TMS320F28069: Motor Identification

Suhan Kwon

Prodigy 20 points

Part Number: TMS320F28069
Other Parts Discussed in Thread: DRV8305

Tool/software:

When I did Motor Identification,

the USER_MOTOR_Ls_d and USER_MOTOR_Ls_q values are different depending on the USER_VOLTAGE_FILTER_POLE_Hz value.

Why is that?

over 1 year ago

+1 Yanming Luo over 1 year ago

TI__Guru** 116090 points

USER_VOLTAGE_FILTER_POLE_Hz should be calculated correctly according to the voltage filter. You can't set it to the other values you want. The motor control and identify with FAST are related to this parameters.

0 Suhan Kwon over 1 year ago in reply to Yanming Luo

Prodigy 20 points

If I identifycation USER_VOLTAGE_FILTER_POLE_Hz as 583.56(1/(2pi*(30k*3k)/(30k+3k)*0.1*10^-6), the Ld, Lq values are 8*10^-12.

But, this is wrong. If i identification it as 344.618Hz by referring to the DRV8305 design example, i can get the normal value (8*10^-5).

I don't know why.

0 Yanming Luo over 1 year ago in reply to Suhan Kwon

TI__Guru** 116090 points

As mentioned above. The USER_VOLTAGE_FILTER_POLE_Hz is used for estimator. The motor control and identify with FAST are related to this parameters.

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TMS320F28069: Motor Identification