**Part Number:**TMS320F28027F

**Other Parts Discussed in Thread:**CONTROLSUITE, MOTORWARE

Hi everyone

I am using C:\ti\controlSUITE2_DMC Rev\development_kits\HVMotorCtrl+PfcKit_v2.1\HVACI_Scalar

I am trying to have the current of motor (like all of VFD's which they can display).

because in V/F control method we don't have theta value of motor so we can not use this equation.

// read Id and Iq vectors in amps

gMotorVars.Id_A = _IQmpy(CTRL_getId_in_pu(ctrlHandle), _IQ(USER_IQ_FULL_SCALE_CURRENT_A));

gMotorVars.Iq_A = _IQmpy(CTRL_getIq_in_pu(ctrlHandle), _IQ(USER_IQ_FULL_SCALE_CURRENT_A));

// calculate vector Is in amps

gMotorVars.Is_A = _IQsqrt(_IQmpy(gMotorVars.Id_A, gMotorVars.Id_A) + _IQmpy(gMotorVars.Iq_A, gMotorVars.Iq_A));

so my question is how to get Motor Current ?

is that ok if I calculate it such a way?

Ia,Ib,Ic into CLARKE transformation so we will have I_alpha and I_beta

and we calculate

MotorCurrent = Sqrt((I_alpha *I_alpha ) +(I_beta *I_beta ));

shall we do that?

please help me to understand how to get Motor Current (like all of VFD's) ?

thanks for attention.

Dave.