LAUNCHXL-F28379D: DRV8305 Current sense

user4928118

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: BOOSTXL-DRV8305EVM, CONTROLSUITE, DRV8305

Hello,
I use LAUNCHXL-F28379D and BOOSTXL-DRV8305EVM.
While sensing current, I expect the total current in the A, B, C channels of a motor to be close to 0. As a result of the current measurement I have made, I encounter a situation like a picture. These values are the values I took note of while the engine is running. Are these values normal? Or am I unable to measure with the BOOSTXL-DRV8305EVM with the sum close to 0?

over 5 years ago

0 Yanming Luo over 5 years ago

TI__Guru** 117230 points

Yes, the sum of the three-phase currents should be close to zero. Please check if the trigger SOC of the ADC is set correctly, and the offset of the amplifier is subtracted.

You might refer to an example in controlSUITE that uses DRV8305.

CONTROLSUITE
http://www.ti.com/tool/CONTROLSUITE

C:\ti\controlSUITE\development_kits\TIDM-SERVO-LAUNCHXS\MonoMtrServo_377s_v1_00_00_00

0 user4928118 over 5 years ago in reply to Yanming Luo

Intellectual 270 points

I checked them out. Since there is a shunt resistor only in low side gates, I think this is the way to measure.

0 Yanming Luo over 5 years ago in reply to user4928118

TI__Guru** 117230 points

Go ahead, please refer to the example that should be workable.

C2000™︎ microcontrollers

C2000 microcontrollers forum

LAUNCHXL-F28379D: DRV8305 Current sense