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A magnetostatic 2 1/2- dimensional field calculation program for turbogenerators

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4 Author(s)
Renew, D. ; CEGB, Leatherhead, Surrey, England ; Blake, S. ; Jacobs, D.A.H. ; Rutter, P.

A finite difference program is described which calculates the magnetic field strength and flux density in a turbogenerator. The mathematical model incorporates solid or laminated iron components with non-linear permeabilities. The fields are evaluated in the r-z plane and vary periodically in the circumferential direction. The program is therefore well suited to three-dimensional end region problems. Use of the program shows how the leakage fields at the core back of a generator vary when radial cooling ducts are introduced. The importance of this for different duct configurations and generator operating voltage is evaluated.

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Magnetics, IEEE Transactions on  (Volume:19 ,  Issue: 6 )