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When to run Lab 2c

jim henderson
Intellectual 510 points

Should Lab 2c be run on every PMSM motor? Or only low inductance PMSM motors? How do I know if my motor is considered low inductance? The motor identification works fine in the previous labs. Is Lab 2c only run if you have problems with the motor identification?

  • 0
    TI__Guru** 118270 points

    lab2c is for high speed motors. most high speed motors have a very low Ls.

    you should use lab2c if:

    the value for ctrl.RoverL >= 2000 or is negative

    ctrl. is the structure for the F2802x and 5x, for 6x it uses controller_obj (which is a pointer) and then you can look at RoverL variable value.

    RoverL is calculated from the Rhf divided by the Lhf. These are the first estimates made on R and L during the initial high frequency test at the start of motor ID.

    Project 2c notes this variable limitation and allows a proper RoverL value for these motors (which are > 2000).