Part Number: TMS320F28377D
Hi expert，
My customer is using 377d in industry inverter with an issue, could you help to give some advice? Thanks
In the PCS100kW INPC topology wave, when multiple DSPS are synchronizing carriers, the positive and negative half-cycle wave switching occurs, and the power frequency tube conducts half a switching cycle more than one time, resulting in excessive current
pwm code
void Int_PWMGenerator(UTILS_SVPWM_TYPE *pstPwmForNpcDataType)
{
HWREGH((EPWM1_BASE + (EPWM_O_CMPA + (uint16_t)EPWM_COUNTER_COMPARE_A)) + 0x1U) = pstPwmForNpcDataType->uiPwmCmpA;
HWREGH((EPWM2_BASE + (EPWM_O_CMPA + (uint16_t)EPWM_COUNTER_COMPARE_A)) + 0x1U) = pstPwmForNpcDataType->uiPwmCmpB;
HWREGH((EPWM3_BASE + (EPWM_O_CMPA + (uint16_t)EPWM_COUNTER_COMPARE_A)) + 0x1U) = pstPwmForNpcDataType->uiPwmCmpC;
/* Generate pwm */
if(0 == pstPwmForNpcDataType->uiPwmCmpD)
{
#pragma CHECK_MISRA("-12.4")
if((0 != pstPwmForNpcDataType->uiDutyCmpD) && ((HWREGH(EPWM1_BASE + EPWM_O_TBSTS) & EPWM_O_TBSTS_CTRDIR) == EPWM_AQ_COUNTING_DN))/* EPwm1Regs.TBSTS.bit.CTRDIR == TB_DOWN */
{
pstPwmForNpcDataType->uiPwmCmpD = pstPwmForNpcDataType->uiDutyCmpD;
HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) = ((HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) & ~EPWM_AQCTLB_ZRO_M) | ((uint16_t)EPWM_AQ_SW_OUTPUT_HIGH << EPWM_AQCTLB_ZRO_S));
}
else
{
pstPwmForNpcDataType->uiPwmCmpD = pstPwmForNpcDataType->uiDutyCmpD;
HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) = ((HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) & ~EPWM_AQCTLB_CBD_M) | ((uint16_t)EPWM_AQ_SW_OUTPUT_HIGH << EPWM_AQCTLB_CBD_S));
}
}
else if(pstPwmForNpcDataType->ulPwmPrd == pstPwmForNpcDataType->uiPwmCmpD)
{
if((pstPwmForNpcDataType->ulPwmPrd != pstPwmForNpcDataType->uiDutyCmpD) && ((HWREGH(EPWM1_BASE + EPWM_O_TBSTS) & EPWM_O_TBSTS_CTRDIR) == EPWM_AQ_COUNTING_UP))/* (EPwm1Regs.TBSTS.bit.CTRDIR == TB_UP) */
{
pstPwmForNpcDataType->uiPwmCmpD = pstPwmForNpcDataType->uiDutyCmpD;
HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) = ((HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) & ~EPWM_AQCTLB_PRD_M) | ((uint16_t)EPWM_AQ_SW_OUTPUT_LOW << EPWM_AQCTLB_PRD_S));
}
else
{
pstPwmForNpcDataType->uiPwmCmpD = pstPwmForNpcDataType->uiDutyCmpD;
HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) = ((HWREGH(EPWM1_BASE + EPWM_O_AQCTLB) & ~EPWM_
BR
Chi
