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Transfer Function from Motor Phase A, B and C to D and Q Current Reference

Question asked by Derek Cook on Jul 30, 2018
Latest reply on Aug 7, 2018 by Derek Cook

Hello, 

 

Is there a simple transfer function from A, B and C current to D and Q current reference? I see when my A, B and C RMS currents are are 36.78A, my Q current feedback is at 101A. This is about ~276%. I am just trying to figure out why the D and Q reference is so much larger and if there is an easier transfer function and the full Clarke and Park transform.

 

Does the rated current drive the limit on the D and Q reference, not the A, B and C? I am getting a motor stall fault when my Q current gets to 207A, whereas my RMS ABC current is about 50A. If this is the case we would need to put our rated current in terms of D, and Q?

 

Thanks for the help, 

 

Derek

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