Search found 578 matches

by Vanarian
Feb 17, 2018 7:07 pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 3.2KW / 6KW inline skates (updated June 16th 2017)
Replies: 191
Views: 21707

Re: 3.2KW / 6KW inline skates (updated June 16th 2017)

https://www.youtube.com/watch?v=6m_iIbX0gmA i see the future in this type of motors (axial flux with permanent magnets). It is very easy to cool the coils becouse they are on each side of the rotor and not moving. Even some cryogenic cooling is possible in future. This can boost engine peak power t...
by Vanarian
Feb 08, 2018 8:40 pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 3.2KW / 6KW inline skates (updated June 16th 2017)
Replies: 191
Views: 21707

Re: 3.2KW / 6KW inline skates (updated June 16th 2017)

Hi! nice job man! im also developing engine for inline skates. I hope i will have working prototype assambled in next week. It is special kind of motor.. wheel is part of motor. Stator is mounted on the chassis. Setup is very light.. we will see about power and efficiency. I managed to mount powerf...
by Vanarian
Nov 23, 2017 3:01 pm
Forum: Forum Rules and Features
Topic: Let's get your feedback - upgrading the system to phpbb3.2.x
Replies: 22
Views: 6138

Re: Let's get your feedback - upgrading the system to phpbb3.2.x

Well my own theme never was standard on screen when browsing E-S (I got it all blackened out with only white and soft blue letters to make it more comfortable to read).

I noticed a bug : when posting while already connected, I have to reconnect anyway. Apart from that I like the new look !
by Vanarian
Oct 09, 2017 3:26 pm
Forum: Motor Technology
Topic: How to isolate (posibly shorted) stator lams?
Replies: 10
Views: 650

Re: How to isolate (posibly shorted) stator lams?

Here is what I mean along with my poor micro photography intent. :D See produced by sand granule grooves and fold over metal to neighbouring lams, ripped out chunks folded over and pressed in between lams. Should I also cut a stator apart to see how lams are pressed on the assembly cage? If any int...
by Vanarian
Sep 25, 2017 7:48 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Qiewa, SAY YEAH, or something else?
Replies: 1
Views: 315

Re: Qiewa, SAY YEAH, or something else?

Hi why not make your own based on a dirt scooter and electric bike parts? 1300$ is a steep budget which allows a quality build.
by Vanarian
Sep 09, 2017 4:23 pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Meepo Board
Replies: 4
Views: 754

Re: Meepo Board

https://cdn.shopify.com/s/files/1/2096/3333/products/IMG_20170719_094756R_530x@2x.jpg?v=1500520224 I'm not sure due to picture resolution but it looks like it is based on VESC with hardware mods (stm34 chip?) . It is possible that he's running a custom VESC firmware too. Would explain why he told t...
by Vanarian
Jul 29, 2017 4:12 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1073

Re: Titanium foldable e-scooter TROLLI

Ok thank you for all the infos ;) that's some serious torque you got there! 30km/h with climbing and good range is also big plus, not many people will go past this speed. VESC is really great, that's what I'm using too (somewhat custom version and intend to go further custom). Main advantages would ...
by Vanarian
Jul 27, 2017 8:41 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1073

Re: Titanium foldable e-scooter TROLLI

Also, question question for Vanarian, what are the other popular e-skate communities these days? Hi :) mainly I see Reddit and electric skateboard builders, e-sk8.fr and .de are also working fairly active and regular with many core members. I have hard time using reddit because of the format, though.
by Vanarian
Jul 27, 2017 4:03 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Titanium foldable e-scooter TROLLI
Replies: 11
Views: 1073

Re: Titanium foldable e-scooter TROLLI

Hi, from your description and the pictures I see that a huge amount of love and work has been poured into your scooter. Big kudos for that. Now you may have a similar problem than me : your communication is not great! No offense here, let me explain :wink: I come here daily and it took me a month be...
by Vanarian
Jul 25, 2017 10:08 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Buy E-skateboard OR make DIY e-skateboard?
Replies: 2
Views: 748

Re: Buy E-skateboard OR make DIY e-skateboard?

You've come to ES. You've already took a first step toward building your board ;)

Make a little effort, it is super easy nowadays to make a custom powerful and reliable board. Nothing like few years ago.
by Vanarian
Jul 24, 2017 4:24 am
Forum: Battery Technology
Topic: DIY nickel-plating onto copper cell connections
Replies: 29
Views: 2009

Re: DIY nickel-plating onto copper cell connections

Stupid question from stupid me :P Why not plasti-dip the whole connections with spray after battery is assembled? It solves the copper corrosion problem and adds better protection against wet. Should also be easier right? Edit : to ensure not to make a mess you can also stick filter to only spray on...
by Vanarian
Jun 27, 2017 8:57 am
Forum: Motor Technology
Topic: VESC-controller
Replies: 104
Views: 11343

Re: VESC-controller

Your board size 160x90 mm is kind of big. Too big for an ebike IMHO. I like VESC-X size. The case is 64x64x22mm. Perfect fit with 18650 cells. This isn't for ebikes. Buy a VESC-X I did, but it would be nice to buy controller that can handle more power. VESC-X can only go up to 60A and 10S (recommen...
by Vanarian
Jun 24, 2017 7:20 am
Forum: Battery Technology
Topic: The most powerful 18650
Replies: 26
Views: 1740

Re: The most powerful 18650

LG HB series no contest as far as continuous high amp and low temperature go. (under 80 degrees) 30A without problems. Highly underrated here because of low capacity. For above 90 degrees Sony VTC5A higher voltage and same discharge capacity. For bigger size, Samsung 21700-30T as said above. Super d...
by Vanarian
Jun 14, 2017 5:06 pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Grin's weight sensing electric longboards #4 and 5, and kit!
Replies: 15
Views: 1384

Re: Grin's weight sensing electric longboards #4 and 5, and

Hi Justin huge job done here ! Are the strain gauges responsive enough ? Keep going! :D
by Vanarian
Jun 13, 2017 5:08 am
Forum: Battery Technology
Topic: Cheapest Active Cell Balancer Project
Replies: 20
Views: 1664

Re: Cheapest Active Cell Balancer Project

Cheer up ! I'm a bit mad after my postal country services, was really looking forward to give you feedback too.

In any case that's a great share and as soon as I can I'll make test units for review ; hope more people here will adopt it :) I'll forward your link to the french DIYer community too.
by Vanarian
Jun 05, 2017 8:06 am
Forum: Motor Technology
Topic: Hubsink + Ferrotec + protective paint + black paint = WOW
Replies: 23
Views: 1995

Re: Hubsink + Ferrotec + protective paint + black paint = WO

Much take off! Such torque ! So wow! :shock: Very skilled rider too to keep the rear wheel from sliding !
by Vanarian
May 24, 2017 9:16 am
Forum: Battery Technology
Topic: Solderless 18650 pack - looking for feedback
Replies: 7
Views: 1038

Re: Solderless 18650 pack - looking for feedback

http://i.imgur.com/hg989UD.jpg Hi Synon, I'm very interested in your fasteners ! Do you have a link to get them? What is the size ? 3.5x100mm ? 3x100? BTW about battery holders, I'm going to post my grain of salt soon :wink: After I test them above 30A discharge per cell I'll post here. Should inte...
by Vanarian
May 22, 2017 2:00 pm
Forum: Motor Technology
Topic: Self balancing with Turnigy 80-100 motor
Replies: 7
Views: 1011

Re: Self balancing with Turnigy 80-100 motor

Image
Well done :mrgreen: How about spending some time to learn about VESC?
by Vanarian
May 19, 2017 9:50 am
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 328
Views: 43225

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

That's some nice aluminum work there ! :D
by Vanarian
May 16, 2017 12:37 pm
Forum: Motor Technology
Topic: ESC thermal management and thermal resistance
Replies: 2
Views: 208

Re: ESC thermal management and thermal resistance

Now that's some info ! Gonna take my time, thank you :D I'll be back
by Vanarian
May 16, 2017 5:45 am
Forum: Motor Technology
Topic: ESC thermal management and thermal resistance
Replies: 2
Views: 208

ESC thermal management and thermal resistance

Hi, Better ask than fry components :D Could somebody explains how thermal resistance works ? I'm currently looking for ways to dissipate heat through passive conductors from my VESC FETs. I was thinking of putting caloducs to use with an alu heatsink or plate. FETs are on a separate board so cooling...
by Vanarian
May 11, 2017 2:21 pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 47
Views: 4515

Re: Fuse-wire for individual cells, DIY Tesla style

Hey I've been trying to figure a proper size to try this and came with an issue : what about added resistance of the fuse wire compared to a "normal sized" one? That's potential lot of voltage drop to account for.
by Vanarian
May 05, 2017 4:25 am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 47
Views: 4515

Re: Fuse-wire for individual cells, DIY Tesla style

Ok thank you guys, and thanks for the link! Should try a lower size to experiment the fuse at high amps. Just to see how it breaks. On YouTube I saw a comment from a guy speaking about thermo-relay fuse, what is that? I mean what is the difference between a properly sized "cable" and this? Another q...
by Vanarian
May 04, 2017 5:08 am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 47
Views: 4515

Re: Fuse-wire for individual cells, DIY Tesla style

After looking different DIY fuses packs, I came to realize that this is only suited for low discharge cells for big parallel packs. At the levels I want to discharge mines (30A continuous to 60A seconds of bursts per cell), are there any fuses with compact sizes able to stress 60A without breaking? ...
by Vanarian
May 03, 2017 8:39 am
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 47
Views: 4515

Re: Fuse-wire for individual cells, DIY Tesla style

Very interesting, thanks ! How does the "fuse" works here, does it prevent total failure by shutting down only the shorted parallel group ? Never thought of this :D