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Thread: BLDC motor control with Eval-M1-099M and Eval-M1-05F804

  1. #1
    Beginner Beginner JensM is on a distinguished road
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    BLDC motor control with Eval-M1-099M and Eval-M1-05F804

    Hi there,

    I am currently testing the Eval-M1-099M together with Eval-M1-05F804.
    After installing latest software from MADK website, I was doing the configuration for my BLDC-motor within the Tiny Wizard.
    Inside MCE, I was loading the EVAL-M1-099M.irc and my motor configuration as well.

    Since my motor is made for small applications only, I need to meet following restrictions:

    Max Voltage: 14 volts
    Max Current: 8 Amps

    Thus, I have removed some resistors from the Eval-M1-05F804 board and added one bridge as it was described by the documentation because of the lower voltage supply at J4 (< 20 volts).

    Within the MCE I tried to start the motor, but nothing happens.

    Is there any way to test the boards without having actually a motor connected? Just to check the PWMs generated by the Eval-M1-099M board?

    Thank you.

    Regards,

    Jens

  2. #2
    Intermediate Intermediate forix is on a distinguished road
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    You wrote: ...because of the lower voltage supply at J4 (< 20 volts)..

    Figure 14 on page 20 of the user manual is showing the circuitry you mentioned. In case you remove R32 and R39 (R35 = bridge -> 0Ohm) you will have to provide an external VCC of <20V at TP23 or TP28 as the J4 supply path is disconnected.

  3. #3
    Beginner Beginner JensM is on a distinguished road
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    Hi forix,

    thanks for help. The motor seem to be starting somehow, but just for one second.... I was measuring the output signals, which went to zero after short time.
    The same effect appeared, when I monitored those signals without the motor was actually connected. It seems to be a security mechanism inside the EVAL board.
    It would be nice to test just the output signals (U,V,W). How can can I do that? Is there a basic setup available?


    Thanks.

  4. #4
    Beginner Beginner JensM is on a distinguished road
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    Hi forix again,

    I have checked the fault flags in MCE Designer. Both are at 8 decimal. Do you know where I can look for the fault list?

    Thank you.

  5. #5
    Beginner Beginner JensM is on a distinguished road
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    Hi there,

    I have found the fault list. I also found a missing wire in figure 14 of the user manual. The motor is spinning for just one turn right now.
    It seems that the pulse signals becomes bad somehow. For now I feed the system with the same source at VCC and DCP. Maybe I should
    separate it...

    Thanks

  6. #6
    Beginner Beginner JensM is on a distinguished road
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    Hi again,

    the motor starts operating like expected, but after 3 revolutions LED 2 at EVAL-M1-099M starts blinking and the motor stops.
    Since I have put all the measured parameters into the wizard, everything should work well.....

    Thanks

  7. #7
    Beginner Beginner JensM is on a distinguished road
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    Hi again,

    for now I have solved my problems.
    The BLDC motor is spinning all the time :-)

    Greetings

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