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Some problem occurred when I identify the motor by lab2a

Hello,

I meet a problem when i ran the lab2a, the  details are as follows:

hardware: my own designed driver board with F28069m.

software: motorware1.13 & ccs5.5 & v6.2.3 compiler

error occurred when EST_State_RampUp, the motor could just speed up for 2 or 3 seconds, and it stop at the speed didn't reach the "right" value.

I had changed USER_R_OVER_L_EST_FREQ_Hz from 100Hz to 300Hz, but nothing changed.

the motor rated current is 20A, and if i  Enlarge USER_MOTOR_RES_EST_CURRENT from 2A to 3A(4A), the motor will more unstable and noise.

is there any factors related with RampUp i could check up.

and i think this Process is running in open-loop control,  whether the current and voltage feedback unrelated?

sorry for my poor English, offers my sincerest respect.