DRV8312: How to measure motor current in using Instaspin

Abhishek Vazrekar93

Intellectual 555 points

Part Number: DRV8312
Other Parts Discussed in Thread: CONTROLSUITE

I need to measure the motor current of sensor less BLDC ?Is it possible to sense it without any extra hardware?

I am using DRV8312 kit F28027.

over 7 years ago

0 Rick Duncan over 7 years ago

TI__Guru** 114905 points

Hi Abhishek,

Have you downloaded controlSUITE and accessed the schematics of the board?
The board has the ability to measure the individual currents and the total current.

0 Abhishek Vazrekar93 over 7 years ago in reply to Rick Duncan

Intellectual 555 points

Yes,I have seen the schematics.In software , gMotorVars.Is_A will give me the Total motor current right ?

0 Rick Duncan over 7 years ago in reply to Abhishek Vazrekar93

TI__Guru** 114905 points

Hi Abhishek,

In which file and folder did you find the variable gMotorVars.Is_A?

0 Abhishek Vazrekar93 over 7 years ago in reply to Rick Duncan

Intellectual 555 points

proj_lab10a in main.c

// calculate vector Is in amps
gMotorVars.Is_A = _IQsqrt(_IQmpy(gMotorVars.Id_A, gMotorVars.Id_A) + _IQmpy(gMotorVars.Iq_A, gMotorVars.Iq_A));

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DRV8312: How to measure motor current in using Instaspin