Search found 133 matches

by hallkbrdz
Nov 17 2020 8:06am
Forum: Motor Technology
Topic: feedback pls on Motenergy ME1616
Replies: 5
Views: 418

Re: feedback pls on Motenergy ME1616

This may help you decide, or at least show other options available. See links below video for the spreadsheet:

https://youtu.be/xKfQeJxk5RA
by hallkbrdz
Nov 16 2020 2:09pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Episode 2: EKartGo Spreadsheet

This episode shows how to make use of the EKartGo Spreadsheet. Includes selecting a battery runtime, motor choice, and a controller choice to provide resulting battery solutions.

[youtube]xKfQeJxk5RA[/youtube]
by hallkbrdz
Nov 13 2020 9:13am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Nice heatsink/mount design, and now with quattro ventole cooling for the motor. :thumb:
by hallkbrdz
Nov 12 2020 8:08am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Planned episodes: EP01: Intro - Done! EP02: A Salt and Battery EP03: BusBar Mania EP04: Avoiding Wiring Spagetti EP05: It's all about the BMS EP06: Charge! EP07: Merry Christmas EP08: Batteries Included EP09: Ground Control to Major Tom EP10: Velocity Control and Cleanup EP11: First Spin! EP12: Up i...
by hallkbrdz
Nov 12 2020 6:49am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Introduction video for my project. More to come!

[youtube]zGnPLBW8xb0[/youtube]
by hallkbrdz
Nov 05 2020 3:41pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Requested information and testing for the Peregrine 60 144v motor. Nix the heavy under-powered Motenergy motor series, I'll wait and make 2021 fun with this instead.
by hallkbrdz
Nov 05 2020 12:26pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

WooHoo... Signed up for more details!
DHX_Peregrine_Tweet.png
DHX_Peregrine_Tweet.png (37.45 KiB) Viewed 822 times
by hallkbrdz
Oct 27 2020 1:05pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Battery base and holder are complete, other than cutting out the upper right corner. Ice storm today, so that will have to wait a day or two. IMG_20201027_121548sm.jpg Now to get the nickel strips attached to the copper. Not going as easily as hoped. I'm going to try baking them together instead of ...
by hallkbrdz
Oct 27 2020 12:59pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Hillhater - Thanks, looks like my battery support will bolt to mostly any frame then. :thumb:

Nuxland - Nice! I would have like to have made the support all aluminum, but metric tube supply here is - difficult. Oh well, maybe the next time.
by hallkbrdz
Oct 26 2020 1:09pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Did you get a chance to measure it? Just curious, no rush.
by hallkbrdz
Oct 22 2020 3:58pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Just picked up the parts - look good. I think the scaling between mm and decimal inches was a hair off, but nothing that it going to cause a problem. Now to get the MOT solder station completed, soldered, and then fire up the KWeld to attach them to the cells.
cut_buss_bars.jpg
cut_buss_bars.jpg (318.37 KiB) Viewed 883 times
by hallkbrdz
Oct 15 2020 2:24pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Nice!

Curious - what is the spacing center to center between those sidepod posts? A couple of us are trying to determine if there is common standard for adult carts, or if it is mfr / model specific.
by hallkbrdz
Oct 14 2020 11:50am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Sheet dropped off, parts should get cut either tomorrow or early next week by this monster. Can't wait to get soldering on the nickel and getting this pack completed.

Image
by hallkbrdz
Oct 14 2020 9:55am
Forum: Items Wanted
Topic: WTB: Zero 75-7 IPM motor, US source
Replies: 0
Views: 186

WTB: Zero 75-7 IPM motor, US source

WTB: Zero 75-7 IPM motor (2016+), US source

If you currently have, or will have one in for sale in a couple of months let me know. My build is progressing now and I hope to start testing in Dec/Jan.

Note: IPM only to try and avoid cooling issues at 44C+ track temperatures.
by hallkbrdz
Oct 13 2020 11:32am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Laser cutting for bus bars is EXPENSIVE. $185 + tax for 42 pieces, using my own copper sheet.

Hope there are no errors for that much!
by hallkbrdz
Oct 11 2020 9:19am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Sidepod battery holder welded. bare battery holder.jpg Time for some paint today, and a decision on what to do plastics wise. As the battery comes out to the edge of the the added front-back rail, I can either cut the front to match the back to clear the battery, or find another thinner sidepod plas...
by hallkbrdz
Oct 09 2020 9:50am
Forum: Large EV General Discussion
Topic: Drift E Go Kart
Replies: 1
Views: 849

Re: Drift E Go Kart

I'm not quite sure how to answer what is best for you as I don't fully understand what helps to make the best drift vehicle. My assumptions would be: Rear bias on weight to help throw the back out easily Low weight isn't that important Massive responsive torque is of prime importance Competitions ar...
by hallkbrdz
Oct 08 2020 3:58pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Latest "round" with laser cutting people. Hopefully this revision works better as they said I need at least one hanger per part and more spacing between the parts. I sure hope so - these are really holding me back from getting the battery assembled. And my wife keeps asking me why I have t...
by hallkbrdz
Oct 04 2020 7:00pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

Finished cutting all but the forward battery tab, ready to start welding. I think this will work great (if a bit heavy). Should be plenty strong.
battery_mount_bare.jpg
battery_mount_bare.jpg (386.51 KiB) Viewed 1853 times
Shown with bare battery base. Area scored to the left will be cut out for wheel clearance.
battery_mount_w_plate.jpg
battery_mount_w_plate.jpg (315.78 KiB) Viewed 1853 times
by hallkbrdz
Oct 02 2020 7:21pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 57
Views: 4313

Re: EKartGo Project

I'm working on building the battery box, and came across this. Now the US is getting some really weird size mixtures. :lol: Of course with lumber who knows what the true size is.
oddsize.jpg
oddsize.jpg (76.69 KiB) Viewed 1883 times
by hallkbrdz
Oct 02 2020 10:04am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Ahh, I see. I had assumed that Zero used Neodymium magnets which start to weaken at 80C and that the temperature probe reading would be somewhat close to what the rotor is seeing, especially for a SMPM instead of IPM motor. That has been my max target as far as a motor / cooling system design goes. ...
by hallkbrdz
Oct 01 2020 9:46pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

101C motor temperature shown. No issues with it getting that hot?
by hallkbrdz
Sep 30 2020 7:48am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 45155

Re: Electric kart

Brain lapse, it happens...

Fairly hard hit, glad to see everything else survived. :thumb:
by hallkbrdz
Sep 29 2020 7:24pm
Forum: Large EV General Discussion
Topic: EV helper spreadsheet
Replies: 5
Views: 1060

Re: EV helper spreadsheet

Added my best estimate for the new Tesla 4680 cell based on the slides to the cylindrical tab. Enjoy!

https://drive.google.com/file/d/17zbJZl ... sp=sharing
by hallkbrdz
Sep 25 2020 10:41pm
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 48
Views: 1724

Re: Tesla battery day announcement

At this point everything is a WAG! It's still in development, they don't even know yet what the final specs will be. :wink: