Search found 1155 matches

by j bjork
Nov 30 2021 8:46am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1743
Views: 204246

Re: Votol EM-100 & EM-150 controllers

I have an older version, I can set sport and busbar current independent of each other. From what I have seen it is not about battery current, so I guess it is just how fast current rises. In low speed I dont reach any battery current limit anyway. I already have max settings on phase A, I dont think...
by j bjork
Nov 30 2021 6:50am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1743
Views: 204246

Re: Votol EM-100 & EM-150 controllers

I just did some testing by changing high speed port to sports input, and it shows “S” in display page, but no change. Still 30a, same as high, which is my sports mode current limit. No change in throttle response? For me there is a lot of difference, even with the same A settings and 250 or somethi...
by j bjork
Nov 30 2021 1:20am
Forum: EScooters/EMotorcycles
Topic: Best controller for QS138 V3 70
Replies: 5
Views: 284

Re: Best controller for QS138 V3 70

Ahum, I know I have seen at least 370A drawn from the battery on my 138 70h/ em150sp combo.
That is at high rpm with a lot of FW though, but at lower rpm I had at least 300bA.
by j bjork
Nov 30 2021 1:06am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1743
Views: 204246

Re: Votol EM-100 & EM-150 controllers

If i added a row of buttons and switches to my handlebars i could add sport mode, but i dint know what I would gain since gear 3 already seems ro be using sport mode current limit. Just test it by connecting it to ground. On my older controller it sure has effect, even with the same settings. It is...
by j bjork
Nov 27 2021 5:42am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZ250F

Step one of the models done:

Image

Image

Now it is time to start rounding edges..
by j bjork
Nov 20 2021 5:44am
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 144
Views: 7893

Re: Conversion of a Bultaco Sherpa

If you have a bms that you can turn off, then the negative switch is defiantly not necessary. I dont know if I should bother with double switches either way. However, I would probably put some sort if pre charge circuit in there. The bms might be able to handle that part. But if you want to take the...
by j bjork
Nov 20 2021 5:21am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 172
Views: 36004

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

Thanks for allowing me into the forum. After skimming many posts I have not yet found if the R4850G2 can be modified to go beyond 58V. Actually I need 65V (or 67V) to charge my 16S - 600A lithium pack. If it can't, my plan is to use 48V setting and a number of CC boost converters. The drawback here...
by j bjork
Nov 19 2021 4:10am
Forum: Battery Technology
Topic: Charging Battery Arrays with PSUs - Please Verify
Replies: 2
Views: 104

Re: Charging Battery Arrays with PSUs - Please Verify

Based on what I have read, I am under the impression that one benefit of using a BMS is that I can run the output of an appropriately rated power supply into the charging jack of the battery case and then the BMS will monitor the charging and handle the balance charging to top off the pack. Is this...
by j bjork
Nov 18 2021 5:49am
Forum: EScooter/EMotorcycle Build Threads
Topic: '91 Suzuki DR 250S
Replies: 18
Views: 522

Re: '91 Suzuki DR 250S

Check at the right riding height, but also test the whole range by taking off the spring. The motor should probably sit lower than you might think, on the ktm I have more wear on the underside on the chain guide than the upside. But it is just at the pivot point, so it is probably from when the susp...
by j bjork
Nov 18 2021 2:26am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZ250F

Well, I wouldn't do it again now when the v3 of the qs 138 70h with built in gear reduction is available. If I started over with this build I would probably go with that on this one too. It would save a lot of time, money and weight. And I think hit with a big enough stick (high A and V) it would pr...
by j bjork
Nov 16 2021 1:40pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZ250F

louis raaijmakers wrote:
Nov 15 2021 8:35am
brilliant build!

after reading this tread i am going to back that idea off :roll:
Thank you :)
But why dont you want to build a dirtbike after reading this thread?

L.E.S wrote:
Nov 15 2021 10:08pm

Also random question but are you using jackshafts on both of your bikes?
No, not on the ktm.
by j bjork
Nov 15 2021 3:08am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1743
Views: 204246

Re: Votol EM-100 & EM-150 controllers

start voltage is the voltage where you want the motor to start.
"End of the" is where you want full throttle to happen.

Measure the voltage from your throttle and determine at what voltage you want it to start.
by j bjork
Nov 13 2021 10:16am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZ250F

Any reason why not some type of foam? or is it the obvious that it is quicker using materials nearby? (or maybe a kink for hot glue) :lol: Thank you, I haven't really looked in to how to use foam for something like this. And I don't hove any experience in it. I have seen it used when a guy made his...
by j bjork
Nov 12 2021 3:24pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZ250F

Hi Just found this forum and this thread. This build looks awesome! I'm in the fantasy/planning stage of a (prototype) build of my own so just trying to learn stuff and see what engines/batterys/controllers you guys are using. I'm located some 120km northwest of you so if possible I would really ap...
by j bjork
Nov 12 2021 2:53pm
Forum: EScooter/EMotorcycle Build Threads
Topic: KTM 200 exc goes electric
Replies: 252
Views: 46739

Re: KTM 200 exc goes electric

There hasn't been a lot of riding after the accident. First there was a few weeks for healing. I fixed the bike and we rode once. It was a little scary at first, but it was ok after a little while. But then I got sick and we had a break again. We were supposed to ride this weekend, but now my friend...
by j bjork
Nov 09 2021 12:34pm
Forum: EScooters/EMotorcycles
Topic: 4kw QS hub motor - More power
Replies: 7
Views: 570

Re: 4kw QS hub motor - More power

If I added some LiPo’s to the current battery as J bjork has suggested would I still use the one BMS? You have a few options in how to do it. 1: You can use the lipos in parallel with your battery, with no bms on the lipos and the bms you already have on the battery you already have. Then you wont b...
by j bjork
Nov 09 2021 6:47am
Forum: Large EV General Discussion
Topic: streetlegal crosskart/buggy build 140hp
Replies: 35
Views: 2327

Re: streetlegal crosskart/buggy build 140hp

I only know about using an ixxat (or what it is called) can adapter and dvt software. You need a license for the dvt, but it is the can adapter that is expensive. I think you can keep the rest of the settings, and just change the ones you want. But it depends of if zero has a password protection or ...
by j bjork
Nov 08 2021 8:43am
Forum: Large EV General Discussion
Topic: streetlegal crosskart/buggy build 140hp
Replies: 35
Views: 2327

Re: streetlegal crosskart/buggy build 140hp

You should be able to run the controllers in master/slave mode, at least if they are sevcon gen 4.
by j bjork
Nov 07 2021 1:26pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZF250F

Time to make some more fiberglass parts while I'm trying to find someone to make my shaft :? I started with the top, in front of the seat. After some tries I settled on a design: https://i.imgur.com/hTHUJad.jpg Something like this, now on to a endless filling and sanding. This is how it ended up: ht...
by j bjork
Nov 06 2021 3:30pm
Forum: Battery Technology
Topic: Trying to make a 52v in Hailong3
Replies: 5
Views: 209

Re: Trying to make a 52v in Hailong3

I dont really see the point of buying re wrapped cells. They are usually either a quality cell that are a little more expensive than the original, or just any cheap cell re wrapped. They can of course change at anytime. I checked mooch reviews, but it seems like he hasn't tested this cell. The close...
by j bjork
Nov 05 2021 8:44am
Forum: EScooters/EMotorcycles
Topic: how to program a sevcon gen4
Replies: 370
Views: 103894

Re: how to program a sevcon gen4

Has nobody set up 3D tables for IPM motors?
by j bjork
Nov 05 2021 6:46am
Forum: EScooters/EMotorcycles
Topic: 4kw QS hub motor - More power
Replies: 7
Views: 570

Re: 4kw QS hub motor - More power

Turn off HDC and test.
And read the votol thread before you make changes to the right flux settings.
by j bjork
Nov 05 2021 6:40am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZF250F

Quick question for: does your version of the QS180 have an encoder or hall sensor? QS just told me that my Qs180 will use an encoder. It is encorder. Do you mean that my early model with 3 digital outputs have the same encoder as the new model? So in that case it is 3 digital outputs on the new mod...
by j bjork
Nov 03 2021 6:55am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 238
Views: 17215

Re: Yamaha YZF250F

My motor has 3 digital signals, like from hall sensors. So I guess that is what it is. I saw that comment in the qs sales thread and wondered what it meant exactly. Do you know if it is supposed to be an analog encoder with sin and cos signals? They seem to use a fardriver controller, but I havent s...