Help... Trying to perform mathematical translation of delta winding to wye type machine. Then will build it to see if truly works similarly. Since this is a PMSM only need to worry about the stator. Does the below look correct??? Any comments and/or suggestions much appreciated!!! :)...
We are both on the same page here. Good discussion.
BTW, you said:
Calculating the acceleration from position feedback is a little more work than calculating the velocity but it can be done.
Ah... A double derivative. Now that can be "noisy". :)
Hi PNachtwey,
You asked:
No one has answered why a derivative gain should be off. Telmatrix, could you provide an example? I have motion systems where the shaft was bent an I could see the effect of the bent shaft on the controller output.
I never said explicitly that derivative gain should...
PNachtwey... You said:
"Noise should not prevent one from using the derivative gain."
Noise can have lots of origins, and it may be cost-prohibitive to address it completely via "filters". For example, mechanical noise, which leads to torque oscillations, which reverbrate into the electrical...
Oops... I should clarify one sentence. I meant to say...
Therefore... I assume that since Eff = Pin/Pout, this implies that "all things being the same", in the dq0 frame that perhaps the expression that defines the torque should be slightly different (between a wye versus a delta). Perhaps...
Hey Skogsgurra... Many thanks for your reply.
I thought as much, but if one resides in the ABC reference frame, one should see differences in behavior (assuming the two different stator configuration machines are the same including test conditions). The wye winding is normally more efficient...
Well yes... From a controller standpoint, the two styles of windings are treated exactly the same, although some less expensive controllers need to read voltage from the common center of the wye winding.
From a motor design standpoint however there are some important differences related to...
For what it is worth... PID controllers remain the most widely used controller in industry today, primarily because they are simple, and usually easy to tune due to the reduced number of parameters that required consideration. There are several different classifications of PID algorithms which...
Yes... Skogsgurra is correct. There are many types of DC motors, so you'll need to clarify what you have and what is the typical load scenario/application if you wish to gather answers which are useful and relevant. Sounds like you have a DCPM machine however.
Other effects you will have to...
Hi Folks... Appreciate your help with this one that I have been wondering about lately. :)
It appears that most published literature (white papers) and texts like Krause or Ong really do not clarify if there are DQ transformation differences for PM synchronous machines with different stator...
