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by larsb
Aug 23 2020 10:09am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115563

Re: Votol EM-100 & EM-150 controllers

My votol stopped working today. Reason turned out to be a broken unprotected splice hidden in the main cable sleeve that connected to the throttle +5V I found it when bike suddenly started working when i tried to program (then USB fed +5V through the splice to the throttle :D ) 48F99570-8B1C-45BE-9...
by larsb
Aug 18 2020 12:55am
Forum: E-Vehicles General Discussion
Topic: Votol EM-200 Controller
Replies: 46
Views: 4332

Re: Votol EM-200 Controller

JJ848 wrote:
Jul 08 2020 7:10am
I heard the the EM-200 had some issues but as I understood they are all sorted now, I hope I don't have a faulty one.
How did you learn em-200 issues are sorted out? Have only seen trouble so far on this controller.
by larsb
Aug 17 2020 4:32am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

You'll never get it, even if mods all lash me with the cat-o'-nine-tails :D
by larsb
Aug 17 2020 3:11am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

New controller installed. I replaced the main area of the enclosure lid with an alu sheet for better heat transfer, left a little bit of the clear plastic on the rear for receiver and bms signals to go through and to be able to see the controller status lights. 015AC4CE-A979-45B8-A664-B616CEF02F9F.j...
by larsb
Aug 16 2020 6:59am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Yamaha FZR-8000 Genesis
Replies: 61
Views: 12303

Re: Yamaha FZR-8000 Genesis

Nice, probably 1000x better quality than the chinesium ones..
by larsb
Aug 14 2020 10:07am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115563

Re: Votol EM-100 & EM-150 controllers

it's described on first page in this thread.
You also need to remove Park lock mode on most controllers delivered lately, also described in thread.
by larsb
Aug 12 2020 2:40pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115563

Re: Votol EM-100 & EM-150 controllers

If you don’t know it’s on, why flip it?

I’d increase difference between sport and normal mode until you notice.
by larsb
Aug 12 2020 1:44pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Controller busted on last session.. It's nice to have the big board, paddling back was OK. Controller had three years use which is sort of 60-70 years old in controller years.

Maybe it got corona as well, i think i heard it coughing before it died. Getting a new one tomorrow :D
by larsb
Aug 10 2020 2:46am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115563

Re: Votol EM-100 & EM-150 controllers

Try without HDC. I think 4500 flux weakening sounds high to start with. Nobody got a screenshot of reccomended settings that does actually work? You could try the settings from the manual. If you have too high field weakening or the wrong phase angle setting you can get the issues you describe with...
by larsb
Aug 07 2020 12:40pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 1155
Views: 115563

Re: Votol EM-100 & EM-150 controllers

Yeez, you won’t get any answers with that background info.
by larsb
Aug 06 2020 6:57am
Forum: Items for Sale - New
Topic: QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China
Replies: 1396
Views: 286429

Re: QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

That three wheeler and that motor with those small wheels - it will be crazy to the point of not being driveable :wink:
by larsb
Aug 04 2020 8:26am
Forum: General Discussion
Topic: Higher temperature hall-effect sensors
Replies: 7
Views: 573

Re: Higher temperature hall-effect sensors

Although it might seem like an easy fix at this point your hall sensors are telling you that you need to change your system. Just get a bigger motor or a smaller rear wheel or a geared setup and use it for years without hickups. Motors shouldn’t be hall sensor cooking hot in everyday use 8)
by larsb
Aug 03 2020 8:43am
Forum: E-Bike Non-hub Motor Drives
Topic: qs 1000w builds
Replies: 57
Views: 4878

Re: qs 1000w builds

That's possibly not an issue if you cut the original sprocket down enough in diameter. I doubt it will fit on the inside though, isn't it pretty tight already?
by larsb
Aug 03 2020 8:08am
Forum: E-Bike Non-hub Motor Drives
Topic: qs 1000w builds
Replies: 57
Views: 4878

Re: qs 1000w builds

just buy a hubless sprocket and make the hole oversize, they are called platewheels or sprocket "type A".
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by larsb
Aug 03 2020 7:51am
Forum: E-Bike Non-hub Motor Drives
Topic: qs 1000w builds
Replies: 57
Views: 4878

Re: qs 1000w builds

It’s a bad idea for long term. Bolt the sprocket you want to the outside of the sprocket that fits, if needed cut it down with an angle grinder. 1 hour job at the most :D
by larsb
Aug 03 2020 5:34am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Made a cradle for the controller with some angle brackets, to keep it in place during riding and maintain heat exchange to the outside of the box.
0F5D442D-3956-4803-B0A6-B9A9791300D7.jpeg
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by larsb
Aug 03 2020 2:08am
Forum: E-Bike General Discussion
Topic: Show Us Your Homemade Battery Housing
Replies: 587
Views: 181538

Re: Show Us Your Homemade Battery Housing

Ultra clean build there :thumb:
by larsb
Aug 01 2020 1:52pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Block will be connected to the outside water through an alu plate so the heat has somehere to go, if that doesn’t work i’ll get active water cooling. I like simple systems so it will have to evolve only as needed :wink: 5FE6D682-6153-4A97-B2A4-574B4ADB8061.jpeg And.. I’ll post videos when i’m at pro...
by larsb
Aug 01 2020 12:57pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Improving the heat management of the controller: mounting a 400g alu block with heat paste between the two. Simple, crude but effective for a while :D
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by larsb
Jul 30 2020 1:11pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

I don’t think it’s really so hard that it’s needed, i just need some practise :D I think the key is to have the board planing and just do small lifts/flights at first, then the water just catches you without a crash instead of smacks you and you get a lot more done :D Btw, i saw a video where the su...
by larsb
Jul 30 2020 7:10am
Forum: Motor Technology
Topic: Is BLDC motor field weakening bad for the magnets?
Replies: 3
Views: 856

Re: Is BLDC motor field weakening bad for the magnets?

Is this bad for the permanent magnets? Should I be judicious with the flux weakening settings on my controller? The field weakening leads to lower efficiency/higher temperature in most ebike motors and can demagnetize neodym during these conditions. Yes, you should be careful with field weakening s...
by larsb
Jul 29 2020 1:31am
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Some things will be updated on the efoil when i’m back home: -Arming switch to be moved to where it doesn’t get knocked off - Heat exchanger plate for controller in side of enclosure - Small wall (hot glue) on bottom of enclosure for stopping battery from shifting during splash Motor updates - filli...
by larsb
Jul 27 2020 2:23pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

Checked efoil weight: 31.5 kg (ready to go with everything on it)

The gong wing, fuselage and stab alone is 3.5 kg, a lot could be saved by going to a different foil.
by larsb
Jul 27 2020 1:52pm
Forum: Electric Watercraft
Topic: ”The barge” efoil build
Replies: 87
Views: 5448

Re: ”The barge” efoil build

I’ll weigh it, good idea! I can already find some optimization points, cutting some kilos won’t be difficult. It’s a bit overbuilt now. I think the foil could be placed more rearwards and board be shorted from 180cm to 150 or so. It should be a bit more rounded off course, now the wind gets it. I’d ...