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Is Driver Torque Infırmation Sensitive?

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Hello,

We use AC asynchronous servo motor, which is driven by S724 driver to test dc motors. Servo and dc motor connect with a coupling. Rated torque value is about 30Nm.

How much sensitive does "Torque actual value(6077h)" information? Is is safe enough and sensitive to use it as a test result?

In test industry, every sensor must be calibrated. If we use this torque information, authority will ask me "Where can i check its reliability?"

Does the result differ if i use a shaft type torque sensor between servo and dc motor?

Thanks for your help.  

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It depends on the accuracy you are looking for.

Using 6077h, whose definitioin per the S300/S700 Can-bus manual is "Torque Actual Value corresponds to the instantaneous torque in the drive motor.

The value is given per thousand of rated torque"

 

Your question seems to be whether or not to use a torque transducer or not. If you mathematically calculate the torque based on the 6077h ( and ultimately current ) and use the motor's Kt
constant you have consider that servo motors' Kt constant varies typically +/- 10% and also varies with temperature.
If you want the most accurate test data then consider using a torque transducer.
If you think the mathematical model may be accurate enough then you may still want to validate as a test using the torque transducer to compare theoretical vs. actual.
I found documentation for the S300 current loop resolution which is 16 bit. I assume it's the same for the S700.
 
I see you are located in Turkey. You may want to call our office there for further questions and support with your application.
 

Turkey

ELSİM ELEKTROTEKNİK SİSTEMLER SANAYİ VE TİCARET A.Ş.

Huzur Mah. Fazıl Kaftanoğlu Cad.No: 9
Kat:5
TR 34396
Seyrantepe / ISTANBUL

Turkey

[email protected]
+90 212 282 75 80
 

Comments

Ok.
Thank you for the information.

rmzn - Sat, 05/16/2020 - 15:10
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