Search found 547 matches

by qwerkus
Sep 26 2020 5:10am
Forum: E-Bike Technical
Topic: FEM Dropout analysis - max force ?
Replies: 8
Views: 109

Re: FEM Dropout analysis - max force ?

Just another hint. Not sure what software you're using, so I'm not sure what level of control you have, but having such a fine mesh over the entire part is costing significant computational time. If you can, try running a much coarser mesh, and only refine it around the areas of interest. If you zi...
by qwerkus
Sep 26 2020 3:09am
Forum: E-Bike Technical
Topic: Programming Lishui LSW1545-5-1M controller
Replies: 1
Views: 52

Re: Programming Lishui LSW1545-5-1M controller

Hello All, Google has led me to the ES wiki and there is excellent information about Lishui LSW XXXX controller and programming. Can anyone give me detailed instructions on connecting from a USB/serial adapter to the controller? Cheers in advance for any help. If you are talking about parametring y...
by qwerkus
Sep 26 2020 2:54am
Forum: E-Bike Technical
Topic: FEM Dropout analysis - max force ?
Replies: 8
Views: 109

Re: FEM Dropout analysis - max force ?

Just so we're all speaking the same language, the unit of torque is Nm (Newton metres). Not n.m-2. So 100Nm @ 5mm is 100*1000/5=20 000N. You are correct. Since it is reacting in 2 places, each load will be 10kN. The problem you will have is that the force is acting on a line. Since a line has no ar...
by qwerkus
Sep 25 2020 5:07pm
Forum: E-Bike Technical
Topic: FEM Dropout analysis - max force ?
Replies: 8
Views: 109

FEM Dropout analysis - max force ?

Hello, I'm trying to setup a simple FEM static analysis of a bike dropout to figure out metal breaking point. Model is done and software seems to work. Though I could use some help with the physics. For an instance, what's the max. force a 12mm hub motor axle edge would put on a dropout face if the ...
by qwerkus
Sep 23 2020 12:53am
Forum: E-Bike Technical
Topic: e-Tricycle for adults
Replies: 48
Views: 615

Re: e-Tricycle for adults

Important to keep top speed in the 20-25kmh range, on an upright trike, (tipping around turns... until you learn to lean your body). This! Who in his right mind would suggest a bbshd for an elderly person with a disability !?! Even a 02 can be very powerful. Go for a 500w front hub motor or a heavi...
by qwerkus
Sep 22 2020 3:26pm
Forum: E-Bike General Discussion
Topic: New Barnyard Find (Ohm/BionX)
Replies: 14
Views: 409

Re: New Barnyard Find (Ohm/BionX)

You can actually hack any battery to work with a bionx system. All you need is to mount the bionx battery port somewhere on you pack, and add 2 buck converter to provide the additional rails required by the can bus system (iirc 5v and 12v). Search for bionx battery in this forum - I've seen it worki...
by qwerkus
Sep 22 2020 2:41pm
Forum: E-Bike General Discussion
Topic: Rear Hub Motor: Full suspension or hardtail?
Replies: 28
Views: 2796

Re: Rear Hub Motor: Full suspension or hardtail?

Depends on speed an usage. Hardtail with 2inch+ tire work great up to 30-35kmph. Past 25mph fullies own the street ... until you need to carry stuff. Then hardtails come pretty handy because it gives you a lot more options to expand transport capabilities of your bike (low trailer with axle mount, h...
by qwerkus
Sep 22 2020 4:56am
Forum: E-Bike Technical
Topic: Is regenerative braking really worth anything?
Replies: 95
Views: 1962

Re: Is regenerative braking really worth anything?

You guys forget the main advantage of dd hubs: no internal moving parts. Running a dd hub in true FOC (no sensors) is the sturdiest setup any ebike can have. This means a working motor AND a working brake in any conditions. Imo this is why I moved to dd hubs. That and silence. Regen is negligible an...
by qwerkus
Sep 13 2020 5:45am
Forum: E-Bike Technical
Topic: dead group in battery? 57volt on single cell?!
Replies: 3
Views: 102

Re: dead group in battery? 57volt on single cell?!

Could be a simple short to main. Check bms balance wires for defects. If all are fine and soldered to the correct P group, than the bms is probably defective.
by qwerkus
Sep 06 2020 10:08am
Forum: E-Bike General Discussion
Topic: EU only - Legality ? Share your experience.
Replies: 2
Views: 108

EU only - Legality ? Share your experience.

As ebike numbers increase, more accidents happen. As a results, several EU countires have pushed so called anti-tuning laws forward, like France recent L317-1: https://www.bike-eu.com/laws-regulations/nieuws/2020/03/e-bike-tuning-now-banned-in-france-with-30000-euro-fine-10137459 This type of legisl...
by qwerkus
Sep 04 2020 5:47am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

Fixed the PCB, up and running again with sensible, correct pid loop values. As promised, over the weekend I updated the PCB design to remove a few niggles, change the connectors for jst ph series, add the SWO line, remove the 0402 resistors... Best of all, it should now work with lm5163 so the whol...
by qwerkus
Sep 01 2020 12:41pm
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

This should explain the 3 holes. And the cooling. I have doubled the number of thermal vias for the next PCB revision. Heatsink is some random one that work buys hundreds of, removes from a device, throws away and replaces with another... Plan on using https://www.ebay.co.uk/itm/Transistor-IC-Heat-...
by qwerkus
Aug 29 2020 6:38am
Forum: E-Bike General Discussion
Topic: New 1000w Geared hub MXUS XFC19
Replies: 59
Views: 4121

Re: New 1000w Geared hub MXUS XFC19

MXUS has answered some questions about the XF-19: XF-19 has a speed sensor that can send data while coasting XF-19 has no temp sensor There is no 1000W cassette version, only the 500W XF-19 support a cassette But what about the torque? Compared to a MAC 10T is it higher or lower? A Mac is still the...
by qwerkus
Aug 28 2020 9:00am
Forum: E-Bike Technical
Topic: BBSHD 48V firmware
Replies: 12
Views: 507

Re: BBSHD 48V firmware

Do you have a display showing battery voltage ? On my bbs02, I frankly don't care about the green/red battery bar - all I need is checking actual voltage of the battery.
by qwerkus
Aug 28 2020 4:54am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

Mouser BoM for 1 off is coming in as 46GBP, 60USD, not including the 0603 resistors because I can't be bothered with choosing penny resistors tonight, and assuming mainly wire to board, except Hall&USB, but using all the expensive bits and STH310N10F7-2 FETs, which are absolute monsters. There are ...
by qwerkus
Aug 27 2020 11:26am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

I'm afraid that to date I've been entirely hand soldering. Building up boards for other people isn't high on my list... However, there's a possibility of jlcpcb assembly next time round, because like you I'm not super keen on 5 hours of manual pick and place. Perhaps get resistors, capacitors, MCU,...
by qwerkus
Aug 27 2020 12:19am
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

Personnaly my only wish would be esc specs up to 75V and 40A. Not planning on riding a motorcycle, but a simple 1000W dd hub can draw an impressive amount of power when starting. 75V is a safety buffer for regen as I've seen spikes of 67V when braking. This will easily handle that once I'm done unp...
by qwerkus
Aug 26 2020 3:12pm
Forum: Motor Technology
Topic: New ground-up ESC - MESC_FOC_ESC
Replies: 24
Views: 1003

Re: New ground-up ESC - MESC_FOC_ESC

2) What other inputs are desireable? (none is a great answer). Had to laugh out loud when I saw this! Great Project. Love the design choice to stay away from expensive DRVs and go with an generic chip like the STM32. Stancecoke (german Hochsitzcola) wrote firmware which is FOC cacapble for lishui c...
by qwerkus
Aug 26 2020 1:59pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 286
Views: 40669

Re: Serious FOCer (84V VESC 6 based controller)

Not going for the extruded enclosure. Just the extruded heat sink like in the photo and the whole thing capped by a plastic top. You can kind of see that in the last pic from my previous post. Still a low cost solution since the heat sinks are generic (like the szomk stuff) and the plastic portion ...
by qwerkus
Aug 25 2020 4:49pm
Forum: E-Bike General Discussion
Topic: New 1000w Geared hub MXUS XFC19
Replies: 59
Views: 4121

Re: New 1000w Geared hub MXUS XFC19

This is the controller I'm using. I've found the "torque simulation" = sine wave. http://www.pswpower.com/ven.php?cargo.2016-3f-28ym Previous to the MAC, this same controller was used on a 1500w direct drive. A lot of people don't know that the KT will work just fine with the MAC, but there's a sus...
by qwerkus
Aug 25 2020 6:24am
Forum: E-Bike Technical
Topic: Is it possible to build an inexpensive belt drive?
Replies: 15
Views: 300

Re: Is it possible to build an inexpensive belt drive?

An IGH has already non negligible friction losses, which can push the total to 12-13% in case of your Inter-7. human power is the tighter resource on a bike/ebike: don't waste it to pure friction losses. So save yourself some troubles and keep your chain. With the extra money, ditch that garbage In...
by qwerkus
Aug 25 2020 3:45am
Forum: E-Bike Technical
Topic: hall sensor type for double hall PAS
Replies: 2
Views: 86

Re: hall sensor type for double hall PAS

Hello, while trying to adapt double hall PAS sensor KT-D12L for right-side placement (by re-soldering the hall sensors to opposite side of PCB, to solve the problem that it detects rotation only bacwards), I managed to break one of the two tiny hall sensors. But I cannot find what type to buy, the ...
by qwerkus
Aug 25 2020 3:36am
Forum: E-Bike General Discussion
Topic: New 1000w Geared hub MXUS XFC19
Replies: 59
Views: 4121

Re: New 1000w Geared hub MXUS XFC19

My MAC 12t is using a KT w/sine wave, and is nearly silent, accelerating or not, at any speed. You run a MAC on a KT SVPRL controller ? Do you have a picture of that setup ? Until now nobody managed to run a MAC on a KT controller. I did run my Mxus GDR-19 on a KT sine wave controller however, and ...
by qwerkus
Aug 24 2020 4:27pm
Forum: E-Bike Technical
Topic: Generic Chinese controller and Cycle analyst V3
Replies: 1
Views: 115

Re: Generic Chinese controller and Cycle analyst V3

Hi everybody! First i would like to appologise for my approximate English, which could not be really enjoyable to read :confused: (I'm French [it happens...]) I recently bought a generic 48V chinese ebike kit (https://www.amazon.fr/OUKANING-1000W-%C3%A9lectrique-Conversion-arri%C3%A8re/dp/B07F9YG32...
by qwerkus
Aug 24 2020 4:23pm
Forum: E-Bike Technical
Topic: Ali Express Full Suspension Frame
Replies: 4
Views: 353

Re: Ali Express Full Suspension Frame

Not many fullies that can take a bbshd on aliexpress. Most sold frames are carbon which is too thick around the BB to push the motor through. Alloys frames are super expensive to ship by express. My 2 cents: just visit the local bike flee market (well at least if there are no corona restriction wher...