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  1. W

    kWeld - "Next level" DIY battery spot welder

    Alright! Thank you for the support!
  2. W

    kWeld - "Next level" DIY battery spot welder

    Diodes are replaced, but how do i fix the blown track? Can somebody draw some lines in this image?
  3. W

    kWeld - "Next level" DIY battery spot welder

    I was able to replace the broken diode and today i did a first weld. I used a different power source.
  4. W

    kWeld - "Next level" DIY battery spot welder

    I was thinking that for every volt above 6.3V that my battery has, it needs to have 1 mOhm of internal resistance to stay in the current range that does not damage the kweld. For 22V-6,3V=15,7V, so 15,7 mOhm. I'm measuring 21mOhm at the kWeld input. Did it break because R is too high?
  5. W

    kWeld - "Next level" DIY battery spot welder

    I had a similar issue like Sztef89. It happend during calibration (step 6). I use a tesla modul as a power source. It was charged to 22,2V when i tried the calibration. Is there a fast fix for this? Can i still use my tesla modul as a power source or is it too powerful? My battery leads are not...
  6. W

    building the BESC - 100V, 400A motor controller [NOT RECOMMENDED]

    Yes, but that pcb was more of test. I mainly used a small hot air gun for soldering near the copper, although if done too often the pcb will take damage. I assembled the whole board by hand. I would not do this again, just not worth the time :roll:
  7. W

    building the BESC - 100V, 400A motor controller [NOT RECOMMENDED]

    Hello owhite! I used a 4x4mm copper rod for my second board. Soldered in pizza oven. There is still some bending of the board, but that can be reduced if the board is screwed down while soldering (did this on the first pcb with 3 copper wires). Regards, julwaech from vesc forum PS: really nice...
  8. W

    Axiom: a 100kW+ motor controller

    Great work! It's really nice to see the continous improvements of this Project! I have two leaf motors sitting around. If you you need testing capacities i would love to get in touch with you. I also have enough batteries to provide a adequate power source up to 550V. Sooner or later i need an...
  9. W

    Arlo1 Inverter build for Emrax 268

    Right now there are no big updates. I made a custom cooling plate for the controller, but it is a bit leaky :roll: . No new tests with the emrax motor at this point. I also made circuit board that will fit inside the controller case. I got two Nissan Leaf Motors and i will build 2-3 more...
  10. W

    Arlo1 Inverter build for Emrax 268

    I took a video of the first test drive i made last week and it matches with your description. There is much more noise coming from the motor compared to the H300 controller i'm normally using. Here is a part of the test drive video: jYnFJeBHMaY I will try different settings with higher pwm...
  11. W

    Arlo1 Inverter build for Emrax 268

    Good news! I tried several changes in settings and what really helped me was to reduce the deadtime. I reduced it from 2000ns to 500ns and now it's running really good (wheels off the ground). I also changed the pwm frequency to 10 kHz but that didn't changed much. I think i will switch it back...
  12. W

    Arlo1 Inverter build for Emrax 268

    Yes, i did that. The polarity is correct and the channels of the pwm output and the current sensor match up. There is one ribbon cable for each phase. Not really much that could go wrong on that part. What is the relation of the current sensor with my desat problem? My understanding was that the...
  13. W

    Arlo1 Inverter build for Emrax 268

    Ok, all the phases are behaving the same way. So it's not like one igbt is causing desat all the time. I checked the gate signals again. With 5%, 50% and 90% dutycycle. 50% dutycycle: 5% dutycycle: 90% dutycycle: I think they look okay. I also checked the fault signal. As soon as i give a...
  14. W

    Arlo1 Inverter build for Emrax 268

    I only checked the pwm with 50% dutycycle and it looked ok. I will also check with 5% and 90% and i'm taking a look at which phase is causing the desat. maybe it's always the same.
  15. W

    Arlo1 Inverter build for Emrax 268

    Yes, the polarity of the current sensors is correct. I also tested the inverter with a 12V battery at first. With 12V i was able to perform the current sensor calibration. I also could spin the motor without desat triggering. Now with 380V you can hear the calibrating noise for one moment and...
  16. W

    Arlo1 Inverter build for Emrax 268

    Yes, the wheels are off the ground at the moment and i have the hall sensors ready to be connected to the brain board. I stay in sensorless for now, because it is not possible to calibrate the hall sensors with the fast desat triggering. The current sensor offset measurement is also triggering...
  17. W

    Arlo1 Inverter build for Emrax 268

    This topic is about an inverter based on the "Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15" from Arlo1. (https://endless-sphere.com/forums/viewtopic.php?f=30&t=63982) It will be used for an Emrax 268 (medium voltage) motor. I'm finally in the stage were everything is complete and...
  18. W

    build your very own Lebowski controller !

    You can find some information in the manual, topic "j) CAN Setup", page 21. I quote: "During motor use the RS232 is dormant. Normally no information is transmitted but when the controller receives a single lower-case letter according to the table it will start transmitting 16 bit data at a rate...
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