Search found 33 matches

by AviatorTrainman
Jan 26 2020 11:29am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

Your model looks significantly more accurate than mine, so I won’t bother to upload mine unless people want me to, but some (non-mounting) features are just flat out wrong on mine. See the picture attached to see what I mean here: the center line of the 7mm thick sprocket sits 16.5 millimetres from ...
by AviatorTrainman
Jan 25 2020 11:41am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

I’ve made a rough cad model of the motor in fusion if you’d like me to export it, or I could post a screenshot of the dimensioned end sketch. I don’t remember where I found the image i worked from, but it had enough dimensions that I was able to calibrate and work from it. I was able to 3d print a p...
by AviatorTrainman
Jan 16 2020 11:51am
Forum: E-Vehicles General Discussion
Topic: Electric Outboard Conversion
Replies: 6
Views: 1605

Re: Electric Outboard Conversion

Seconded on the seawater protection - that stuff will kill all your electronics easily if you aren’t careful. Seal it, test the seal, take it out for a spin, then test the seal again. Maybe even install some sort of drain plug to use regularly if you’re confident you can do that without introducing ...
by AviatorTrainman
Jan 10 2020 11:17am
Forum: E-Bike Technical
Topic: MotoTec fat tire bike - can I switch the front and rear wheels?
Replies: 2
Views: 625

Re: MotoTec fat tire bike - can I switch the front and rear wheels?

Usually, they cannot be swapped because the front and rear wheels have different width axles on most bikes, although I don’t know that bike specifically. Although you didn’t ask, my opinion is that you’re better off leaving it rear wheel drive anyway, due to better traction and easier handling.
by AviatorTrainman
Jan 10 2020 11:12am
Forum: E-Bike Technical
Topic: Where would you place a 72v 25ah battery on this frame?
Replies: 22
Views: 1482

Re: Where would you place a 72v 25ah battery on this frame?

Are you sure you’d be able to make it small enough to fit in even 2 of those spots? If you can, please let me know, because I’m struggling with figuring out where to fit twice that on a small motorcycle. If it does fit, I’d go for 4 and/or 2, but 2 is less ideal when you factor in how far back the w...
by AviatorTrainman
Jan 10 2020 10:45am
Forum: E-Bike Technical
Topic: Amazon 1000 watt 48 v rear hub motor wonky performance
Replies: 2
Views: 732

Re: Amazon 1000 watt 48 v rear hub motor wonky performance

If you have a setup where everything works properly in reverse, (which it seems you have when the learning wires are connected), all you should have to do is reverse 2 of the phase wires. Those are the thicker wires going to the motor, and there should be 3 of them. Swap 2 of them with each other, s...
by AviatorTrainman
Nov 11 2019 8:10pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

Hey, so I'm trying to figure out controllers. I'm having trouble finding the Votol 200 for sale anywhere, and the aliexpress QS motor comes with the votol 150sp, if any. So for 100 USD over the price of the motor with a votol 150, I can get the motor with a sabvoton 72200. Is this controller compati...
by AviatorTrainman
Nov 05 2019 12:37am
Forum: Battery Technology
Topic: Can I trust these high-power ebay cells?
Replies: 6
Views: 518

Re: Can I trust these high-power ebay cells?

john61ct wrote:
Nov 04 2019 8:26pm
Is that really so cheap for used cells?
Where might I find a better deal? I'm not seeing much that has a comparable $/Wh ratio.
by AviatorTrainman
Nov 04 2019 6:51pm
Forum: Battery Technology
Topic: Can I trust these high-power ebay cells?
Replies: 6
Views: 518

Can I trust these high-power ebay cells?

I was trolling ebay looking for some possible cells for my electric motorcycle conversion, and found this: https://www.ebay.com/itm/84-SPIM08HP-3-7V-8AH-LITHIUM-ION-BATTERIES-25C-200A-SUPER-CELLS-CUSTOM/202814938579?hash=item2f38b65dd3:g:MuYAAOSwDkVaakSh . Can I trust these cells? The description sa...
by AviatorTrainman
Nov 04 2019 1:39pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

Okay, good to know. Also, does anybody know the dimensions of the version with the new case? I mostly would like to know the bolt size and separation. Also, is the new one just the old version in a plastic case, or is it actually a different motor in some way?
by AviatorTrainman
Nov 04 2019 1:08pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

Those of you who have ordered this motor, does it come with a controller? The product listing at http://www.cnqsmotor.com/en/article_read/QSMOTOR%203000W%20138%2070H%20electric%20bike%20mid%20dirve%20motor/873.html has a picture of a votol 100 but does not mention it in the description. Is this cont...
by AviatorTrainman
Apr 05 2019 12:47pm
Forum: E-Bike Technical
Topic: Q100H vs SWXH
Replies: 7
Views: 560

Re: Q100H vs SWXH

I mean to say that the no-load speed is around 25 mph. I am actually an electrical engineering student, so I'll have to track down those graphs, if for no other reason than to learn by looking. I've figured out everything except the motor, essentially. I have a source for spokes, I'll be using a 20 ...
by AviatorTrainman
Apr 04 2019 8:51pm
Forum: E-Bike Technical
Topic: Q100H vs SWXH
Replies: 7
Views: 560

Re: Q100H vs SWXH

Thanks for the fast response. I suppose I should word my question more carefully regarding torque - I want to know how much torque each of them would produce at 20 amps. I have a Q100c that I run at 22 battery amp peaks, and I'm aware that the Q100H produces 30% more torque than mine does for the sa...
by AviatorTrainman
Apr 04 2019 7:04pm
Forum: E-Bike Technical
Topic: Q100H vs SWXH
Replies: 7
Views: 560

Q100H vs SWXH

Hi all, I'm going to be doing a second ebike conversion, this time on my dad's bike, and I'd like some advice regarding motor choice. I think I have it narrowed down to essentially the SWXH or the Q100H, both in the 260 rpm winds. I'd be running them at 48 volts in a 26" inch wheel for a ~25 mph (40...
by AviatorTrainman
Mar 27 2019 5:54pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

Okay, so using the code given above, and tweaking a few of the throttle voltage values to more precisely match my throttle, I am happy with the project as it stands. I have been using this to go everywhere for some time now, and I can happily say I have found no glitches, and it works just fine. The...
by AviatorTrainman
Mar 27 2019 5:47pm
Forum: Battery Technology
Topic: Nkon refurbished cells any good?
Replies: 3
Views: 485

Nkon refurbished cells any good?

I saw recently on Nkon's website that they have refurbished cells available. Does anyone have any experience with these cells? The pictures they had showed spot weld marks on the ends, but made no mention of capacity, aside from manufacturer ratings. Do these refurbished cells perform as well as the...
by AviatorTrainman
Mar 19 2019 12:26pm
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 531
Views: 67191

Re: QS 3000w midmotor

larsb wrote:
Mar 19 2019 12:46am
It's not had any issues yet even though i ride at 300A, but i run on road.
Is that 300 Amps battery current? How long do you typically sustain that?
by AviatorTrainman
Mar 16 2019 7:48pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

I've updated my previous posts with the photos as attachments. I've ordered some of those cardboard rings on amazon, so they should be here by this time tomorrow. I'll rebuild the pack as 12s (since all but 2 cells are fine) and do some more extensive testing of the functionality as it stands, to se...
by AviatorTrainman
Mar 15 2019 1:23pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

Bad news, I won’t be able to test for a while. I’ve been having battery issues since late February, like cutting out over speed bumps, and I figured it was a loose connection. I opened up my battery today, and found this: https://imgur.com/gallery/wDPgJwY 98pTXPv_small.jpg I count myself extremely l...
by AviatorTrainman
Mar 15 2019 12:27pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

AFAIK it also has analog outputs: https://www.allaboutcircuits.com/projec ... analog-io/ I suppose there are different models and maybe what you have doesn't have any analog outs, just analog ins? Yes, that’s right. That article says farther down that the Arduino doesn’t actually have a true analog...
by AviatorTrainman
Mar 15 2019 12:25pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

So, if the throttle is demanding 100A, and actual current is 0A, then the controller sets throttle to demand 50A, and checks the actual current and the throttle demand. Then if the demand hasn't changed, and the current is at 50A, it then increases throttle output to demand 75A, and so on. While I ...
by AviatorTrainman
Mar 14 2019 10:57pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

If you attached the non-contact current meter to one of the phase wires wouldn't you then be controlling phase amps rather than battery amps? I as far as I can tell, yes. You would just need a function in the program to take the DC equivalent of the AC current there. I've updated my code with both ...
by AviatorTrainman
Mar 14 2019 8:14pm
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Re: Making a torque throttle instead of a speed throttle for a cheap controller

My bad, the "this one" was supposed to be a link. I'll update the original post to include it. What you say about mapping the voltage to a current value is exactly what I've done with the code. The reason I use a PWM signal is simply because that is what the Arduino (a microcontroller) has to offer....
by AviatorTrainman
Mar 14 2019 12:25am
Forum: E-Bike Technical
Topic: Making a torque throttle instead of a speed throttle for a cheap controller
Replies: 13
Views: 911

Making a torque throttle instead of a speed throttle for a cheap controller

Hello all, I recently made this device and thought I'd share it with the community, both to help others and to possibly get others to help me. Essentially, it's an Arduino hooked up to the signal from the twist/thumb throttle, a PWM smoothing circuit which is in turn connected to the throttle signal...
by AviatorTrainman
Feb 19 2019 2:30pm
Forum: Motor Technology
Topic: Simple motor controller
Replies: 4
Views: 619

Re: Simple motor controller

This should be fine to supply whatever voltage you like to the motor, so long as the voltage to the 555 does not exceed 16 volts, and the two supplies share a common ground. The 555 is in fact fed directly by the 12 volt supply in this schematic, and the 1k resistor serves as part of a voltage divid...