Part Number: TMS320F280039C
Tool/software:
I am currently working on a single-phase inverter, but I found that the Bode plot I ran in MATLAB is correct. However, after performing the Z-transform and implementing it in the MCU, it doesn't work. Additionally, my switching method is hybrid PWM. Could incorrect switching affect the circuit's functionality? Below is my program:
ei = i_ref - i_feedbackcorrect;
ui_per = b0_i * ei + b1_i * ei1 + b2_i * ei2 - a1_i * ui1 - a2_i * ui2;
ui_sat = ui_per;
if (ui_per > UI_MAX) ui_sat = UI_MAX;
else if (ui_per < UI_MIN) ui_sat = UI_MIN;
awi = ui_sat - ui_per;
ui1 += KAWI * awi;
ui2 = ui1;
ui1 = ui_sat;
ei2 = ei1;
ei1 = ei;
ui = ui_sat;
//High frequency arm
duty = fabsf(ui);
if (duty > 0.95f * 923)
{
duty = 0.95f * 923;
}
if(v_ref > 0)
{
EPwm1Regs.CMPA.bit.CMPA = duty;
}
else if (v_ref < 0)
{
EPwm1Regs.CMPA.bit.CMPA = 923-duty;
}
else
{
EPwm1Regs.CMPA.bit.CMPA = 0;
EPwm1Regs.CMPB.bit.CMPB = 0;
}
