Search found 36 matches

by atkforever
Mar 04 2021 8:57am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Did you buy ACS758 ? i'm pretty sure they are too big for your board. https://scontent-cdg2-1.xx.fbcdn.net/v/t1.15752-9/156463408_1342554006100553_5128328901037888677_n.jpg?_nc_cat=102&ccb=3&_nc_sid=ae9488&_nc_ohc=KQ_bNVfZLsgAX_EulVN&_nc_ht=scontent-cdg2-1.xx&oh=45a1758ed7dbc5095...
by atkforever
Mar 04 2021 6:52am
Forum: Motor Technology
Topic: What controller for 72v, 100+ amps?
Replies: 12
Views: 468

Re: What controller for 72v, 100+ amps?

Have you checked Sabvoton controllers ? There are some model that could fit.
by atkforever
Mar 04 2021 4:02am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Yes it is surely overkill for your board, check ACS711 or ACS712, you cand find them on amazon (mounted on a board, just unsolder it) or ebay, aliexpress... https://lh3.googleusercontent.com/proxy/RBVebabuBW3oLKTtjkTQqh5jpxT0fETuDuNk9ErYmXn-q7okNm-re6BvEfjUXHvEQ3vxz8i5yWXNWmR_z2rc_2BUtEJ2_lrvuFQ96nI...
by atkforever
Mar 03 2021 3:43pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

thanks is it possible to attach a current sensor or am i SoL The footprint on the PCB looks like it could fit an ACS72981 . You can check the dimension on your PCB. And you have to check, if there is a solder bridge somewhere that shortens the two sensing pads. This has to be removed of course. reg...
by atkforever
Feb 27 2021 6:30am
Forum: General Discussion
Topic: Daly BMS question
Replies: 8
Views: 235

Re: Daly BMS question

I own several daly BMS and I can say they are good. Amp ratings are correct and temp cuttoff works as expected. I think the problem comes from amazon, mines came with a box and a manual (i've ordered them on Aliexpress though). One BMS has fried after 1 year of strong usage and the seller sent a rep...
by atkforever
Feb 24 2021 10:17am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

My motor is a MXUS 3K rated at 3000W nominal (90N.M torque and 800RPM at 60V) There are something wrong with your table : speed = radius times angular velocity ( speed in m/s radius in meter and angular velocity in rad/s) With your values : 26 inch wheel : speed = 27.4 m/s = 98 km/h !!! Mechanical ...
by atkforever
Feb 23 2021 5:29pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Hi guys, what max phase motor current can I configure? I have a 18fet KT (stock hardware, didn't mod the fets or caps), running at 16S. My battery is limited to 50A so I though that 120A would be an OK value. is there any risk to burn the fets ? What is the absolute max phase amp in stock configurat...
by atkforever
Feb 22 2021 4:34am
Forum: Battery Technology
Topic: Any advice about my pack design
Replies: 8
Views: 330

Re: Any advice about my pack design

This arrangement allows for three series connections between P10-P16. What about just three series connections (1S,3S,5S) between P1-P9 instead of all five. Thank you so much. Regarding the series connections you are right; since i'm using 0.15 pure nickel I'll allow 7amp max through one strip. In ...
by atkforever
Feb 18 2021 6:58pm
Forum: EBike General Discussion
Topic: 3kw eBike Build Questions
Replies: 26
Views: 1149

Re: 3kw eBike Build Questions

What are those cell holders? Sent from my Nexus 6 using Tapatalk These are custom made. I call them gatling gun style. 10S in this case. They can be any S and I might make 4P sometimes in the future just for fun. Battery 1.jpg No offence but that pack design is stupid, the cells located near the co...
by atkforever
Feb 18 2021 4:52pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

I own exactly the same controller except the fact it's labeled KT56-90..., hardware is the same, I havn't tested it yet as my new motor is still between China and France. I'll use 16S battery so I might have the same issue as you. You said you solved it by replacing the line with DC/DC 90V-12V conve...
by atkforever
Feb 18 2021 4:31pm
Forum: Battery Technology
Topic: Any advice about my pack design
Replies: 8
Views: 330

Re: Any advice about my pack design

So, its aok to spot-weld a longer strip between those two white (p-15) cells. With several bus bar spot-welds on can end of that p-15 cell it's better to spot-weld in two or three places closer to side of can than all on or near center. Some believe that it's always better to spot-weld off-center o...
by atkforever
Feb 18 2021 8:04am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

s-lcd3 v3,0 72v ( works down to 50v with all my 36,48v controllers) now I am back with another kt-lcd3 v3.0 0.6F 24-48v and another controller but it has the same board... maybe I will try the 12fet now. its the bmsbattery 40A same as yours. edit: no brake icon, as i mentioned before. empty battery...
by atkforever
Feb 18 2021 7:29am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Your voltage calibration is still set to 90? I guess u should use a value around 150 or even more for this kind of controller.
by atkforever
Feb 18 2021 4:16am
Forum: Battery Technology
Topic: Any advice about my pack design
Replies: 8
Views: 330

Re: Any advice about my pack design

Yes sorry, about to spot weld.
by atkforever
Feb 18 2021 3:19am
Forum: Battery Technology
Topic: Any advice about my pack design
Replies: 8
Views: 330

Re: Any advice about my pack design

I am about to solder everything soon so if I'm doing crazy mistake please tell me :D
by atkforever
Feb 17 2021 10:28am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Did you try to adjust the "Motor spec angle" parameter? start from 0 and increase by 5.

An other thing, you say battery your battery is at 81V, 235 as overvoltage value seems a bit low to me, try 240 for instance.
by atkforever
Feb 17 2021 8:43am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Hi, I can flash it. The LCD display works but : - the speed remains at zero while I pedal. - the battery indicator remains empty while the voltage display by the LCD is 81V. I checked the speed signal, the torque and PAS signal... The hall sensors work well... Here is the screenshot of my OSEC conf...
by atkforever
Feb 17 2021 8:19am
Forum: Battery Technology
Topic: Any advice about my pack design
Replies: 8
Views: 330

Any advice about my pack design

Hello Guys, I am designing my 3rd LI-ION pack and this time i'm unsing an Hailong like DIY kit (91cells). My pack is 16S5P, and max amp will be limited to 40A. I red line is the nickel strip for the serie connection of the last 2 groups, and green line nickel strip of the parallel connection of cell...
by atkforever
Feb 17 2021 3:44am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Hello Sylvain,

Can you give more details about what isn't working? Can you flash it properly?

Maybe your undervoltage limit is too low or If you use no display there are 2 wires on the display socket to short : red and blue.
by atkforever
Feb 03 2021 6:42am
Forum: Motor Technology
Topic: VESC capable of 17S
Replies: 1
Views: 181

VESC capable of 17S

Hello, I've found an interesting VESC based board on Ali, it's capable of 17S and 50A (and relatively cheap). Max voltage has always been a problem with 50-100$ish VESC hdw such as 4.12 board, since it's 13S absolute max (many ppl report they fried it even at 12S). https://fr.aliexpress.com/item/100...
by atkforever
Jan 29 2021 5:36am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

ZW cannot be turned to Sinewave by Software. Is there a way to mod the controller in order to activate interpolation? you can use sinusoidal commutation, if you have Motorhallsensors. You can't use the "simplified" FOC. To use it, you have to solder the ACS phase current sensor to the PCB...
by atkforever
Jan 29 2021 4:57am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

After carefully read the Wiki, ZW cannot be turned to Sinewave by Software. Is there a way to mod the controller in order to activate interpolation?

Second question : Is there a way to dump the original FW of the controller, the "factory" firmware. I have a STLINK.

Thanks
by atkforever
Jan 27 2021 7:21am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4391
Views: 429100

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

Hello, I plan to buy a KT 60V 60A but the label on the controller says "KT60ZWSRK....". From my understanding ZW stands for square wave. If I upload a new FW with the tool, will it run sine wave simplified FOC? An other question : is it possible to run at 64v (16s battery) without any mods...