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Unable to command high speeds, some intermediate speeds unattainable

ipburbank
Prodigy 40 points

Other Parts Discussed in Thread: MOTORWARE

I have two BLDC motors and a DRV8301-69M-KIT. I am testing in InstaSPIN_MOTION_F2806xM 561.425.996 and lab05d.

In InstaSPIN_MOTION_F2806xM and an Anaheim Automation motor I have great control at low speeds - agitation at maximum acceleration and jerk from +- 1.5 KRPM works great. However, if I command a steady state above 2 KRPM (e.g. 10 KRPM) the motor ramps to ~1.7KRPM then the 8301 throws a fault. In CCS/the UNIVERSAL GUI using lab05d, if I command a steady state 10 KRPM the motor ramps up to ~1.7 KRPM, holds, and then jumps to ~2KRPM. If I command 1 KRPM again the motor holds 2 KRPM until ~1.7 KRPM is commanded again at which point it proceeds with the ramping down. Other times it just gets stuck at ~2KRPM and I have to disable 'Run' to get the motor to stop (even commanding 0 RPM doesn't work).

My second motor also throws a fault in InstaSPIN_MOTION_F2806xM at just under 5.5 KRPM but in lab05d spins up to 7k no problem.

Any idea what the problem might be and how I can fix it? I was hoping that in Universal GUI the driver would also throw the same faults so I could read them but it did not. Let me know what files/data I can provide to be of more help.

 

Best,

Istvan.

  • 0
    Guru 12800 points

    Istvan,

    ipburbank said:
    In InstaSPIN_MOTION_F2806xM

    I would recommend not using the old GUI, there have been code improvements that have not be added to this software.

    ipburbank said:
    if I command a steady state 10 KRPM the motor ramps up to ~1.7 KRPM, holds, and then jumps to ~2KRPM. If I command 1 KRPM again the motor holds 2 KRPM until ~1.7 KRPM is commanded again at which point it proceeds with the ramping down.

    What is the rated speed of your motor?  This sounds like normal behavior if your motor is rated to run at 1.7krpm.  Lab 05d does not have field weakening in order to run beyond rated speed.

    ipburbank said:
    I was hoping that in Universal GUI the driver would also throw the same faults

    The Universal GUI uses the latest Motorware which has some improvements over the over GUI, so using the older GUI is not recommended.