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Instaspin Lab02b ACIM identification error

Other Parts Discussed in Thread: MOTORWARE

I am trying to perform identification of an ACIM motor with lab02b. My motorware version is 14.

It performs identification with DC bus voltage 320V. There is no problem. But when I increase the DC bus voltage to 400V after EST_State_RatedFlux estimator state becomes EST_State_Error. At EST_State_RatedFlux state it seems that motor frequency is restricted to 1 Hz instead of 5 Hz. 

Actually my motor label is as follows:

Y connection:

Voltage:380 V

Frequency:50 Hz

Power:1500 W

Current: 3.6A

Poles: 4

Delta Connection:

Voltage:220 V

Frequency:50 Hz

Power:1500 W

Current: 6.2A

Poles: 4

My motor is delta connected and I wrote down following values in user.h

#define USER_MOTOR_TYPE MOTOR_Type_Induction
#define USER_MOTOR_NUM_POLE_PAIRS (2)
#define USER_MOTOR_Rr (NULL)
#define USER_MOTOR_Rs (NULL)
#define USER_MOTOR_Ls_d (NULL)
#define USER_MOTOR_Ls_q (NULL)
#define USER_MOTOR_RATED_FLUX (0.8165*220.0/50.0)
#define USER_MOTOR_MAGNETIZING_CURRENT (NULL)
#define USER_MOTOR_RES_EST_CURRENT (0.7)
#define USER_MOTOR_IND_EST_CURRENT (NULL)
#define USER_MOTOR_MAX_CURRENT (6.2)
#define USER_MOTOR_FLUX_EST_FREQ_Hz (5.0)

But I think instaspin assumes that the motor is Y connected, but my connection is delta. Is there any thing I need to change in the code for a delta connected motor?For an example do I need to change the values in user.h? 

 

  • You can find more information below:
    In motorware 14, for lab02b I am trying to identify the motor parameters. It is successful if I connect the motor in Y configuration. But it gives error if I connect the motor in delta configuration.
    Actually as you know at lab02b after estimator state EST_State_RatedFlux code will go to EST_State_RampDown and then EST_State_LockRotor. But in my case it goes to EST_State_Error after EST_State_RatedFlux.

    This error condition occured in delta connection of the motor. When I have changed the connection to Y configuration there is no error.

    What can be the reason for the estimator SW to enter into error state?
  • Hi,

    Let's use this post, as it is a duplicate: e2e.ti.com/.../443399

    -Jorge