Search found 1164 matches

by larsb
Oct 18 2019 9:47am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

Hello larsb, I am still here, but not experimenting anymore, just ride. :bigthumb: Glad to hear you’re riding, i was a bit worried that you got issues and lost all interest in the EVs. I am also dropping out from ES for a while, currently in the process of building a foil board so don’t have time t...
by larsb
Oct 16 2019 3:30pm
Forum: E-Bike Non-hub Motor Drives
Topic: drone pancake motor low reduction mid drive with regen
Replies: 14
Views: 3250

Re: drone pancake motor low reduction mid drive with regen

Numbers give 76% efficiency at 8550w input - horrible. To get 3 minutes of 9.9kW (which they state as max) will result in even lower efficiency: at an assumption of 70% efficiency about 3kW of heat has to be removed or it will be put into motor temp increase. It’s too high for such a small motor, ev...
by larsb
Oct 13 2019 3:05pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

I don’t know root cause 100%. Jonnydrive had similar issues and got it solved when using a different program. He doesn’t seem to be posting here anymore. that controller still works intermittently and i haven’t tried doing the same. Doesn’t seem logical. I use a new Votol controller now, set at 250A...
by larsb
Oct 13 2019 1:43am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

According to QS motor there is no bluetooth (i asked long time ago), i think it could be in other version of this controller. Looking at the chinese taobao i found a lot of controllers that has the same outside.
by larsb
Oct 12 2019 2:38am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

Cruise: read the manual. It's clearly described here:
cruise.JPG
cruise.JPG (38.31 KiB) Viewed 139 times
brown cable: pin's empty on my controller, cannot help with this one
CAN: circuit diagrams are the same with and without CAN, i think you won't be able to know without opening the program
by larsb
Oct 11 2019 1:16pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

can you show picture of the diagram you refer to. Brown wire is not in the original one.
by larsb
Oct 02 2019 3:32pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 287
Views: 25723

Re: QS 3000w midmotor

never opened one but the windings should be reachable from the harness side if you remove complete side cover (not the hall sensor cover)
by larsb
Oct 02 2019 12:14pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 287
Views: 25723

Re: QS 3000w midmotor

Yes, never actually gotten it warm on the outside, 100-120A won’t be an issue.
by larsb
Sep 27 2019 5:05pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 287
Views: 25723

Re: QS 3000w midmotor

Yes. 590Nm is 590Nm, can’t go wrong there. Worst thing that could happen is that you want more, buy another motor, put it on the same axle for 1200Nm. That’ll be enough :wink:
by larsb
Sep 27 2019 4:02pm
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 451

Re: magnets held without glue?

since you need space from coils towards the rotor sideplates to reduce eddy losses you can extend the magnet but not the stator
by larsb
Sep 27 2019 3:58pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 720
Views: 33157

Re: APL's DIY axial-flux motor

These might be of interest, even found a doctors thesis on powder core motors but it was too large to upload :D 10.1.1.847.9796.pdf 10.1.1.882.1738.pdf 55_Experience-ATOMET-SMC-55.pdf worldpm_2018_design20and20implementation20of20smc20components20for20an20automotive20electric20water20pump_pennander....
by larsb
Sep 27 2019 7:48am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 720
Views: 33157

Re: APL's DIY axial-flux motor

Sorry for being lazy, and not doing the research, but I guess I'm not getting the Bsat rating completely yet. Bsat's on the chart for different mix's, rated in Gauss, 18,400G being 1.84 Teslas, needs to relate to something for me. Is it for a partial, a cubic mm, cubic centimeter, etc.? Or the poin...
by larsb
Sep 26 2019 3:50pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

It’s great, I’ve had 6 different brands of controllers, none of them beat this in price/performance ratio. I would also consider nucular controller sold by vasilisk here at ES. Not as cheap but they seem excellent. Buy from cnqsmotor.com, more likely to get the latest version of the controller than ...
by larsb
Sep 26 2019 2:43pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

There is three speed setting function, activated by switch so yes, it's possible.
by larsb
Sep 25 2019 2:09pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 720
Views: 33157

Re: APL's DIY axial-flux motor

If i remember it correctly :wink: max efficiency is reached when copper losses equal iron losses. That and your dimension restrictions and power goal can be used to set the frame for your motor, after that it's iteration time :D with razor thin laminations and segmented magnets you might be tempted ...
by larsb
Sep 25 2019 11:27am
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 451

Re: magnets held without glue?

I should dig up the info i have on this, hopefully i can find it in the gazillion papers i have downloaded.

I guess it is not done for most motors as they are optimised for cost
by larsb
Sep 24 2019 4:44am
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 451

Re: magnets held without glue?

Magnets should be roughly (stator width + 2x magnet thickness) wide to catch most of the available flux.

You’d need some added rotor width to fit a keeper ring and the sideplates, ring would give extra stiffness to the rotor as a bonus
by larsb
Sep 23 2019 3:06pm
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 451

Re: magnets held without glue?

I’d worry more about damaged surface treatment from the clamping of the ring than alu integrity. It’ll work.
by larsb
Sep 23 2019 1:26pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 140km/h 11kw motorcycle battery calculations, HELP!!!
Replies: 5
Views: 414

Re: 140km/h 11kw motorcycle battery calculations, HELP!!!

I own two revolt motors and the qs3000w mid drive, both revolts are low quality, seller is not to be trusted. I am really happy with the QS 3000W motor, it’s a bargain. I don’t think it can do 140km/h continuously though, QS specs it at 100km/h and it takes more than double the power used at 100km/h...
by larsb
Sep 23 2019 1:03pm
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 451

Re: magnets held without glue?

Since IPM motors puts the magnets in the steel it’s somewhat similar to your question but then the steel is laminated. If you’re at a reasonable distance from the coil fields it’ll work with a metal keeper ring without creating excessive losses but i think having a steel keeper ring would short out ...
by larsb
Sep 22 2019 4:44pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

It’s called EBS in the program.
by larsb
Sep 21 2019 3:29pm
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

should be possible to get regen to work with low brake - if only the program makers had handled program versions and revisions in a clear way. Now there are several program variants that have different parts of the code unfunctional. I think playing too much with ports settings might brick the contr...
by larsb
Sep 21 2019 11:31am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

I tried it. doesn't work, can't be sure if it's my controller and program as it is older than yours. I checked the files and wiring diagrams you had gotten - they all connect 12V to brake switch to high_brake/purple wire so i will try this.
by larsb
Sep 21 2019 10:53am
Forum: E-Vehicles General Discussion
Topic: Votol EM-100 & EM-150 controllers
Replies: 320
Views: 18103

Re: Votol EM-100 & EM-150 controllers

Normally regeneration is connected to the brakes. It is high-level and has a green cable at the 8th output of the plug. I do not know where it is activated and how it is set up. do you have no regeneration function? It comes with the brake applied. These are the settings of my engine. I don't know ...