongest tandem ebike wheel build help
Replies: 55
Views: 1128

Re: Stongest tandem ebike wheel build help

Hear is a close up. Also 8 speed freewheel im forcing in costs money also. 2018-04-18_15.30.02.jpg I never would use 12GA spokes on this hub. They probably have drilled out the holes to make the large spokes fit. With a flange diameter that small there is not much material between the spoke holes w...
by madin88
Apr 18, 2018 9:58 am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

Today i installed the motor to the swingarm. I wish there would be a bit more clearance between it and the wheel (so i could add the fender i used before), but anyway i'm quite happy that there was standard belt length availabe that suit my needs. What i'm missing now is the belt idler and a new mot...
by madin88
Apr 18, 2018 9:17 am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

Hi Maddin, thanks for posting, quite an inspirational build. Interesting use of adhesive. Couple of questions if you don't mind, did you include a 'fence' on only one side of the pulley to aid machining? No need for a fence on the second side? It is called belt guide flange :) yes as this pulley is...
by madin88
Apr 18, 2018 3:24 am
Forum: E-Bike General Discussion
Topic: Stongest tandem ebike wheel build help
Replies: 55
Views: 1128

Re: Stongest tandem ebike wheel build help

Bicycle spokes go up to 13g realistically; maybe 12g with really good rims/hubs. Beyond that, stuff like 10g and larger, theyre really moped or motorcycle spokes, in that the rims and hubs needed for them are not generally found in bicycle stuff. There are new Spokes from Sapim called "E-strong". T...
by madin88
Apr 18, 2018 2:46 am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

Thats what the Software from Gates puts out if all parameters entered. Following calculation is at 14kW input (10kW with so called 1.4 service factor) at 5000RPM on the motor. As you can see it can handle above 14kW (output power on the motor shaft, not input power). https://imagizer.imageshack.com/...
by madin88
Apr 17, 2018 1:35 pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

iv seen it said that a belt wont last long at 10+kw, but i suppose it depends on the belt quality and depends on the cost, as i wouldnt mind replacing the belt every few months as a tradeoff. If it lasts long or not depends on the torque and RPM of the smaller driver pulley. There is a software fro...
by madin88
Apr 17, 2018 1:17 pm
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

The past days i made some progress. I have receiced the LMX dual disc hub (new version with dual row bearings black anodized), the 17x1,4" moped rim from Prowheel and Sapim spokes from Yojimbos garage (ebay seller). But the best thing is the parts for the belt drive also came in. For building the wh...
by madin88
Apr 15, 2018 11:51 am
Forum: E-Bike Non-hub Motor Drives
Topic: HPC Revolution XXX
Replies: 348
Views: 39812

Re: HPC Revolution XXX

Caught a glimpse of something very interesting on Hi Power Cycles' (HPC) website... might just be the thing I'm waiting for. This pic is on their Facebook site, no info yet, but will be waiting to see what they develop. In the meantime it'll be a hub for now. The MXUS V3 is such a bargain, problem ...
by madin88
Apr 14, 2018 1:53 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 392
Views: 14842

Re: 32S, 300 amp, BT, LCD BMS

Can I swap all the 100V HY045N10 fets for AOT2500? You have the 24s <100V BMS, right? so it would be really stupid to swap them out for AOT2500 which have more than twice the resistance. The HY's are not bad. Almost as good as the widley used IRF4110 in terms of Rds on :wink: How do I check if the ...
by madin88
Apr 13, 2018 5:47 am
Forum: E-Bike Technical
Topic: Adaptto Mini-E/Max-E Owner's Thread
Replies: 4837
Views: 391735

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

He has been testing this controller for about a month now with all kind of motors and points out that this is the only controller out there that creates optimal environment for ANY motor at ANY load. This means that depending on the load and speed, the controller instantly adjusts all the parameter...
by madin88
Apr 13, 2018 4:43 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 945
Views: 47975

Re: Sur-Ron - New Mid drive Bike

FYI: Luna has a ASI controller on one of their test bikes. They say because the ASI has field weakening it spins 20% faster so they made a 60t sprocket for it: At 12:03: https://youtu.be/Lw1mLYKVxaY?t=726 Thats a nice upgrade and field weakening makes a lot of sense. Hopefully the battery and bms c...
by madin88
Apr 13, 2018 2:08 am
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 945
Views: 47975

Re: Sur-Ron - New Mid drive Bike

I am curious about getting more power out of the stock motor. When I look at the factory motor graphs the efficiency drops off. How does a different controller make more power? hp3000.jpg ph3000 graph 2.png For a serious tuning it would need more than just swappping controller. It needs more volt a...
by madin88
Apr 12, 2018 6:05 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 392
Views: 14842

Re: bluetooth BMS?

flippy, a drop of 0,15V in one month on a battery which has 30A is definitely not normal. Think about a normal e-bike battery which have more like 10Ah. Such battery would be dead if stored over the winter month even if fully charged (0,45V per month). When i stored one 48V 12Ah battery over the win...
by madin88
Apr 12, 2018 5:50 am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 934
Views: 144475

Re: LMX P2 : Freeride trials motorcycle frame development

The great thing about the Sempu T2.3 sensor is it doesn't need a sprocket carrier (or adapter) like the bafang does.
Which controller do you talking about, or do you mean the CA?
by madin88
Apr 12, 2018 2:36 am
Forum: E-Bike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 934
Views: 144475

Re: LMX P2 : Freeride trials motorcycle frame development

We will be testing two models of torque sensors from bafang and senpu, Ive talked to Mr Thun on the phone and guys from NTCE (the sensors in thun BBs) but they are focused on mass production of 68mm BB sensors while we need 100mm BSA. Yes 100mm BB is indeed a problem. I would check for Fatbike BB, ...
by madin88
Apr 10, 2018 2:12 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 945
Views: 47975

Re: Sur-Ron - New Mid drive Bike

poor small bump and chatter compliance (when optimized for bigger hits) is pretty characteristic of air suspension.. I look forward to ride reviews of light bee with the fast ace coil spring set-up.. is it just a matter of changing out the one fork leg?? coil sprung leg might be a good upgrade opti...
by madin88
Apr 07, 2018 5:38 am
Forum: E-Bike Technical
Topic: Lightest DD motor?
Replies: 13
Views: 417

Re: Lightest DD motor?

The Grin Tech all axle hub and BionX D-Series have both around 4kg.
by madin88
Apr 05, 2018 12:44 pm
Forum: E-Bike Photos & Video
Topic: NYX in the mix
Replies: 11
Views: 481

Re: NYX in the mix

brumbrum wrote:
Apr 05, 2018 7:56 am
Cool build. That is a very well balanced pack!
It looks well build so it will stay well balanced.
by madin88
Apr 05, 2018 7:04 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 392
Views: 14842

Re: 32S, 300 amp, BT, LCD BMS

This is truly confounding! This is a 32S BMS. That means it realistically needs to handle upwards of 140 volts depending on cell chemistry. So why does it have 100 volt mosfets (HY45N10's) on the C- side? Why no access to P- where it has 150 volt IRF4115's? There is no part of 100 volt mosfets that...
by madin88
Apr 05, 2018 4:26 am
Forum: E-Bike Photos & Video
Topic: NYX in the mix
Replies: 11
Views: 481

Re: NYX in the mix

This one begs for a number plate (single vehicle approval) so you can ride with it like a moped on the roads with a smile past the cops. Awesome that you could fit 21s18p into this frame. Thats probably the largest battery ever fit into a NYX. How much range do you get at moped speeds (or about 70km...
by madin88
Apr 04, 2018 9:34 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8126

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

The Lightningrods "big block" motor, Denzel D4500 or the motor LMX have should have identical performance. Check them out.
From what i know the LMX motor is the most powerful one because it has a 60mm long stator :wink:
by madin88
Apr 04, 2018 3:01 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 392
Views: 14842

Re: bluetooth BMS?

how do you drill copper sheet for the P+ without crumpling the copper? Sandwich the copper between 2 pieces of wood and drill through the wood. It holds it all flat. You are duplicating the hole pattern of all those mosfets screwed down to the board. Thanks electricgod, veryuseful info. I might try...
by madin88
Apr 03, 2018 7:25 am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 49
Views: 3264

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

I did have Neu 4400 on a boat back in college that moved pretty quick: https://www.youtube.com/watch?v=QGvg7ujdlDo Wow that boat looks quick. Thumbs up for such impressive build! The datasheet of the encoder reads well and i like how easy it can be added with that small magnet. Let me know how your...
by madin88
Apr 03, 2018 2:04 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8126

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

Overclocker wrote:
Apr 02, 2018 10:48 pm
zero calculations made w/ this build (except for RPM calculations) :lol: it's all based on intuition :roll:
Yeah i do it the same way most of the time, but sometimes it's deeply interesting to know some values :)