Search found 1986 matches
- Apr 20, 2018 11:39 am
- Forum: E-Bike General Discussion
- Topic: 2 Speed Xiongda hubmotor
- Replies: 1530
- Views: 146986
Re: 2 Speed Xiongda hubmotor
Bruce Teakle has a new video on you tube "Xiongda 2- speed hub motor with slipping motor magnets" link on the video to his blog on how he fixed it. He was lubricating and cooling the motor with ATF but does not know if the ATF caused the magnets to loosen because he has run another Xiongda with ATF...
- Apr 17, 2018 10:42 pm
- Forum: E-Bike Photos & Video
- Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
- Replies: 33
- Views: 974
Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
If you decide to go without an MPPT controller you'll have to worry about temperatures as well as string lengths and orientations, since Si PV cells have a pretty strong negative temperature coefficient with respect to voltage. You can choose worst-case temperatures and design for that of course bu...
- Apr 17, 2018 10:14 pm
- Forum: EV Business World
- Topic: Tesla Model 3
- Replies: 289
- Views: 17108
Re: Tesla Model 3
Starting today at Giga and tomorrow at Fremont, we will be stopping for three to five days to do a comprehensive set of upgrades. This should set us up for Model 3 production of 3000 to 4000 per week next month. Another set of upgrades starting in late May should be enough to unlock production capa...
- Apr 13, 2018 2:33 pm
- Forum: E-Bike Technical
- Topic: Arc explosion on first time build test
- Replies: 9
- Views: 187
Re: Arc explosion on first time build test
I connected the positive banana plug first. An explosion occurred when I connected the negative . It gave off a very large spark (arc?), I think it was purple in color but I'm not sure since it was momentary. Burnt stuff got sprayed everywhere, and ground zero was covered n soot(?), as were my hand...
- Apr 13, 2018 8:11 am
- Forum: Items for Sale - New
- Topic: 48v 11ah nos boxes of 12 cells
- Replies: 17
- Views: 1264
Re: 48v 11ah nos boxes of 12 cells
Apparently my courier got 2 boxes with, what appears to be, 24 LTO cells. Shipping only took 4 days to Miami. Nice!
Invo, what is the best way to punch the tab?
How do you deal with the oxide layer on the tab, before assembly? (Any procedure or product recommendation)
Thank you.

Invo, what is the best way to punch the tab?
How do you deal with the oxide layer on the tab, before assembly? (Any procedure or product recommendation)
Thank you.
- Mar 27, 2018 10:51 am
- Forum: Items for Sale - New
- Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
- Replies: 1118
- Views: 149376
Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
That´s just what he said. Seems like Im gonna have to sell his 1000 Watt 135mm QS motor and buy a 130mm one instead Yeh, those bolts will definitely destroy the wire. If you do not want to spread frame, just flexing a little while inserting the wheel with washers (not bending actually), then there ...
- Mar 23, 2018 6:38 pm
- Forum: Large EV General Discussion
- Topic: Industrial Motor gokart build
- Replies: 27
- Views: 1391
Re: Industrial Motor gokart build
Yes, that why. I suppose it is 24V/41A=0.585Ohm motor, in dynamic state. At 43.2V/0.585Ohm=73.8A. And finally, 43.2Vx73.8A=3188W.
You certainly can throw all you wish at it, but need to raise the voltage correspondingly.
You certainly can throw all you wish at it, but need to raise the voltage correspondingly.
- Mar 23, 2018 4:23 pm
- Forum: Large EV General Discussion
- Topic: Industrial Motor gokart build
- Replies: 27
- Views: 1391
Re: Industrial Motor gokart build
This controller can peak out at almost 20KW.
I suppose, your motor will deal at ~3KW, right?
I suppose, your motor will deal at ~3KW, right?
- Mar 23, 2018 2:32 pm
- Forum: E-Bike Technical
- Topic: Mobipus Controllers
- Replies: 100
- Views: 7830
Re: Mobipus Controllers
Any news?
- Mar 23, 2018 1:32 pm
- Forum: Items for Sale - New
- Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
- Replies: 1118
- Views: 149376
Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Can you make a picture?
On their (this) page the cable is on chain side BTW.
http://www.cnqsmotor.com/en/article_read_399.html
- Mar 23, 2018 1:20 pm
- Forum: Large EV General Discussion
- Topic: Industrial Motor gokart build
- Replies: 27
- Views: 1391
Re: Industrial Motor gokart build
Nice gokart Quinc!
Why such an overkill on controller?
Why such an overkill on controller?
- Mar 17, 2018 2:22 am
- Forum: Battery Technology
- Topic: Repairing Meanwell Power Supplies
- Replies: 43
- Views: 6393
- Mar 17, 2018 1:33 am
- Forum: Motor Technology
- Topic: 6 wire alternator conversion
- Replies: 10
- Views: 477
Re: 6 wire alternator conversion
They where terminated in star, which is pretty nice. No parasitic recirculating current and you can use higher voltage. I can be wrong, but it looks like the winding sets are shifted, you will need to use 2 controllers in different timing, hopefully they will not interfere/trigger each other. Can yo...
- Mar 17, 2018 1:14 am
- Forum: Large EV General Discussion
- Topic: Nissan Leaf Motor test with DIY controller
- Replies: 85
- Views: 8298
Re: Nissan Leaf Motor test with DIY controller
If you still do not understand the difference, get two rats and electrocute one with 1860V at 7.5A, as used for electric chair executions in the usa, and and the other with 1860A, at 7.5V. I would like the description of the procedure, how to kill a rat with 7.5V with all the calcs related to the p...
- Mar 15, 2018 4:52 pm
- Forum: Motor Technology
- Topic: 6 wire alternator conversion
- Replies: 10
- Views: 477
Re: 6 wire alternator conversion
It doesn't have 6 phases. It's just that the end of the windings hasn't been terminated as Delta or WYE. Do your termination in whichever configuration you desire, leaving you with 3 phase wires. There would be continuity in pairs if the windings are not terminated. He has continuity between 3 wires.
- Mar 15, 2018 11:18 am
- Forum: Battery Technology
- Topic: KWeld vs Arduino Spot Welder
- Replies: 4
- Views: 287
Re: KWeld vs Arduino Spot Welder
In my understanding, KWeld is discharge energy based welder, it does not need 2 pulses and welds will be more consistent, as they do not depend much on contact and time consistency, every weld receives same amount of energy, time is the variable. Time fixed welds can vary from one to other because o...
- Mar 15, 2018 8:45 am
- Forum: Items for Sale - New
- Topic: N.E.S.E. the no solder module
- Replies: 225
- Views: 16612
Re: N.E.S.E. the no solder module
Or just go to Settings>Setting Visibility and in 'Shell' check "Wall line Count","Top Layers" and "Bottom Layers". After that you get new fields in Cura settings list, line count change will recalculate shell thickness automatically. 

- Mar 14, 2018 9:59 am
- Forum: E-Bike General Discussion
- Topic: Battery Choice 10Ah Lithium vs 12Ah Gel/AGM
- Replies: 25
- Views: 642
Re: Battery Choice 10Ah Lithium vs 12Ah Gel/AGM
Just be careful, informed and follow all Li battery rules. BMS is a good thing if you are not experienced.
- Mar 08, 2018 2:59 pm
- Forum: E-Bike General Discussion
- Topic: The ebike parts designing thread with CAD/CAM
- Replies: 117
- Views: 4787
- Mar 08, 2018 1:30 pm
- Forum: E-Bike General Discussion
- Topic: The ebike parts designing thread with CAD/CAM
- Replies: 117
- Views: 4787
Re: The ebike parts designing thread with CAD/CAM
"Blender" mode? Right mouse click on your work space opens "Navigation style>", choose "Blender". Now, if you "click and hold scroll wheel" on the mouse, you rotate the workspace around the point you clicked (kind of) with moving a mouse on the pad. Leave the scroll wheel when you found desired vie...
- Mar 08, 2018 11:17 am
- Forum: E-Bike General Discussion
- Topic: The ebike parts designing thread with CAD/CAM
- Replies: 117
- Views: 4787
Re: The ebike parts designing thread with CAD/CAM
One of my main problems with FreeCAD is as far as I can determine the UI is limited to viewing from one side of the virtual box --- no oblique views other than the built in isometric. Adequate for a lot of uses but I am spoiled by having spent so much time on systems that do not have that limitatio...
- Mar 06, 2018 9:56 am
- Forum: General Discussion
- Topic: World Domination, I just got my self a 3d Printer!!!
- Replies: 627
- Views: 49917
Re: World Domination, I just got my self a 3d Printer!!!
Anet A8 kit USD170. 220x220x240
- Mar 04, 2018 9:35 pm
- Forum: E-Bike General Discussion
- Topic: The ebike parts designing thread with CAD/CAM
- Replies: 117
- Views: 4787
Re: The ebike parts designing thread with CAD/CAM
FreeCAD +1. Future is open-source!
P.S. I was not able to open free Fussion360 account in my region.
P.S. I was not able to open free Fussion360 account in my region.
- Mar 01, 2018 12:21 pm
- Forum: E-Bike General Discussion
- Topic: The ebike parts designing thread with CAD/CAM
- Replies: 117
- Views: 4787
Re: The ebike parts designing thread with CAD/CAM
or make it .png to ad alpha channel (for transparency) import to 3D or 2D designer of your preference and draw parametricall sketch over it.
- Feb 28, 2018 3:27 pm
- Forum: Items for Sale - New
- Topic: DIY assembly kit for 18650 without spot welding/Soldering
- Replies: 458
- Views: 36815
Re: DIY assembly kit for 18650 without spot welding/Soldering
I see, a big list of good news. Can't wait to get my hands on V2 batch. Keep up the good work!