Search found 492 matches

by j bjork
May 23 2020 3:51am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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

Hmm,I am not sure if I understand. Do you mean that you need to connect the control board to a computer with this usb tool to change the default settings?
by j bjork
May 22 2020 11:25am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

I have done some work on the bike too. Let there be light: https://i.imgur.com/immGqZq.jpg https://i.imgur.com/NMNojLQ.jpg No brake light yet though. I ordered a switch with some other stuff, but didn't get it. A problem with inventory. https://i.imgur.com/50sIGhY.jpg A little cad* work. (*cardboard...
by j bjork
May 22 2020 11:05am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

Maybe I should show my charger building fail here too. I plan to build a charger by series connect 2 huawei R4850G. Without any regulation they give about 54V and 50A, that is a bit much for me.. https://i.imgur.com/ZtIqPJf.jpg This is what they look like. https://i.imgur.com/Ylnc1NE.jpg Here is a c...
by j bjork
May 20 2020 12:37pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

I went with a quick fix of the key: https://i.imgur.com/OuwWNM1.jpg It should be difficult to bend it now, and so far it has been fine :wink: The wear on the upper corners of the battery covers started to be a problem: https://i.imgur.com/Q7Jpp5J.jpg I marked out the sizes of these: https://i.imgur....
by j bjork
May 20 2020 12:55am
Forum: E-Bike Non-hub Motor Drives
Topic: Rieju 50cc conversion
Replies: 196
Views: 24146

Re: Rieju 50cc conversion

It will be interesting to see for sure :)
How about the dyno? Would´nt it be perfect to test there?
by j bjork
May 15 2020 2:32pm
Forum: E-Bike General Discussion
Topic: Shorten Hub Motor Axle with Sawzall
Replies: 6
Views: 154

Re: Shorten Hub Motor Axle with Sawzall

I am not sure how hard it is, but you can always try. Maybe you will need an angle grinder or something.
There are nothing sensitive in the axle. I would like too keep it to mount torque arms, but on such a small motor it might not be needed.
by j bjork
May 14 2020 12:47pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Ninja 250 "Clone" Made in China
Replies: 60
Views: 14333

Re: Ninja 250 "Clone" Made in China

How is the progress, it has been a long time since the last update :wink:

Interesting build to follow :thumb:
by j bjork
May 14 2020 12:38pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Conversion Honda motorcycle to electric 96v - 8000w hubmotor - 6.3kWh
Replies: 51
Views: 6005

Re: Conversion Honda motorcycle to electric 96v - 8000w hubmotor - 6.3kWh

Yes, this is about what I mean. Only difference is I would like some material on the outside of the clamp, around the axle. That will still keep the wheel in place if you manage to brake the clamping bolts or something. I don't know if it is really needed, it is more of a "gut feeling". It would be ...
by j bjork
May 14 2020 11:24am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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

There are no connection between either positive or negative output and either of the can bus wires, so I guess it should be safe.. At the moment I am a little low on psu:s, so I cant really test :roll: Luckily I bought extras of the control board. It seems to work fine at adjusting the voltage outpu...
by j bjork
May 13 2020 12:00pm
Forum: E-Bike Technical
Topic: batt pack still has volts when switched off
Replies: 4
Views: 134

Re: batt pack still has volts when switched off

I would guess that you get a little leakage through the mosfets in the bms, assuming that the switch is to turn off the bms.
I think that is normal.
Test with a small light bulb or something as a load on the terminals, if you still get voltage it is a problem.
by j bjork
May 13 2020 10:50am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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

I wonder then if it is safe to parallel the can bus from more than one psu? I plan to run 2 psu:s in series, and control them both with one control board over can bus. So the can bus will be connected parallel. From my experience with can bus it should be almost indestructible. You can short them to...
by j bjork
May 12 2020 1:46pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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

I got the control boards today. I went looking for a power supply for the board in the psu. I found the fan had a steady 12,7v, I thought that would be perfect. https://i.imgur.com/99oUnTg.jpg https://i.imgur.com/KH7XDN8.jpg https://i.imgur.com/Ylnc1NE.jpg Well, I connected the board to the 12,7v. I...
by j bjork
May 12 2020 7:42am
Forum: E-Bike General Discussion
Topic: help with powervelocity controller
Replies: 21
Views: 586

Re: how to use powervelocity bt controller?

measuring the voltage accross the batteries disconnected, I get 66v. measuring across the batteries whilst connected, I get 5v or thereabouts. Do you have a bms? It sounds like a bms that turns off for some reason. Can you test the output with light bulbs or something? Can you read or mesure cell v...
by j bjork
May 11 2020 11:29am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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 j bjork
May 11 2020 11:27am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 94
Views: 16550

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

Were you (or someone else) able to find it or something simular? I should soon have to modify 2 of these psu:s, it would be nice to be able to adjust them without the programming. I do not know,,, only china controller.. now I have contact to get it... I have two... no used for now... https://drive...
by j bjork
May 11 2020 8:14am
Forum: Vendor Relations Corner
Topic: E.R.T \ Alan Hu nightmare.
Replies: 23
Views: 769

Re: E.R.T \ Alan Hu nightmare.

arek_arecki wrote:
May 10 2020 5:42am
could you answer or call me and solve the problem with bac8000.
You took my money and sent a product that has defects and cannot be reprogrammed.
It's unprofessional and embarrassing.
Are you talking about the threadstarter or ERT?
by j bjork
May 08 2020 2:26pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Conversion Honda motorcycle to electric 96v - 8000w hubmotor - 6.3kWh
Replies: 51
Views: 6005

Re: Conversion Honda motorcycle to electric 96v - 8000w hubmotor - 6.3kWh

You make nice parts, but I really think you should make it so you can clamp the axle in place. Even if it is tight now, it will probably start to move sooner or later. I would like something like your first design, but with clamps on the inside. Then you would have something that still holds the whe...
by j bjork
May 08 2020 1:54pm
Forum: E-Bike Reviews & Testing
Topic: Sabvoton MQCON review and documents
Replies: 36
Views: 16709

Re: Sabvoton MQCON review and documents

He got banned from the site, and did as much damage as possible before and after. One thing was deleting all pictures, so I don't think he will post them again.
by j bjork
May 08 2020 12:24pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

I'm sure interested in that sprocket, pm sent :) This is some damage from last ride, it is from a crash. But I have no idea how it happened: https://i.imgur.com/9APH2Bm.jpg https://i.imgur.com/wnjqEOO.jpg I thought it was well protected where it is mounted, but apparently not enough. I am thinking a...
by j bjork
May 08 2020 6:43am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

Larsb, Interesting :) Does it fit a 428 chain, or what is your plan? I thought your apt96600 was broken, 30s sounds like a plan :wink: My chain rattles when not loaded, and wines when I hit the throttle. You cant really sneak around like with a hub, but it is silent compared to gasbikes. No videos, ...
by j bjork
May 07 2020 1:13pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

Well, I have 10 tooth front and 70 tooth rear. It is the biggest rear (and smallest front) sprocket I have found. I have been thinking about going 11 tooth front and 75-80 tooth rear, custom made probably in that case. But I don't know how much difference it would make? One advantage with doing so i...
by j bjork
May 07 2020 11:36am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

You did a great job with your build! Very well documented , too. I have to say my favorite image is the one where the little kid is pushing a toy lawnmower around the campsite. Get that little man a toy dirtbike :D I finally got what you mean,it seems like I don't know what is in my own pictures :l...
by j bjork
May 07 2020 11:32am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

What kind of chain are you running? 428? Im running the same controller/motor in an ATV and installed the cheapest biltema 428 chain as a temporary solution (I see your biltema sealer on a picture, so I guess youre from Scandinavia somewhere :) ). To my big surprise it is almost the exact same tens...
by j bjork
May 06 2020 12:33pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: KTM 200 exc goes electric
Replies: 68
Views: 8069

Re: KTM 200 exc goes electric

Thanks,it is always good to know that people appreciate the updates. I don´t think the kid with the lawnmower has anything to do with this thread? :? There is not a lot of news about the bike, but I was riding another endurance track this weekend. 8km of mud, mountains, rocks, roots etc. I did 3 lap...
by j bjork
May 06 2020 5:49am
Forum: E-Bike General Discussion
Topic: help with powervelocity controller
Replies: 21
Views: 586

Re: how to use powervelocity bt controller?

measuring the voltage accross the batteries disconnected, I get 66v. measuring across the batteries whilst connected, I get 5v or thereabouts. Do you have a bms? It sounds like a bms that turns off for some reason. Can you test the output with light bulbs or something? Can you read or mesure cell v...