adccommunitymod (AutomationDirect) asked a question.
AC Closed Loop Vector Control
Created Date: May 11,2013
Created By: keklon
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Hello, I need some advise regarding AC Vector control. Can I use the GS3 AC drive to synchronize two independent machines using the RPM of the first machine as a reference to follow. I see an option of a feedback card. Does this allow me to input my reference rpm from the first machine?
Created Date: May 11,2013
Created by: plcnut
I don't have the experience to answer your question, but I think some pertinent questions would be:How closely do they need to be synchronized? How steady is the load on the motors?
Created Date: May 13,2013
Created by: jwbaker3
The feedback card is normally used to close the loop on the vector control from the motor to the drive for much better speed control. The encoder feedback is not used as a reference for speed control but as a feedback from the motor to the drive. The way we would do what you are talking about is make one of the drives the master and the other the slave. Have the drives talk to each other or use the analog output from the master as the reference for the slave. Use the encoders on the motors if you need closer control of the speed. Plcnut asked the correct questions, depending on load changes and how close the speed must be, the answers will determine if you need open loop or closed loop control.
JW
Created Date: May 11,2013
Created by: keklon
Hello,
I need some advise regarding AC Vector control. Can I use the GS3 AC drive to synchronize two independent machines using the RPM of the first machine as a reference to follow. I see an option of a feedback card. Does this allow me to input my reference rpm from the first machine?