给一个稍微具体的实现方式，仅供参考： （1）库函数，__weak void R3_1_GetPhaseCurrents( PWMC_Handle_t * pHdl, ab_t * pStator_Currents )是用于采集相电流，每一次只采a，b，c中2相，组合并不是固定的，根据sectorX来，修改这个函数，要知道波形是一个周期，可以根据sectorX的变化判断是否满足一个周期，在数据未达到一个周期前，根据需要把这些电流存起来 pHandle->_Super.Ia = pStator_Currents->a; pHandle->_Super.Ib = pStator_Currents->b; pHandle->_Super.Ic = -pStator_Currents->a - pStator_Currents->b; （2）如果采满一个周期，就开始计算RMS，这个可能需要一段时间，这期间就不用再存电流，等算好后，就可以显示；接着开始下一次取电流。 这样的方法不是实时的，有些电流周期数据没有计算进去，不过对于数码管这种低速的显示，应该是可以了。 另外也可以用纯硬件实现，比如，每次abc相电流采样结束，把电流值用dac输出，然后再接到专用有效值芯片，那么芯片就一直输出有效值，供mcu的adc采集就可以，这样不需要mcu参加有效值的计算。
结帖了，我的思路是正确的，先是硬件调坏了一块 后是电机烧了一个，调到怀疑人生。现在把改后的代码贴出来，方便大家查阅 void R3HD2_GetPhaseCurrents( PWMC_Handle_t * pHdl, Curr_Components* pStator_Currents ) { uint8_t bSector; int32_t wAux; WMC_R3_HD2_Handle_t * pHandle = (PWMC_R3_HD2_Handle_t *) pHdl; /* Deactivate TIMx CH4 to disable next triggers using bit-banding access */ *(uint32_t*) (pHandle->wTIMxCH4_BB_Addr) = 0u; /* Reset the SOFOC flag to indicate the start of FOC algorithm*/ pHandle->bSoFOC = 0u; bSector = (uint8_t) pHdl->hSector; switch ( bSector ) { case SECTOR_4: case SECTOR_5: /* Current on Phase C is not accessible */ /* Ia = PhaseAOffset - ADC converted value) */ wAux = (int32_t)( ADC1->JDR1 ); wAux *= 2; wAux = wAux - (int32_t)( pHandle->wPhaseAOffset ) ; /* Saturation of Ia */ if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component1 = -INT16_MAX; } else if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component1 = INT16_MAX; } else { pStator_Currents->qI_Component1 = (int16_t) wAux; } /* Ib = PhaseBOffset - ADC converted value) */ wAux = (int32_t)( pHandle->pParams_str->ADCx2->JDR1 ); wAux *= 2; wAux = wAux - (int32_t)( pHandle->wPhaseBOffset ) ; /* Saturation of Ib */ if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component2 = -INT16_MAX; } else if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component2 = INT16_MAX; } else { pStator_Currents->qI_Component2 = (int16_t) wAux; } break; case SECTOR_6: case SECTOR_1: /* Current on Phase A is not accessible */ /* Ib = PhaseBOffset - ADC converted value) */ wAux = (int32_t)( ADC1->JDR1 ); wAux *= 2; wAux = wAux - (int32_t)( pHandle->wPhaseBOffset ) ; //Ib /* Saturation of Ib */ if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component2 = -INT16_MAX; } else if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component2 = INT16_MAX; } else { pStator_Currents->qI_Component2 = (int16_t) wAux; } /* Ia = -Ic -Ib */ wAux = (int32_t)( pHandle->pParams_str->ADCx2->JDR1 ); wAux *= 2; wAux = (int32_t) pHandle->wPhaseCOffset - wAux; //Ic wAux -= (int32_t) pStator_Currents->qI_Component2; //-Ic-Ib wAux = -wAux-pStator_Currents->qI_Component2 /* Saturation of Ia */ if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component1 = INT16_MAX; } else if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component1 = -INT16_MAX; } else { pStator_Currents->qI_Component1 = (int16_t) wAux; } break; case SECTOR_2: case SECTOR_3: /* Current on Phase B is not accessible */ /* Ia = PhaseAOffset - ADC converted value) */ wAux = (int32_t)( ADC1->JDR1 ); wAux *= 2; wAux = wAux - (int32_t)( pHandle->wPhaseAOffset ) ; /* Saturation of Ia */ if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component1 = -INT16_MAX; } else if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component1 = INT16_MAX; } else { pStator_Currents->qI_Component1 = (int16_t) wAux; } /* Ib = -Ic -Ia */ wAux = (int32_t)( pHandle->pParams_str->ADCx2->JDR1 ); wAux *= 2; wAux = (int32_t) pHandle->wPhaseCOffset - wAux; wAux -= (int32_t) pStator_Currents->qI_Component1; /* Saturation of Ib */ if ( wAux > INT16_MAX ) { pStator_Currents->qI_Component2 = INT16_MAX; } else if ( wAux < -INT16_MAX ) { pStator_Currents->qI_Component2 = -INT16_MAX; } else { pStator_Currents->qI_Component2 = (int16_t) wAux; } break; default: break; } pHandle->_Super.hIa = pStator_Currents->qI_Component1; pHandle->_Super.hIb = pStator_Currents->qI_Component2; pHandle->_Super.hIc = -pStator_Currents->qI_Component1 - pStator_Currents->qI_Component2; }复制代码
