Vector control correct setting
Vector control correct setting
(OP)
How can i know that the vector drive is correctly setted and tuned? suppose i don't trust the auto-tuning and automatic parameters identification?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Vector control correct setting
|
RE: Vector control correct setting
Well, if your drive product came with trending software, you can trend various values to determine response times, etc. It all depends on how accurate you want the vector drive to be and when it runs within your personal specifications, then i am sure it is tuned well enough.
There really ain't any fast and set rules here.
If you don't trsut the auto tiuning of the drive, then you will have to obtain from the motor manufacturer the exact motor parameters for your motor and manually program those values into the drive.
These values are for the motor only and do not take into account cable lengths, resistance, reactors, dv/dT filters etc and some performance might be lost and still manual tuning might be required.
RE: Vector control correct setting
RE: Vector control correct setting
RE: Vector control correct setting
If you want to optimize your loop performance, you might try manually tuning it.
Drive speed loop tuning usually tunes manually quite easily. One caution--be sure the accel/decel settings are outside the PID loop. If inside, you need to set them both to zero to avoid having them override the loop response.
RE: Vector control correct setting
RE: Vector control correct setting
Read all parameters (the L:s and R:s) and compare with what is found when you autotune again. Make sure that the motor shaft doesn't move when taking the motor parameters. But remember that it shall be free to move (with load) when speed controller gain and integration time is tuned.
Compare what you get. If both sets are reasonably close (+/-10 percent), then you are all set.
If very unequal, try to use the newly acquired set of parameters.
But, as I said, Id and Iq changing with load is not a fault in a vector drive.
Gunnar Englund
www.gke.org
RE: Vector control correct setting
kindly waiting for your comment
RE: Vector control correct setting
I was thinking of an energy optimising drive that changes both Iq and Id. The Id will remain constant in an ordinary vector drive with a constant Im reference.
Gunnar Englund
www.gke.org