Search found 205 matches

by nuxland
Jan 16 2021 6:13am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Made myself a wheeled table to configure motor and controller in the livingroom. Can't took the whole kart there :) So now the second controller should be also configured to that motor. Had to change configuration laptop time to year 2017, because sevcon license is only for a year (I do not understa...
by nuxland
Jan 12 2021 12:11pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

In Estonia there is no 250cc shifters (they use these in big tracks in other countries and their top speed is over 200km/h). But we have 125cc three versions 1. without gears (rotax max) 2. with 2 gears (rotax dd2) 3. 6 gears (KZ2). Also ProKart events there are also old soviet karts both 125cc, 1. ...
by nuxland
Jan 08 2021 3:19pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Finally could move to garage and finish up all the wires in the new frame. As this so called "turbo" button on the wheel (that actually activated profile 2) was very hard to use in races (you have to look and then keep it pressed). Then now I installed 2pcs of tumbler switched instead ON-O...
by nuxland
Jan 02 2021 9:13am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Wanted to test what is the max I can use with kWeld. So shortened my welding cables to 40cm each and input cables are 15cm each but 6AWG so together should be 1m total lenght. Had to lower voltage to 11,8V to be able to calibrate to 1971A (12,0V gave me overcurrent). kweld_CAL_1971A.jpg And then tes...
by nuxland
Jan 01 2021 6:58am
Forum: Battery Technology
Topic: 36V (3x12V) Pb battery replacement
Replies: 1
Views: 401

Re: 36V (3x12V) Pb battery replacement

Made another one and now have two of these.
by nuxland
Dec 28 2020 2:27pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Shortened the wires and got 1700A CAL current with 12V.
Also told to the system that I have now 1,2m cables so overcurrent max should be 1800A in system now.
Resistance was also a little bit lower, at 2,48 mR
by nuxland
Dec 28 2020 12:34pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Got my kWeld and with 11V got these CAL numbers: 2,5mohmi and 1263A Output cables are both 50cm so together 1m and intput cables are 45cm each, so together 90cm (but these are 6AWG). So I entered 1,5m in cable lenght, because 90cm of 6AWG should be ~50cm 8AWG :) But it seems I need to shorten these ...
by nuxland
Dec 23 2020 12:55pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Finished my capacitor pack enclosure and added awg10 with xt90 for charging and awg6 with QS8S connector (its larger than xt150) for discharging. If awg6 is to large then I can change it to awg8 and xt150 connectors (will be making that output wire also). Also printing out bottom enclosure with my a...
by nuxland
Dec 17 2020 4:43pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Hey I have a question about power source. Made myself a 12v power source from 6pcs of 3000F 2,7v ultracaps. And somehow blowed off my malectrics v2.2 spot welder with 9ms pulse (two mosfets died) So my question is, can kweld handle that or I need less powerfull powersource? Hello. Someone can proba...
by nuxland
Dec 17 2020 2:04pm
Forum: Battery Technology
Topic: Cylinderical LiFePO4 cells?
Replies: 22
Views: 780

Re: Cylinderical LiFePO4 cells?

I made a 34s10p pack out of these A123 cells and can get over 600A out. And in a kart track my pack last about 10km (using 2kwh) of heavy acceleration and braking (i'm not using regen). https://endless-sphere.com/forums/viewtopic.php?f=14&t=85912 Yes they are heavy (about 37kg is my pack and has...
by nuxland
Dec 15 2020 1:56pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1220
Views: 181822

Re: kWeld - "Next level" DIY battery spot welder

Hey

I have a question about power source. Made myself a 12v power source from 6pcs of 3000F 2,7v ultracaps.
And somehow blowed off my malectrics v2.2 spot welder with 9ms pulse (two mosfets died)
So my question is, can kweld handle that or I need less powerfull powersource?
by nuxland
Nov 21 2020 6:21am
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 52
Views: 3541

Re: EKartGo Project

Pouch AMP20M1HD-A C-rate and max amps are not right in your table :)
Due of that also my 4kwh battery specs are wrong in your excel.
As I know AMP20M1HD-A has 15C or 300A.
by nuxland
Nov 16 2020 5:52am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Weighted new controller parts, new is 6,51kg lighter and that with contactor. ControllerBaseWeight.jpg Old watercooled with big heatsink and without contactor WaterCooledOldControllerWeight.jpg Also installed accelerator unit and cable Accelerator.jpg It's 3 degrees celcius outside, so can not work ...
by nuxland
Nov 12 2020 12:21pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

have you ever thought about using water spray? I tried on outrunner it works well. they were outdoor misters for the terraces. When I had closed motor with oil inside, I thought to cool with compressed nitrogen (these little bottles that airguns are using) and to spray it through some misters to mo...
by nuxland
Nov 09 2020 6:01am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Finally completed new motor cooling sideplate. Comparision to my old one, the new one is like 1,17kg heavier :twisted: MotorCooling.jpg In initial test with cardboard box and hole inside in front of the opening old fans where able to push 20m/s wind through hole and new ones 23m/s. So not so big imp...
by nuxland
Nov 02 2020 12:06pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Left SidePod holder and battery baseplate holder is now finished and compared to my old tony frame the new is 520g lighter :) OldvsNewSidePod.jpg Made my battery baseplate also 580g lighter :) OldvsNewBatteryBasePlate.jpg So together I was able to make left side about 1100g ligther compared to my ol...
by nuxland
Oct 28 2020 12:49pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

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. I had to buy 6m lenght tube and I only used like a 1m from that :roll: Finished welding and aluminium is lighter than original. LeftSidePodAluminium.jpg...
by nuxland
Oct 27 2020 5:15am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Measured and from rear shaft center to rear sidepod center is 22 cm And space betweeen sidepod centers is 50cm like in the photo. Meanwhile cut correct length from aluminium tubing (outside 30cm and inside 24cm) made inside to 25cm for required lenght. Also cut another tube between them and also new...
by nuxland
Oct 15 2020 3:01pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

In this new Energy frame the distance is the same as my old tony frame. Will measure it tomorrow :)
by nuxland
Oct 15 2020 11:12am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Out with the old IMG_7200.jpg And in with the new FromTop.jpg Also started to make room for battery base and cut away parts that are on the way :) If battery side is completed then next thing to do is controller placement in front of the motor. BTW I will install motor sprocket to driver side this t...
by nuxland
Oct 13 2020 12:59pm
Forum: Large EV General Discussion
Topic: EKartGo Project
Replies: 52
Views: 3541

Re: EKartGo Project

Laser cutting for bus bars is EXPENSIVE. $185 + tax for 42 pieces, using my own copper sheet. Yes it is expensive :) I paid 224€ for copper busbars water cutting from my own material when I build my smaller lifepo4 battery. busbars.jpg And on top of it also 60€ for laser cutting plexi glass parts t...
by nuxland
Oct 07 2020 11:56am
Forum: Items Wanted
Topic: WTB Zero 75-5 encoder
Replies: 1
Views: 245

Re: WTB Zero 75-5 encoder

I do not know what type zero has. But i installed this sin/cos to my revolt motor.
And it worked just fine with sevcon.
https://www.rls.si/eng/rmb29-rotary-magnetic-module
by nuxland
Oct 01 2020 11:31pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

101C motor temperature shown. No issues with it getting that hot? I have it configured that from 113 it will start to slowly cutback until 130 where power will be almoust zero :) I have air push trough so magnet temperature should be lower as temperature is measured from windings and there is airga...
by nuxland
Oct 01 2020 12:50pm
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

That looks bad, but is it really damaged except for the rear axle? It dosent really matter I guess, if you wanted another chassis anyway. Front left spindle got damaged also. But it did not matter as I wanted to move to a new frame anyhow :) As for the frame, it was old and I want to get better lap...
by nuxland
Sep 30 2020 7:05am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 187
Views: 44193

Re: Electric kart

Have already long time thinking of changing my kart frame to a better one. My current frame is from the year 2014 and was then bought used (I was rookie then and it was worn already from bottom). So now this happened: BentRearShaft.jpg Was my own fault and I do not know what I was thinking to get th...