Space vectors Theory 3

[johndaniel]

Hello Folks,

Can somebody explain me the space vectors theory used in field orientation control of IM. How space vectors are obtained and how space vectors are different from space phasors?

Thanks

 

[dArsonval]

Google is your friend.

Perhaps you live near one of the 148 libraries listed at the URL below.

http://www.worldcat.org/title/elect...-a-space-vector-theory-approach/oclc/24318718

Or, for further scholarly work, start combing through this additional treasure-trove of source leads.

http://babel.hathitrust.org/cgi/ls?field1=ocr;q1="Space Vectors theory";a=srchls;lmt=all

The option for scrolling Table of Contents in all of the above works is also helpful.
And that makes for a very productive tool when searching for a specific subject.

Have fun!

John

 

[itsmoked]

If you look up "Field Oriented Control" instead of "orientation" you might have much better results.

FOC uses matrix calculations called the Clarke and Park transforms. The transforms convert the instantaneous complex motionary aspects of a running motor into a static non-rotating orthogonal model that can be monitored and manipulated using faster math and ignoring voltage before being inverse transformed back to the rotational realm and applied to the windings via the output stage of the drive.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[mikekilroy]

both replies required purple star.

http://www.KilroyWasHere<dot>com

 

[7anoter4]

There was many definitions of a vector.
The Classical Field Theory created physical vectors. For instance the electric field [intensity] in a point in space is E=grad(V).
The [electrical] potential V is a scalar which depends on its position in three-dimensional space.
Such vectors, arranged in a field of vectors in space may present function as divergence [scalar] and curl [vector] as field derivations.
Another definition of vector-phasor vector, or simply phasor-it represents a complex number-usually for current or voltage representation.
Since instantaneous value of current is i=sqrt(2)*I*cos(w*t+fi) [ where I it is the rms value and fi the angle for time=0] RE(I)=I*cos(fi) represents the actual value of current at time=0, divided by sqrt(2) . The imaginary part it is the virtual IM(I)=I*sin(fi) -minus for inductive load and plus for capacitive.
You may note is as I=I(cos(fi)+/-sin(fi)*i) and put it in a Cartesian two-dimension diagram. Here i=sqrt(-1) a non-existing entity. No gradient, divergence or curl is available here even no vectorial multiplication.
Now vector could be every thing: a matrix row or column, even a paper folder.
What is in a name?