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Vector control correct setting
- Thread starter HanyHamed
- Start date
Drivemaster,
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.
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.
- Thread starter
- #3
Maybe you can indicate to us all why you are thinking that your specific installation is not functioning correctly and why you do not believe that the vector auto tuning is not functioning. Maybe it is something totally different than what you think. Please provide us with more details and I am sure we might be able to help you out.
Autotuning is almost always quite conservative to avoid hunting and oscillation problems.
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.
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.
- Thread starter
- #6
Skogsgurra
Electrical
Both shall change with load in a vector drive. It is only in a scalar drive that Id is (relatively) constant with load. It is not usual that the autotuning goes wrong. Not with reputable manufacturer's drives.
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
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
- Thread starter
- #8
Skogsgurra
Electrical
Yes, you are right.
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
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
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