Remove the feedback_3ph.c file with a right mouse click and delete, then with a right mouse click --> properties remove the check from the box before Exclude from resource build .
If you don't go ahead and add the following line you will get compile warnings or errors(depending on your IDE).
#include "adc_sys.h"
Since there are only two phase currents measured they are referred to as Phase A and Phase B. So to properly assign the channels use Table 7 in the Adapting KMS for customer hardware document to change the ADC assignments for the ADC channel you connected to and are calling Phase B. This would be the channel sampled during Sample A on ADC1. In adc_sys.c you need to change the #define for that sample and channel.
/**
* @def ADC1_SAMPLEA_CHANNEL
* @brief Channel to sample for motor control on ADC 1 Sample A
* Phase B Current
*/
From:
#define ADC1_SAMPLEA_CHANNEL (kAdc16Chn0)
To:
#define ADC1_SAMPLEA_CHANNEL (kAdc16Chn3)
Then when feedback_2ph.c is called it will pick up the phase current you have connected.
I hope this helps.
Best Regards,
Philip
Back to the original question. I was corrected by the KMS system architect that the change from using current sense C in the place of current sense B in the feedback_2ph.c operation will have issuses with angle calculation. Here is what he told me:
" I'm concerned about him simply re-mapping the channels since they go into the 3 phase to 2 phase transform. That could cause issues with the angle estimation.
He would be better served by keeping the A & C samples mapped where they should be and modifying the code so that it does the reconstruction based on A & C samples. In the feedback_3ph.c file there is an example of all 3 different types of reconstruction in the following switch statement:
if (svpwmState != SVPWM_NORM)
{
switch(svpwmSector)
{
All he would need to do it look for which case is calculating the missing sample, in this case B which is:
case SVPWM_SECT2 :
case SVPWM_SECT3 :
He can then copy that code into feedback_2ph.c to replace the code that reconstructs the C sample."
Now to your other questions:
FOC control for PMSM or BLDC motors only use the 3 phase current or 2 phase current sense the DCBus current and the BC voltage to provide feedback. There are no voltage sense requirements.
There are several videos created to teach you about KMS --HERE. I suggest the "Introducing Concepts of FOC Motor Control" video as well as the discussion in the KMS API reference manual.
Regards,
Philip
