Search found 625 matches

by nieles
Feb 20, 2018 7:41 am
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

The resistor hack works, however you need a power resistor with that can handle quite a bit of heat depending on how much current you want it to take. Accuracy is also degraded due to temperature impacting resistance. It will take almost no voltage drop so kind of any smd near zero Ohm should do th...
by nieles
Feb 20, 2018 7:21 am
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

Almost certain it will be 15A motor phase limit, its rare to see high side DC bus current sense used for controller rating. 36V x 15A = 500 watts, similar to the hoverboard motors, I found those saturate at around 20A. For a 250watt controller 15A can quite easily be the absolute max motor current....
by nieles
Feb 19, 2018 1:49 pm
Forum: E-Bike Technical
Topic: Arduino powered Speedometer
Replies: 5
Views: 229

Re: Arduino powered Speedometer

23 pole pairs is possible (46 poles) 23 poles is not possible, the number of poles should always be divisible by 2 (always a N pole and S pole magnet) the best way would be to temporarily install a spoke magnet, and then count the amount of hall pulses for one spoke magnet pulse. less human error. t...
by nieles
Feb 19, 2018 7:22 am
Forum: Motor Technology
Topic: Revolt motor sensors - bad hall position and wiring
Replies: 13
Views: 738

Re: Revolt motor sensors - bad hall position and wiring

Good to know, Thanks. do you know if the I2C pins (for reprogramming) are accessible on the RCM22?

i am not sure what i will use. the RCM22 (RLS) or the AMT312S (CUI)

the RCM has more options, but the AMT is easy reprogrammable by just unplugging the encoder and connecting it to a UART terminal.
by nieles
Feb 16, 2018 10:38 am
Forum: Motor Technology
Topic: Revolt motor sensors - bad hall position and wiring
Replies: 13
Views: 738

Re: Revolt motor sensors - bad hall position and wiring

i am having a similar problem with my Cyclone 3000W motor. only the hall is triggering three times for one commutation. something like this: _ ________ _ _____| |_| |_| |_______ i think it has something to do with the rotor, and how it's build. will post a picture later. the encoder you used could b...
by nieles
Feb 10, 2018 7:58 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

actually it doesnt matter where the 'clean' word is. my command and your command yield the same outcome. i found an ever better fix: clean: @echo "Cleaning files..." @clean.bat -rm -f *.asm -rm -f *.rel -rm -f *.lk -rm -f *.lst -rm -f *.rst -rm -f *.sym -rm -f *.cdb -rm -f *.map -rm -f *.elf -rm -f ...
by nieles
Feb 10, 2018 7:22 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

hi, about point 1: i narrowed it down to a part of the make file. i put some debug statements in the makefile (the clean part) Makefile (clean part only) ENTF = cmd /C del clean: @echo "Cleaning files..." @clean.bat @echo "dbg1" @$(ENTF) *.asm @echo "dbg2" @$(ENTF) *.rel @$(ENTF) *.lk @$(ENTF) *.lst...
by nieles
Feb 10, 2018 1:05 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

hi guys, finally got my st-link dongle in the mail. so i can start playing with this project. i got my controller reprogrammed and motor sort of running (cuts out a a certain speed) but i got a weird problem. i can't program the controller without doing something "weird" with the java tool. once the...
by nieles
Feb 02, 2018 1:28 pm
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

Not 100% sure what controller I have. I can't find the top cover of the controller housing. It has the phase current sensor and the STM MCU. But looks a bit different than the photos on the bitbucket website. But I am confident I will get it working. Good to know I can up the PWM freq a bit. I will ...
by nieles
Feb 02, 2018 11:47 am
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

no problem.. really eager to play around with this.. just waiting on the stlink V2 dongle to get started.

do have one question. where is the ERPS limit of 520 coming from? is this a hardware/mcu restriction?
by nieles
Feb 02, 2018 11:34 am
Forum: Motor Technology
Topic: Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 1773
Views: 47955

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

there is a bug in your snapshot.
casainho wrote:
Feb 02, 2018 11:28 am
Image
you assign the value of DIVIDENT to DIVISOR for the KI parameter
by nieles
Jan 25, 2018 3:42 am
Forum: E-Bike Technical
Topic: Arduino powered Speedometer
Replies: 5
Views: 229

Re: Arduino powered Speedometer

Yes, what you want is a low pass resistor capacitor filter. Ceramic cap should be good. Cap around 100nF and resistor something like 100 Ohm
by nieles
Jan 25, 2018 2:46 am
Forum: E-Bike Technical
Topic: Arduino powered Speedometer
Replies: 5
Views: 229

Re: Arduino powered Speedometer

do you have a RC filter on the Hall signal, close to your arduino? could be you are picking up noise from the phase wires.
by nieles
Jan 14, 2018 7:03 am
Forum: Motor Technology
Topic: build your very own Lebowski controller !
Replies: 327
Views: 37997

Re: build your very own Lebowski controller !

Hi Progrock, its very dangerous to compare Hex files, because of the way the file is build up. two totally 'different' hex files (when comparing the ascii) can lead to the same binary file. (binary format is the raw byte information) see if you can convert your .hex to .bin and the same for your rea...
by nieles
Nov 11, 2017 8:17 am
Forum: General Discussion
Topic: Forum software upgrade on 11/17/2017 technical issues thread
Replies: 135
Views: 8140

Re: Forum software upgrade happening on 11/16/17

dingoEsride wrote:What is it with putting the month before the day, surely the lesser be first, 16/11/17 makes more sense
all i can think of: 'MERICA

:lol:


actually year month day makes the most sense for me. added benefit, files with that format in the file name are ordered chronically old to new
by nieles
Nov 11, 2017 5:36 am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 299
Views: 25454

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

Could you get the covers injection molded and produced in lots? I'd be happy to pay extra for a cover for my welder as would most of your potential customers (I believe :D ). I general a good idea, but the production volumes aren't yet enough. Manufacturing the required mold tools will cost in the ...
by nieles
Sep 09, 2017 2:39 pm
Forum: E-Bike Technical
Topic: Connector mismatch - emoto -> BMS Battery S06P
Replies: 28
Views: 1393

Re: Connector mismatch - emoto -> BMS Battery S06P

p1 is number of magnets in the motor times reduction ratio
by nieles
Sep 08, 2017 8:57 am
Forum: E-Bike Technical
Topic: Connector mismatch - emoto -> BMS Battery S06P
Replies: 28
Views: 1393

Re: Connector mismatch - emoto -> BMS Battery S06P

does 'conk out' if the throttle is too high? or does it just stop after a few seconds? i have had a similar problem with one of these controllers and a cyclone 3000W motor. in the end i fixed this by playing with the following settings: 'P1 motor characteristic parameter setting mode' and 'C2 Motor ...
by nieles
Sep 02, 2017 11:39 am
Forum: Motor Technology
Topic: Current Sensors How to select a good one or roll your own.
Replies: 55
Views: 3009

Re: Current Sensors How to select a good one or roll your ow

marcos wrote:I didn't consider shielding for this. Do you know about a nice shielded connector? The only properly shielded connectors I used are usb, not quite appropriate for this application
What about shielded ethernet cable/connector?
by nieles
Jun 08, 2017 7:10 am
Forum: Items for Sale - Used
Topic: sold
Replies: 5
Views: 322

Re: [europe] spot welder 99'9% brand new

what mains voltage is it for? also what kind of plug?

interested btw!
by nieles
Dec 30, 2016 10:42 am
Forum: Battery Technology
Topic: Samsung 30Q INR18650-30Q 3000mah 15a cell
Replies: 243
Views: 34103

Re: Samsung 30Q INR18650-30Q 3000mah 15a cell

The new cells are sent lower in order to meet <30% SOC shipping rules as it seems. If your older cells were purchased several months apart that may explain the difference in capacity if tested. Do you think they charge or discharge the cells in the company before shipping? I'm not sure, but i more ...
by nieles
Dec 09, 2016 8:52 am
Forum: Motor Technology
Topic: Motor Design Software
Replies: 7
Views: 467

Re: Motor Design Software

have you seen this?

https://www.emetor.com/
by nieles
Dec 03, 2016 3:41 am
Forum: Motor Technology
Topic: Micro Lebowski Controller - DIY 3kw
Replies: 496
Views: 33098

Re: Micro Lebowski Controller - DIY 3kw

Just FYI infineon has a similar mosfet. IPT015N10N5ATMA. Havnt checked of they are footprint compatible.
by nieles
Jul 04, 2016 4:00 am
Forum: E-Bike Technical
Topic: how to make the CA waterproof (again?)
Replies: 16
Views: 578

Re: how to make the CA waterproof (again?)

don't do it with your finger, you could potentially kill the electronics with static electricity from your body.