TMS320F28027F: using two current sensor

Dave Hunson

Expert 1760 points

Part Number: TMS320F28027F
Other Parts Discussed in Thread: MOTORWARE

hi every one!

a.what change should be made in code when we use two sensor ?

as far as I know we should consider the sign of current - or + ,and we should put USER_NUM_CURRENT_SENSORS 2

b,Is that mater which phases should have sensor ?

Please explain about it.

thanks in advance.

regards

Dave.

over 7 years ago

0 Yanming Luo over 7 years ago

TI__Guru** 117080 points

You just need to set USER_NUM_CURRENT_SENSORS to (2) in user.h if you are working on an example project in motorWare and the current sensors are connected to Phase A&B. Of course, you must consider the sign of current convert in HAL_readAdcData() in hal.h as you mentioned.

Or you can keep USER_NUM_CURRENT_SENSORS to (3) in user.h, just add below code in HAL_readAdcData() in hal.h to replace the ADC reading.
pAdcData->I.value[2] = -(pAdcData->I.value[0] + pAdcData->I.value[1] ).

0 Dave Hunson over 7 years ago in reply to Yanming Luo

Expert 1760 points

Thanks Dear Luo .

what if we use B&C? is that Ok if consider this equation for A?

pAdcData->I.value[0] = -(pAdcData->I.value[2] + pAdcData->I.value[1] ).

Thanks for attention

Best wishes.

Dave.

0 Yanming Luo over 7 years ago in reply to Dave Hunson

TI__Guru** 117080 points

It's correct as you mentioned above if you want to use B&C.

0 Dave Hunson over 7 years ago in reply to Yanming Luo

Expert 1760 points

Thank you Dear Luo
You always help me :)
Best wishes.

Dave.

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TMS320F28027F: using two current sensor