Search found 47 matches

by sylvain_wm
Apr 03 2021 1:20pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi, I'm a bit lost... the max speed I get with the BluOSEC app or in diagnostics mode is 66km/h and the max speed is 37km/h with the KT-LCD3... as if the display interferes with the controller. I spent days trying to find a solution but I didn't find anything... Does anyone have an idea? Have a good...
by sylvain_wm
Mar 29 2021 10:55am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

What is the speed when unloaded (ie wheel in the air)? I draw about 15A to remain at 38kph on flat so maybe your current limit is too low Hi, the speed when unloaded is the same (35km/h). When I reach 35km/h the current decreases and I have no power anymore. The max current doesn't change anything.
by sylvain_wm
Mar 28 2021 12:08pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi, I have a problem with my fatbike. The max speed I got with a 48V battery was 35km/h. I decided to get a 72V controller with a 72V battery to increase the max speed, but it doesn't work at all. The max speed remains at 35km/h. Does anyone have an idea? Here is my config.h config.h Another problem...
by sylvain_wm
Feb 27 2021 6:25am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

stancecoke wrote:
Feb 27 2021 5:13am
Have you read the wiki??? Or do you think, asking stancecoke is much easier than reading all the stuff?
I have read it for a long time and I don't want to bother you stancecoke.

Thanks a lot.
by sylvain_wm
Feb 27 2021 4:38am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Thank you stancecoke for your patience... and for sharing your experience. but it expects a duty cycle of the PAS signal different from 0.5 by default. I can't change the duty cycle of the PAS signal. Do I have to create an additional circuit? One guy in the german forum wasted three sensors this wa...
by sylvain_wm
Feb 26 2021 1:22pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi,
how to activate this driving mode? PAS sensor with torque simulation and reverse step detection
In this mode, I just need a PAS. No Torque sensor, no Thumb Throttle. Am I wrong?
What are the most important parameters in this mode?

Regards
by sylvain_wm
Feb 26 2021 9:54am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi, is there a way to use the firmware without a throttle and without a torque sensor? My torque sensor is the problem of my system. The PAS works well but the torque sensor signal is dead. I don't want to use a thumb throttle. I'd like to know if it's possible to use my bike without a thumb throttl...
by sylvain_wm
Feb 24 2021 10:36am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

atkforever wrote:
Feb 23 2021 5:29pm
My battery is limited to 50A
I got it.
You can limit you battery current to 50 amps, it's no matter for the 18fet KT.
Each mosfet supports 150 amps and there are 3 mosfets in parallel.
But it could be damaging to your motor.

Regards
by sylvain_wm
Feb 24 2021 9:55am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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 sylvain_wm
Feb 24 2021 8:46am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi, My battery is limited to 50A so I though that 120A would be an OK value. I don't know what kind of motor you have, but 20 amps in a motor winding is already a lot. If your motor is a 1000W, a 16S battery provides 60V power = voltage times current => current = power / voltage = 1000/60 = 16.7A I ...
by sylvain_wm
Feb 22 2021 12:29am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hi,
sdobbie wrote:
Feb 21 2021 6:09pm
it won't compile
I had the same issue : ui32_SPEED_km_h and ui8_control_state don't exist.

Have a good day.
by sylvain_wm
Feb 21 2021 4:25am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Have you did this for different currents? Yes I did. I think I was pretty accurate. For the phase current you have to use the same formula as for the battery current. Ok. I thought the firmware used the current sensor because the value is read in the program. It's only used for the zero crossing. T...
by sylvain_wm
Feb 20 2021 1:18pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Thanks stancecoke, I measured currents and printed out their adc values. For ui16_BatteryCurrent I obtain the equation: ui16_BatteryCurrent = 2.68 x I_batt + 315 For ui16_adc_read_phase_B_current I obtain the equation: ui16_adc_read_phase_B_current = 2 x I_phase_B + 511 I'd like to limit the battery...
by sylvain_wm
Feb 20 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: 4469
Views: 440743

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

Hello, in diagnostic mode, when I print out ui16_control_state, ui16_BatteryCurrent, ui16_current_cal_b I get : 28 316 315 without pedalling, weird??? when I pedal and brake, only ui16_BatteryCurrent increases. Is that normal? It doesn't seem correct. To tell the truth, I'm a bit lost... I don't hav...
by sylvain_wm
Feb 19 2021 1:33pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

Hello,
I still have problems :
- When I stop pedaling, the motor takes time to stop... too much time. Can we change this?
- I'd like to limit the motor current to 20 amps, how can I be sure it's 20 amps?

Does anyone know how to solve these problems?

Have a good day.
by sylvain_wm
Feb 19 2021 3:46am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

My board is dead!!
While measuring VGS, I made a shortcut!!
3 MOSFETs are dead.It's not that bad.
I have now an arm with only two transistors instead of six.
I'll send you scopes later.
by sylvain_wm
Feb 19 2021 3:01am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

The FET circuit is designed to operate with 15V. 12V is a little low and might not be optimal for the FET's. The MOSFET for this board is an IRFB4110 (instead of a TK150E09NE for KT 48V) You are right, the output voltage of the second LM317 is Vout=15V. But the Gate Threshold Voltage of the MOSFET ...
by sylvain_wm
Feb 18 2021 1:33pm
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

The bluetooth communication is now perfect. I got rid of the two LM317s and the two resistors. I used instead a DC/DC converter 90V/12V. LM317 to DC_DC converter.jpg It doesn't heat up anymore. And the system is stable. I can now study the behavior of my bike with the bluetooth diagnostic. Everythin...
by sylvain_wm
Feb 18 2021 10:04am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

have you checked the stability of the 5V rail? We had often problems with unexpected controller behaviour, when the current on the 5V rail was to high and the voltage dropped. I think you're right, there must be a problem with the 5V. I tried to supply my controller with another power supply, the b...
by sylvain_wm
Feb 18 2021 9:54am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

I unsoldered a wire that I assumed was the input to the SPEED sensor and soldered it to the pin X5 of my KT controller and now the speed is read on pin 30 of the microcontroller. The speed is displayed on my KT LCD3 ... Small steps .... Now the motor spins !!! Always ... and the speed is 62km/h I ha...
by sylvain_wm
Feb 18 2021 8:50am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

stancecoke wrote:
Feb 18 2021 6:36am
so you can calculate throttle min and max approximatly:
0.8*255/5 = 41
2.9*255/5 = 147
I don't know why, but the throttle is reading now and I have 37 min and 180 max....
by sylvain_wm
Feb 18 2021 7:37am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

atkforever wrote:
Feb 18 2021 7:29am
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.
I tried but t doesn't change anything.
Thanks
by sylvain_wm
Feb 18 2021 7:12am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 4469
Views: 440743

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

stancecoke wrote:
Feb 18 2021 6:36am
can you post your recent config.h as a textfile, please!
Here you are :
config.txt
(1.4 KiB) Downloaded 11 times
I'm starting to wonder if the problem isn't the controller itself ... maybe?
The resistors that heat up a lot (200°C!!) that's weird... the ADC that doesn't work...
I'll try to check the PCB.
Thanks