584,812 active members*
5,435 visitors online*
Register for free
Login

Search:

Type: Posts; User: kreutz

Page 1 of 17 1 2 3 4

Search: Search took 0.03 seconds.

  1. Re: 550W BLDC motor controller modifications for fun.

    Merry Christmas and a very Happy and Prosperous 2023 for everyone!!!
    All my work is on hold, still have many unfinished projects but they will be left for 2023. My workshop is a real mess and there...
  2. Re: 550W BLDC motor controller modifications for fun.

    No news, my daughter is moving and all the clutter got its way into the workshop.
  3. Re: 550W BLDC motor controller modifications for fun.

    For motor efficiency and power measurements you can always do something like this:

    https://www.youtube.com/watch?v=1Pd0lUKWe7o&feature=emb_logo

    But efficiency and power are only part of the...
  4. Re: 550W BLDC motor controller modifications for fun.

    I am still working on the dynamometer. Prices for the main components are way off the budget. I need a toque sensor capable of measuring the torque ripple over the noise floor in the 0-15 Nm torque...
  5. Re: 550W BLDC motor controller modifications for fun.

    Found this test on the internet, it is the same 550W BLDC motor and controller. The author uses an improvised Prony Brake to do the test.
    ...
  6. Re: 550W BLDC motor controller modifications for fun.

    I will probably test the 750 W motor and controller using the potentiometer for speed control, I will post the results and some photos. It is getting difficult to upload videos since the internet...
  7. Thread: PMinMO Status

    by kreutz
    Replies
    6
    Views
    5,123

    Re: PMinMO Status

    Phil;

    It has been a long time, but I won't forget your help when I needed a device to help me assemble smt components by hand, I still have it. I am sorry to hear about your ordeal. I hope...
  8. Re: 1.5 kw spindle motor trips out on internal motor overload

    Congratulations, some times perseverance is the best solution!!
  9. Re: 1.5 kw spindle motor trips out on internal motor overload

    What is the problem with the original motor controller? Why is is not possible to control it from your software side? Is it possible to make some kind of adapter for it to be controllable? I read the...
  10. Re: 550W BLDC motor controller modifications for fun.

    We may try, but my opinion is that with only 3 pole pairs and trapezoidal BEMF, there will be a noticeable torque ripple (even with FOC control) at low speeds, at higher speeds the load inertia might...
  11. Re: 550W BLDC motor controller modifications for fun.

    WHAT IS FIELD ORIENTED CONTROL (and how to control Permanent Magnet Synchronous Motors (AC permanent magnet servos and BLDC) ?

    Here is an explanation:
    ...
  12. Re: 550W BLDC motor controller modifications for fun.

    This is definitively not the time to do new projects, still most of the parts, that come to mind when planning a new design, are out of stock. Even the development boards. I will continue to work...
  13. Re: 550W BLDC motor controller modifications for fun.

    For a faster 0 - Vmax (approx 2 seconds) response replace R2 by 4.7 Kohms and R4 by 180 Kohms resistor (when using 5 Kohms potentiometer). The original circuit in the Rev 001 schematic has a...
  14. Re: 550W BLDC motor controller modifications for fun.

    SPEED CONTROL USING POTENTIOMETER

    all resistors 1/4 W

    Potentiometer 4.7 k or 5 kOhms 1/2 W or bigger (due to shaft Isolation issues), I used RV24YN20S 5K Potentiometer, you might have to...
  15. Re: 550W BLDC motor controller modifications for fun.

    What I have found so far on the VEVOR BLDC 550W "servo" motor/controller set.

    -What they call "SERVO" is not such, it is just a speed controlled brushless motor/ controller with HALL sensor...
  16. Re: 550W BLDC motor controller modifications for fun.

    I forgot to add the following to yesterday's list:

    -ST-IHM09M2 board, it is an interface board between the ST-Nucleo boards and the ST-IPM10B power board.
    -High Voltage Differential input probe...
  17. Re: 550W BLDC motor controller modifications for fun.

    Test instruments and materials list (so far):
    -3 isolation transformers
    -Multimeter
    -Low voltage lab power supply
    -High Voltage Lab power supply
    -ST-linkV2-Isol Isolated debugger/programmer...
  18. Re: 550W BLDC motor controller modifications for fun.

    The workshop survived the hurricane, now I need to re-organize everything in order to continue working on this project.

    Since it is not a "good project" if it doesn't generate at least one...
  19. Re: 550W BLDC motor controller modifications for fun.

    All work on this project will be stopped for a little while due to hurricane Ian interference, I need to secure and cover everything in the workshop, just in case. Power has already failed two times,...
  20. Re: 550W BLDC motor controller modifications for fun.

    BLDC motor controller, not (IPM) 3 phase motor controller, although they both could be driven with the same hardware.

    That is the reason why I only need 1 or 2 current sensors, in 6 steps...
  21. Re: 550W BLDC motor controller modifications for fun.

    Let's also be clear from the beginning: I DON'T SELL ANYTHING, NEITHER I WANT TO MAKE THE CHEAPEST, MORE ECONOMICAL SOLUTION FOR "ANY" BLDC MOTOR CONTROL. BLDC motor controller design and motor...
  22. Re: 550W BLDC motor controller modifications for fun.

    Let's start with a block diagram description of the future BLDC motor controller.
    It will need:
    - Power cord receptacle
    - Line EMI and common mode noise filter
    - Bridge rectifier
    - Inrush...
  23. Re: 550W BLDC motor controller modifications for fun.

    I was prepared to give a large speech about why "NOT ALL THE PERMANENT MAGNET BRUSHLESS MOTORS AND CONTROLLERS ARE CREATED EQUAL" and describe the different method of "Conmutation Control"...
  24. Re: 550W BLDC motor controller modifications for fun.

    Here are the ST evaluation boards I was talking about, I will be starting to write software for this project in a little while, just waiting for parts to repair my 400Vdc/5A lab power supply to...
  25. Re: 550W BLDC motor controller modifications for fun.

    Here is the photo of the controller's front panel. I just realized that there are many of this sets for sewing machines around but there are differences between them.
  26. Re: 550W BLDC motor controller modifications for fun.

    The documentation on the micro controller's manufacturer page is mostly in chinese, no english translated useful documents on their page, apparently they have their own ISP programmer, MMlink...
  27. Re: 550W BLDC motor controller modifications for fun.

    The relay to the right on the pcb (top side) is used for the voltage doubler function for 120Vac operation, the voltage doubler raises the filtered rectified voltage to approx 310-320 Vdc, the two...
  28. Re: 550W BLDC motor controller modifications for fun.

    Found another guy trying to reverse engineer a similar BLDC controller, possibly an older model of the one I have. Look at:...
  29. Re: 550W BLDC motor controller modifications for fun.

    6 magnets, 3 pole pairs.
    I don't think the program listing will be available, Looking at the microcontroller's datasheet, there is little chance they are doing anything else than 6 steps...
  30. Re: 550W BLDC motor controller modifications for fun.

    The controller board has:

    line voltage input connectors, fuse, bridge rectifier, 2x 680 uF/250Volts capacitor bank, 1 dc/dc converter ic (Viper22a-E) and associated circuit for +15Volts power...
Results 1 to 30 of 500
Page 1 of 17 1 2 3 4