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Some troubles in indentification of the ACIM

Immortal King
Prodigy 135 points

Other Parts Discussed in Thread: MOTORWARE

Dear,

    Now I have some troubles in indentification of the ACIM.

    1、When I do the indentification of the ACIM,before the EST_State_LockRotor state the motor spin continuously and stable,after the EST_State_LockRotor,reenable the indetification,the motor not spin continuously,at the start of the EST_State_Ls state the motor spin continuously but a while later the motor stoped before the EST_State_Rr state comming.I have seen the "Troubleshooting Ls Identification .It is important that the motor is spinning during the entire inductance identification process. If at any point during the identification of the inductance the motor stops,increase the frequency used for Flux and inductance estimation".I have been doing according to the above increase the frequency(the initialize value frequency is 10HZ I change it to 20HZ) but the motor still stop at EST_State_Ls state.What should I do when this problem happened?  

    2、Although the above problem happened,the motor identification still passed.I using the identification parameters and run the motor,the EST_getSpeed_krpm() funcation return value correctly(eg. when I set gMotorVars.SpeedRef_krpm to 1.0 the motor spin at about 1000RPM and the estimtion speed value about 1000RPM also).But usig these parameters the motor maximum speed is 3000RPM,when I set gMotorVars.SpeedRef_krpm to 3.5 the motor speed does not increase(my motor can easily spin at 10000RPM by the VF control),why the motor maximum speed is 3000RPM,which value limit the speed?I try to increase the USER_MOTOR_MAX_CURRENT value ,but have no effect?

     3、I'm using the same user.h at motorware_1_01_00_09 the maximum speed is 3000RPM,but at the motorware_1_01_00_10 maximum speed is 1600RPM,Why?What is the difference between the motorware_1_01_00_09 and the motorware_1_01_00_10?

     Who can help me?Thanks very much!

  • 0
    Genius 4585 points

    Dear  Immortal,

    I found same problem in case 1 and 2. Still i am not checking case 3.

    in case 2: my AC induction motor is 50Hz, 415V, 2900rpm, 1 pole pair,  up to 2.6 value of gMotorVars.SpeedRef_krpm variable motor running OK. but when i set 2.7 and more, motor running with variation speed. Example i set 2.7 than motor running with 2.5 to 2.7 krpm speed with variation. 

  • 0 in reply to Amtech
    TI__Guru** 119680 points

    There are known issues with ACI Motor ID.  We are creating a software patch as an example project that will allow all ACI motors to properly ID. This will be released in first quarter after further testing.  We have quite a few very different ACI motors now that are allowing us to see some of the places where our scaling needed to be adjusted as we ID'd.

    This is similar to first release of InstaSPIN-FOC where many low flux or low inductance synchronous motors would not ID correctly.  We corrected this by introducing proj_lab2C which - when combined with correct hardware and variable choices - allows for proper ID.

    I apologize this has taken so long but it is being addressed and it WILL be fixed.  We are actually able to ID all the problem ACI motors already, but we will do further testing and documentation before we release in first quarter 2014.

    I want to be clear that this problem is just for the parameter ID.  With good parameters - from ID, measurement, or datasheet - FAST and InstaSPIN solutions work exactly as expected.

     

  • 0 in reply to ChrisClearman
    Prodigy 135 points

    Hi Chris,

        Thanks a lot.

        You mean my motor parameters are not properly identify?My motor is not a standard ,I mean I don't know the motor's parameter(eg.rated frequence,rated current),I don't have it's datasheet.In this case how can I do the identification?

  • 0 in reply to Immortal King
    TI__Guru** 119680 points

    Correct, if your ACIM is not running properly it is more than likely because parameters are mis-identified. There could also be issues with hardware and software scaling, but that is less likely considering we know that the ACI ID is not working for most ACI motors.

    As mentioned, we are fixing this and will release as soon as we can in 2014.