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TMDSHVMTRPFCKIT: TMDSHVMTRPFCKIT: Active Front End made of HVMotorCtrl+PFC V2.1. ver.II

Andrey.B.
Intellectual 335 points
Part Number: TMDSHVMTRPFCKIT
Other Parts Discussed in Thread: CONTROLSUITE

Good day!

I have alredy posted this question on Motor Drivers Forum  but unfortunately didn`t get any answer.

e2e.ti.com/.../542959
 

Is it possible,having two Motor control kits(TMDSHVMTRPFCKIT) , connect them together according Active Front End (AFE) + Inverter scheme?

Thank you for any help,

Andrey

  • 0
    TI__Guru** 115510 points
    Yes, it's ok. One is a inverter for motor drive, another one is a converter. The converter need to add the inductor on each phase as you showed above. But you should be noted that the power module only supports the maximum pwm frequency is 20kHz.
  • 0 in reply to Yanming Luo
    Intellectual 335 points

    Thank you  for your reply!

     But we have all our mesurments relatively to negative potential of DC bus.

    When we work in  AFE mode, negative potential of DC bus has a fluctuation depending on semiconductors state(opend or closed).

    It will resulti something like this(output invertor voltage (AFE+invertor modeling))

    Here voltage has a constant offset and can be compensated.  But will this offset be constant in real situation? Can we restore original values for feedback control?

  • 0 in reply to Andrey.B.
    TI__Guru** 115510 points
    You can refer to the DC/AC reference in controlSUITE as below, you need to change the voltage sampling circuit if you need the voltage feedback and use the inverter as a DC/AC.
    \ti\controlSUITE\development_kits\HV_1PH_DCAC
  • 0 in reply to Yanming Luo
    TI__Mastermind 43730 points

    It is not feasible to use the design as a AFE, because of the sensing issue, missing inductor etc.. you will be better of designing your own hardware.

    We have a three phase PFC 

    in case you are interested.. to understand from a sensing perspective, 

    though the above is not the best AFE for motor control because of only unidirectional operation of the power stage.