[参考译文] INSTASPINFOCMOTORWAREGUI：缩放单个反馈传感器 instaspin

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https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1502640/instaspinfocmotorwaregui-scaling-individual-feedback-sensors-instaspin

部件号：INSTASPINFOCMOTORWAREGUI

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您好、

我们将 instaspin FOC 用于中等功率逆变器。在评估过程中、我们注意到电流反馈传感器中存在线性误差。它们存在因传感器而稍有不同的传感器缩放误差。当电机运行时、这在电机的相位中显示为相电流失衡约为13%。如何针对代码中的各个感测调节误差进行调整？我是否会在以下代码中添加乘法常量？

//! \brief      Reads the ADC data
//! \details    Reads in the ADC result registers, adjusts for offsets, and
//!             scales the values according to the settings in user.h.  The
//!             structure gAdcData holds three phase voltages, three line
//!             currents, and one DC bus voltage.
//! \param[in]  handle    The hardware abstraction layer (HAL) handle
//! \param[in]  pAdcData  A pointer to the ADC data buffer
static inline void HAL_readAdcData(HAL_Handle handle,HAL_AdcData_t *pAdcData)
{
  HAL_Obj *obj = (HAL_Obj *)handle;

  _iq value;
  _iq current_sf = HAL_getCurrentScaleFactor(handle);
  _iq voltage_sf = HAL_getVoltageScaleFactor(handle);


  // convert current A
  // sample the first sample twice due to errata sprz342f, ignore the first sample
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_1);
  value = _IQ12mpy(value,current_sf) - obj->adcBias.I.value[0];      // divide by 2^numAdcBits = 2^12
  pAdcData->I.value[0] = value;

  // convert current B
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_2);
  value = _IQ12mpy(value,current_sf) - obj->adcBias.I.value[1];      // divide by 2^numAdcBits = 2^12
  pAdcData->I.value[1] = value;

  // convert current C
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_3);
  value = _IQ12mpy(value,current_sf) - obj->adcBias.I.value[2];      // divide by 2^numAdcBits = 2^12
  pAdcData->I.value[2] = value;

  // convert voltage A
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_4);
  value = _IQ12mpy(value,voltage_sf) - obj->adcBias.V.value[0];      // divide by 2^numAdcBits = 2^12
  pAdcData->V.value[0] = value;

  // convert voltage B
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_5);
  value = _IQ12mpy(value,voltage_sf) - obj->adcBias.V.value[1];      // divide by 2^numAdcBits = 2^12
  pAdcData->V.value[1] = value;

  // convert voltage C
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_6);
  value = _IQ12mpy(value,voltage_sf) - obj->adcBias.V.value[2];      // divide by 2^numAdcBits = 2^12
  pAdcData->V.value[2] = value;

  // read the dcBus voltage value
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_7);     // divide by 2^numAdcBits = 2^12
  value = _IQ12mpy(value,voltage_sf);
  pAdcData->dcBus = value;

  // read the dc total current

  return;
} // end of HAL_readAdcData() function


//! \brief      Reads the ADC data
//! \details    Reads in the ADC result registers, and
//!             scales the values according to the settings in user.h.  The
//!             structure gAdcData holds three phase voltages, three line
//!             currents, and one DC bus voltage.
//! \param[in]  handle    The hardware abstraction layer (HAL) handle
//! \param[in]  pAdcData  A pointer to the ADC data buffer
static inline void HAL_readAdcDataWithOffsets(HAL_Handle handle,HAL_AdcData_t *pAdcData)
{
  HAL_Obj *obj = (HAL_Obj *)handle;

  _iq value;
  _iq current_sf = HAL_getCurrentScaleFactor(handle);
  _iq voltage_sf = HAL_getVoltageScaleFactor(handle);


  // convert current A
  // sample the first sample twice due to errata sprz342f, ignore the first sample
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_1);
  value = _IQ12mpy(value,current_sf);
  pAdcData->I.value[0] = value;

  // convert current B
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_2);
  value = _IQ12mpy(value,current_sf);
  pAdcData->I.value[1] = value;

  // convert current C
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_3);
  value = _IQ12mpy(value,current_sf);
  pAdcData->I.value[2] = value;

  // convert voltage A
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_4);
  value = _IQ12mpy(value,voltage_sf);
  pAdcData->V.value[0] = value;

  // convert voltage B
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_5);
  value = _IQ12mpy(value,voltage_sf);
  pAdcData->V.value[1] = value;

  // convert voltage C
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_6);
  value = _IQ12mpy(value,voltage_sf);
  pAdcData->V.value[2] = value;

  // read the dcBus voltage value
  value = (_iq)ADC_readResult(obj->adcHandle,ADC_ResultNumber_7);
  value = _IQ12mpy(value,voltage_sf);
  pAdcData->dcBus = value;



  return;
} // end of HAL_readAdcDataWithOffsets() function

请注意、这不是初始校准时的偏移、而是缩放误差。我需要分别调整传感器。有没有好的方法来实现这一点？

/Mikael

6 个月前