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From: Michael on 4 Oct 2009 12:48
Does Park's Transformation (dqo transformation) vary with the number of poles for a permanent magnet synchronous motor? If it does change with the number of poles does anyone have the generic pole dependent derivation?

I have seen some diagrams in several books that show the d and q axis NOT perpendicular to each other and the number of poles was not 2.

Thanks,
Michael
From: Sinem on 5 Oct 2009 08:08
What I know about dq0 tranformation is that it is just a plain rotation matrix (when you transform from alpha beta) which is also used in robotics theory. So it does not depend on poles, neither on any parameter of the motor, since what dq0 tranformation does is just projecting the phase quantities on to a rotating 2 axis frame. (the sine and cosine comes from here)


"Michael" <controlengineer(a)harbornet.com> wrote in message <haajk1$1tb$1(a)fred.mathworks.com>...
> Does Park's Transformation (dqo transformation) vary with the number of poles for a permanent magnet synchronous motor? If it does change with the number of poles does anyone have the generic pole dependent derivation?
>
> I have seen some diagrams in several books that show the d and q axis NOT perpendicular to each other and the number of poles was not 2.
>
> Thanks,
> Michael
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