Search found 95 matches

by usertogo
Jun 07 2019 12:25pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 23583

Re: Steel-geared hub motor?

I used a TIG machine (which is a precision instrument in welding world) to place a bead around shaft. I finally got around to weld one of my clutches (normal stick welding at least spots on both sides), hoping to finally use these 8fun motors again - but surprise something else is slipping inside! ...
by usertogo
May 13 2019 10:19am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

A little update on my PSU hacking attempts: https://cloud.botox.bz/s/YiDciose2DwzkTL/preview I love it, But I wonder does bluetooth penetrate the case when its closed, or are you not planning to close it? Work in progress still, code on GitHub https://github.com/BotoX/huawei-r48xx-esp32 Using this ...
by usertogo
May 13 2019 9:54am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 3822
Views: 328221

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Thanks for creating and maintaining this OpenSource effort so active! I also want to get in to it in my latest build and am wondering if these controllers are the type that take the developed firmware: https://www.aliexpress.com/item/Okfeet-56V-90V-60A-Electric-bicycle-standard-square-wave-controlle...
by usertogo
May 13 2019 5:31am
Forum: Motor Technology
Topic: 5WD Quint Uphill Torque via Universal Brushed Washing Machine Motor + Electric Gearing Battery Setup
Replies: 0
Views: 287

5WD Quint Uphill Torque via Universal Brushed Washing Machine Motor + Electric Gearing Battery Setup

Hello Folks Actually let me correct it may not be a quad after all but a convertible _Quint_ with trike and quad option my concern is uphill torque for a heavy 3 person pedeling quint - now that is a quad with a tadpole center wheel. It will sport heavy direct drive 1000W BLDC Motors in each front w...
by usertogo
Apr 18 2019 4:22pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 23583

Re: Steel-geared hub motor?

circuit wrote:
Apr 18 2019 2:06pm
I have welded my bafang. All fine.
Yes but how did you accomplish that? My clutches are relatively thin steel plates on the outside and only the axis turns everything else is hidden in between. Do you have any pictures, or can you describe what was your guiding insight?
by usertogo
Apr 18 2019 12:55pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 23583

Re: Steel-geared hub motor?

IMG_20171125_172704Trio-web.jpg I wonder have any of you ever found a good way to lock the clutch? I must have killed 3 or 4 clutches and effectively stopped using the motors (I might have them as hub) but use a direct drive motor on the other axis. I want to experiment with converting them to 'gea...
by usertogo
Dec 14 2018 6:48am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I used a TI Tiva-C because I had that lying around, but I plan on using an ESP32 that I'll hide in the PSU for adjusting parameters over bluetooth. Tiva-C: http://www.ti.com/tool/EK-TM4C123GXL ESP32: https://www.aliexpress.com/item/ESP32-ESP-32-Development-Board-Wireless-WiFi-Bluetooth-Dual-Core-CP...
by usertogo
Nov 30 2018 12:44pm
Forum: Battery Technology
Topic: Revolutionary BMS & Battery Interoperability Standard
Replies: 0
Views: 496

Revolutionary BMS & Battery Interoperability Standard

Observing great progress on many fronts this 'group mind' puts its consciousness @ I consider it time to create the proper discussion thread for an Idea I have been pushing: https://prezi.com/qibqej3sqqy1/open-source-battery/ :mrgreen: It is always sad to not see each cell of a battery treated to it...
by usertogo
Nov 27 2018 7:19am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

There is a Chinese guy selling the programmer boards for about 12$ on Taobao https://2.taobao.com/item.htm?id=565948826876&ft=t&toSite=main If you are having difficulty ordering it then you can use a third party service like Taobao Focus. They will order it for you and ship it to you. https://buy.t...
by usertogo
Nov 27 2018 6:42am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Nice! Good thing I've already placed my order @dutchrfshop for one of these PSUs :mrgreen: And I've also ordered some ESP32 dev boards + TJA1050 CAN transciever from AliExpress and will be making open source firmware to control the PSU through CAN. With the ESP32 that means you could control the PS...
by usertogo
Nov 26 2018 4:03pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I am going to test pulling them down to GND and report! Huawei-R4850G2completePinout.png The good news is I connected the 2 board detection pins together and pulled them down to the negative 48V (GND) and that was all that was required to get the unit to power up and deliver the proud 53.5V output!...
by usertogo
Nov 26 2018 8:44am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 94
Views: 16569

Re: OpenEMoto

I've a new video but isn't something cool. I had a crash and broke my Marzocchi 380. Check this topic https://endless-sphere.com/forums/viewtopic.php?f=2&t=92618 The crash was big, but only impacts with the floor. Still my fork left bottle is bent in some way, and the stanchion can't slide. I feel ...
by usertogo
Nov 25 2018 4:44pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Thank you indeed you found the definition of the 2 unidentified pins https://translate.googleusercontent.com/translate_c?act=url&depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&sp=nmt4&tl=en&u=https://forum.huawei.com/enterprise/zh/thread-361081.html&xid=17259,15700023,15700124,15700...
by usertogo
Nov 25 2018 8:00am
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 1993

Re: Converting an inverter welder into a charger (and welder)

Thanks for that info. The huawei price/power looks very good. https://es.aliexpress.com/item/New-and-original-Huawei-R4850G2-rectifier-module-48V-56A-communiction-power/32818030744.html In the meantime, i've brought a dedicated 80usd DC welder. I've taken 1500W from it without halts. I will try to ...
by usertogo
Nov 23 2018 3:35pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 1993

Re: Converting an inverter welder into a charger (and welder)

I would recommend something like this: Eaton APR48-3G Rectifier Module ... You can mod it to go as low as 42V (10S) and as high as ~90V (20S) I think there is a bit of disinformation in it too, because its not the APR48 that can go up to 90V, but this switch mode input booster that a certain motor ...
by usertogo
Nov 20 2018 10:25am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I have searched a lot and entered into the world of these communication power supply cabinets... I found that they usually contain LiFePo batteries, and the supplies can charge as well as supply the continuous operational current. With half a million hours MTBF ( https://www.cdiweb.com/datasheets/hu...
by usertogo
Nov 12 2018 6:09pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I have been advancing, meaning I found the box and wired power in, I get the green LED after boot, with a feeler voltage of about 1V on the output, but no more... DSC_0154web.JPG From a question posted on Piclist i got a hint that those are actually chargers from conception, so I applied logic as su...
by usertogo
Nov 11 2018 2:23pm
Forum: Battery Technology
Topic: transport friendly Adaptto charger -Eaton 1,8kW in Peli case
Replies: 16
Views: 3354

Re: transport friendly Adaptto charger -Eaton 1,8kW in Peli case

The charge mode of Adaptto controllers is a very nice feature because it makes it possible to use one charger (PSU + coil) for many vehicles with different battery configurations. I decided to use the Eaton APR-48-3G server PSU. Like the name says it has 48v nominal so it should be possible to char...
by usertogo
Nov 10 2018 5:53pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 1993

Re: Converting an inverter welder into a charger (and welder)

I would recommend something like this: Eaton APR48-3G Rectifier Module ... You can mod it to go as low as 42V (10S) and as high as ~90V (20S) All for about 100€ I like it, and already put one on order, found an original Eaton for little over €60 delivered; meanwhile I am also working on the Rectifi...
by usertogo
Oct 23 2018 3:12pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 79
Views: 12882

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

DSC_4382web.JPG DSC_4375web.JPG DSC_4374web.JPG These pictures show a very well designed SMPS using high quality inductors and other components. One one side the Line input is carefully conditioned till it ends up in 2 fat 470uF 450V capacitors, from there it returns on the opposing side and with m...
by usertogo
Oct 22 2018 9:06am
Forum: Battery Technology
Topic: diy mobility solar versus the best available solutions
Replies: 0
Views: 316

diy mobility solar versus the best available solutions

Be patient with this thread, it will probably take a long time to get to any real solution, other than for example that Laurin Hahn from Sono Motors comments that his solar polycarbonate surfacing on the first attractive solar car invented in Germany - is more economical than a good paint job! So th...
by usertogo
Oct 08 2018 8:32am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 342
Views: 50802

Re: Cooling Effect

A fun theoretical question is whether the energy needed to actively cool the panel would be more or less than the energy gained from increased output. I have found myself visualizing liquid cooling sitting under my solar canopy, especially in parts of the world where the heat not be considered an e...
by usertogo
Oct 08 2018 8:20am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1273
Views: 147214

Re: bluetooth BMS?

Appreciate your feedback. ... I am at the limit of my diagnostic capabilities. I don't know how to analyze the board components themselves and I am not personally interested in learning how to do that. I am going to order a different charger and different BMS to see what happens with different comp...
by usertogo
Oct 05 2018 4:40pm
Forum: E-Bike Technical
Topic: What size nut fits on a Crystalyte x5304 front hub axle?
Replies: 25
Views: 5538

Re: What size nut fits on a Crystalyte HS3525 hub axle?

Sorry to use the number of knowledgeable observers here to ask about a different Crystalyte... Is it possible that the HS3525 uses inch based threads? I measure at the outside of the threads 12.5mm diameter, and ergo the M12x1.25 nuts I have don't fit! I did measure that the pitch is approximately 1...
by usertogo
Aug 26 2018 1:59pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 342
Views: 50802

Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar

Was this really just an excuse to say "leftist" a lot? Your concern seems misplaced since they caught their flight out of Tehran many weeks ago. The story about the couple sounds like some fake news fabrication - they announce what they want to prove and even if they had been real the controlling s...