The following examples are available:
Description
This example calculates the current that results from an AC voltage being applied to a thick stranded coil in free space. Scalar parameters for this analysis are:
n = 500 (coil turns)
r = 3*s/2 meters (the mean radius of the coil)
S = .02 (meters; the coil winding width and depth).
The following command listing demonstrates how to solve this problem using the current-technology element PLANE233. The electromagnetic elements represent the voltage forced coil and air. INFIN110 elements represent the far-field.
Note: The example analysis presented here is only one of many possible harmonic magnetic analyses. Not all such analyses follow exactly the same steps or perform those steps in the same sequence. The properties of the material or materials being analyzed and the conditions surrounding those materials determine which steps a specific analysis needs to include.
Below is the command input stream using current-technology element PLANE233. All text preceded by an exclamation point (!) is a comment.
/prep7 /title, Voltage-fed thick stranded coil in free space /com, Calculate the current in the coil from an applied AC voltage /com, /nopr et,1,233,,,1 ! air et,2,233,2,,1 ! stranded coil et,3,110,,,1 ! far-field mp,murx,1,1 mp,murx,2,1 ! *** Coil parameters s=.02 ! coil winding depth and width n=500 ! number of turns r=3*s/2 ! mean radius rho=3e-8 ! resistivity ! *** Derived coil parameters Sc=s**2 ! coil cros-sectional area Vc=2*acos(-1)*r*Sc ! coil volume Rcoil=rho*(n/Sc)**2*Vc ! coil resistance rectng,s,2*s,0,s/2 pcirc,0,6*s,0,90 pcirc,0,12*s,0,90 aovlap,all asel,s,area,,1 aatt,2,1,2 asum asel,s,area,,4 aatt,1,1,3 asel,all csys,1 lsel,s,loc,x,9*s lesize,all,,,1 esize,,8 mshape,0,2d ! mapped mesh with quads mshkey,1 amesh,1,4,3 ! mesh far-field and coil smrtsize,2 esize,s/4 mshape,1,2d ! specify triangle elements mshkey,0 ! free mesh amesh,5 ! mesh air region r,1,,Sc,n,r,1,Rcoil ! coil constants rmore,2 ! symmetry factor n1=node(s,0,0) ! get a node on the coil esel,s,mat,,2 ! get coil elements nsle,s cp,1,volt,all ! couple VOLT dof in coil cp,2,emf,all ! couple EMF dof in coil allsel,all csys,1 nsel,s,loc,x,12*s sf,all,inf ! set infinite surface flag csys,0 nsel,s,loc,x,0 d,all,az,0 ! flux-parallel condition allsel,all finish /solu antype,harm d,n1,volt,12 harfrq,60 ! 60 Hz. solve finish /post1 set,1 plf2d ! Plot real flux lines *get,ireal,node,n1,rf,amps set,1,1,,1 plf2d ! Plot imaginary flux lines *get,imag,node,n1,rf,amps *status ! Imaginary and real components of current finish
Another Ansys, Inc. publication, the Mechanical APDL Verification Manual, contains other examples of 2D harmonic magnetic analysis: