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Four Steps to Field-Oriented Control -– The Final Two

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mithrandir
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Also...
mithrandir   3/28/2015 10:16:47 AM
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Also, is there any real 'loss' when you discretize the math? I know the C2000 is a floating point processor and this shouldn't really be an issue but I have seen a couple of fixed point cores doing FOC as well. 

Is there any true advantage of using floating vs fixed point for field oriented applications?

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Mithrandir

mithrandir
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A fun read
mithrandir   3/28/2015 10:11:03 AM
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@Dave

Thank you for the very nice series. I missed the last couple but caught up on them now.

I particularly enjoyed the Clarke and Park Transforms and what they implied to control loops. The whole bandwidth issue is something I've faced in the past, even more so in the digital domain(more here if you're interested).

One question though, does the control loop change when I'm trying to start up the motor? Can I just slowly ramp up the Id component and it'll work out? It looks like it should from the equations as the rotor flux is stationary the vectors past the park transform are clamped to the rotor reference frame

Thanks!

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