CCS/TMS320F28069M: Elec

Kwan Hyoung Lee

Intellectual 860 points

Part Number: TMS320F28069M
Other Parts Discussed in Thread: MOTORWARE

Tool/software: Code Composer Studio

I have DRV8301-HC-EVM Rev D_28069M Kit.

I use the motorware proj_lab12b.

I have a BLDC motor.(20poles = 10 pole pairs)

I have a few questions.

if(EST_getState(obj->estHandle) == EST_State_Rs)
    {
        ENC_setZeroOffset(encHandle, (uint32_t)(HAL_getQepPosnMaximum(halHandle) - HAL_getQepPosnCounts(halHandle)));
    }

Do I not have to use the ENC_setZeroOffset function?

If gMotorVars.Flag_Run_Identify is set to 1, should the electrical angle be 1 to become EST_State_OnLine?

How many electrical angles do you have to be EST_State_OnLine? (0< electrical angles<1)

over 6 years ago

0 Yanming Luo over 6 years ago

TI__Guru** 116490 points

1. Yes, it must have to do the zero offset calibration for the incremental encoder.

2. The electric angle will be zero always before the encoder calibration is finished.

0 Kwan Hyoung Lee over 6 years ago in reply to Yanming Luo

Intellectual 860 points

Is the ENC_setZeroOffset function a function that makes the electrical angle zero?

0 Yanming Luo over 6 years ago in reply to Kwan Hyoung Lee

TI__Guru** 116490 points

Right, that will force the rotor to rotate to zero position, the electrical is zero also.

0 Kwan Hyoung Lee over 6 years ago in reply to Yanming Luo

Intellectual 860 points

I don't use incremental encoder and I use absolute encoder.

I don't want to use the ENC_setZeroOffset function.

If Flag_Run_Identify is 1, I want to be CTRL_State_OnLine and EST_State_OnLine without Rs.

But electric angles should always be known.

Please tell me how.

0 Yanming Luo over 6 years ago in reply to Kwan Hyoung Lee

TI__Guru** 116490 points

Just need to set the gMotorVars.Flag_enableRsRecalc to "false" if you make sure that you don't need the offset calibration for the encoder and know the correct rotor position during the startup.

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CCS/TMS320F28069M: Elec