TMS320F28069: V/F example for inverter

Hi !   OK..I"m sending you a single phase inverter source code based in 28069, but it's I thing available in all of models of MCU....

void device_start(void)
    {
    if(!FAULT)
 {
 switch(OPERATION_MODE)
 {
 case 0:
 FULL_SYSTEM_DISABLE();
 INV_COUNTING++;
 if(INV_COUNTING>SEC_5)
 { INV_COUNTING = SEC_5;
 Control_Init();
 OPERATION_MODE = 1;
 INV_COUNTING = 0;
 if ( I_bat  < -2.0 ) {FULL_SYSTEM_DISABLE();FAULT = 4; }}
 break;

 case 1:
 if (V_dc > (0.98*INV_START))
 {INV_COUNTING++;
 if(INV_COUNTING>(SEC_1))
 {INV_PWM_ENABLE();
 OPERATION_MODE = 2; AC_PEAK_SETTING = 0.05;
 INV_COUNTING = 0;}}

 if (V_dc < DC_CRITICAL_POINT)             {FULL_SYSTEM_DISABLE(); FAULT = 9;}
 if (I_bat > BAT_CUR_MAX)                    {FULL_SYSTEM_DISABLE(); FAULT = 4;}
 if ( I_bat  < -2.0 )                     {FULL_SYSTEM_DISABLE(); FAULT = 5;}
 break;

 case 2:
 V_dc_ref = INV_START;  cur_cntl();
 V_ac_ref = sin1_value; AC_PEAK_SETTING+=0.00007;
 RELAY_LOAD_ON;
 if (AC_PEAK_SETTING > 0.9 )
 { AC_PEAK_SETTING = 0.9;
 INV_COUNTING++;
 if(INV_COUNTING>(SEC_1))
 {INV_COUNTING = SEC_1;
 OPERATION_MODE = 3;
 INV_COUNTING = 0;}}

 if (V_dc < DC_OUT_MIN)                   {FULL_SYSTEM_DISABLE(); FAULT = 3;}
 if (V_dc < DC_CRITICAL_POINT)             {FULL_SYSTEM_DISABLE(); FAULT = 4;}
 if (I_bat > BAT_CUR_MAX)                    {FULL_SYSTEM_DISABLE(); FAULT = 5;}
 if ( I_bat  < -2.0 )                     {FULL_SYSTEM_DISABLE(); FAULT = 5;}
 break;

 case 3:
 V_dc_ref = INV_START;
 cur_cntl();
 V_ac_ref = sin1_value;
 pi_control(vol_err,AC_VOL_SET_PEAK,V_ac_peak_f,V_ac_sum,sample_time,AC_VOL_KP,AC_VOL_KI,-20.0,20.0);
 V_ac_kp = AC_VOL_KP*(AC_VOL_SET_PEAK - V_ac_peak_f);
 V_ac_peak_ref = (AC_VOL_SET_PEAK+vol_err);
 AC_PEAK_SETTING = V_ac_peak_ref / V_dc ;

 INV_COUNTING++;
 if(INV_COUNTING>(SEC_5))
 {INV_COUNTING = SEC_5;
 OPERATION_MODE = 4;
 INV_COUNTING = 0;}
 if (V_dc > (1.02*INV_START)) { no_load_cntl();}
 else
 { V_dc_ref = INV_START; cur_cntl();
 V_ac_ref = sin1_value; INV_CONTROL = 6.0;
 pi_control(vol_err,AC_VOL_SET_PEAK,V_ac_peak_f,V_ac_sum,sample_time,AC_VOL_KP,AC_VOL_KI,-20.0,20.0);
 V_ac_kp = AC_VOL_KP*(AC_VOL_SET_PEAK - V_ac_peak_f);
 V_ac_peak_ref = (AC_VOL_SET_PEAK+vol_err);
 AC_PEAK_SETTING = V_ac_peak_ref / V_dc ;}

 if (V_dc < DC_OUT_MIN)                   {FULL_SYSTEM_DISABLE(); FAULT = 3;}
 if (V_dc < DC_CRITICAL_POINT)             {FULL_SYSTEM_DISABLE(); FAULT = 4;}
 if (I_bat > BAT_CUR_MAX)                    {FULL_SYSTEM_DISABLE(); FAULT = 5;}
 if ( I_bat  < -2.0 )                     {FULL_SYSTEM_DISABLE(); FAULT = 5;}
 break;

 }
 FAULT_CHECKING();
 INV_PWM_CREATING();
  }
    }

  void open_loop_cntl(void)
 {
    est_theta   +=DELTA_THETA_60Hz; ////  DELTA_THETA_60Hz =  2 * 3.14 * 60 * sample_time ;
    if(est_theta>PI) {est_theta = est_theta - PI2;}
    if(est_theta<-PI){est_theta = est_theta + PI2;}
    }

    void INV_PWM_CREATING()
    {
    if (V_ac_ref > 0)   { VOL_POLE = 1; }
    else                      { VOL_POLE = 0; }

    switch(VOL_POLE)
    { case 1:
    inv_ref                     =   AC_PEAK_SETTING * V_ac_ref;
    PWM_COUNT_INV_REF[0]   =  (int16)(inv_ref*PWM_COUNT_INV_MAX);
    PWM_COUNT_INV_REF[1]  =  bound1(PWM_COUNT_INV_REF[0],PWM_COUNT_INV_MAX);
    EPwm1Regs.CMPA.half.CMPA = PWM_COUNT_INV_REF[1];
    EPwm2Regs.CMPA.half.CMPA    = 0;
    break;

    case 0:
    inv_ref                     =   - AC_PEAK_SETTING * V_ac_ref;
    PWM_COUNT_INV_REF[2]   =  (int16)(inv_ref*PWM_COUNT_INV_MAX);
    PWM_COUNT_INV_REF[3]  =  bound1(PWM_COUNT_INV_REF[2],PWM_COUNT_INV_MAX);
    EPwm1Regs.CMPA.half.CMPA = 0;
    EPwm2Regs.CMPA.half.CMPA    = PWM_COUNT_INV_REF[3];}}

    void INV_PWM_ENABLE(void)
    {
 INV = 1; FD = 0.0;
 EALLOW;
 GpioCtrlRegs.GPAMUX1.bit.GPIO0  = 1;
 GpioCtrlRegs.GPAMUX1.bit.GPIO1  = 1;
 GpioCtrlRegs.GPAMUX1.bit.GPIO2  = 1;
 GpioCtrlRegs.GPAMUX1.bit.GPIO3  = 1;
 EDIS;
    }

 Switching pattern used here is based to dual modulation . I thing it'll be helpful  for you ...

BY !

Sir,
I have imported the C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVACI_Scalar for 28069 device. I'm getting PWM output with build level 1, I wanted to know should PWM DAC also work ? I don't see any output at EPWM6 and 7. Does the change in device have any limitations ?
Please guide.

Sir, 

Are there any examples of inverter with sine modulated PWM individually or sine modulated PWM with V/F (the motor example has used space vector)?

I have tried using PWM in up-down mode and updated the compare register with (Total_period/2)+((Total_period/2) *A* sin(2*pi*f*t)) in the ISR, by which I'm able to generate varying PWM and able to get a sine wave after a filter. Can you please tell me is this how it is done?

eeddii iiiiii said:

Have   you   tested   the   code   I've   sent   you  ?

Hiii, iam doing single phase inerter with c2000 f28027 micro controller. will this above code help me in generating pulses from f28027 controller? please reply me.