By D.A. Lowther, P.P. Silvester
Computer-aided layout has come of age within the magnetic units undefined. From its early beginnings within the Nineteen Sixties, whilst the precision wishes of the experimental physics neighborhood first created a necessity for computational aids to magnet layout, CAD software program has grown to occupy an immense spot within the business designer's instrument equipment. a variety of advertisement CAD structures are actually on hand for magnetics paintings, and lots of extra software program programs are used in-house by means of huge commercial corporations. whereas their features differ, these types of software program platforms proportion a really sizeable universal middle of either technique and objec tives. the current want, rather in medium-sized and nonspecialist agencies, is for an realizing of the way to make potent use of those new and immensely strong instruments: what approximations are inherent within the tools, what amounts should be calculated, and the way to narrate the com puted effects to the wishes of the dressmaker. those new research thoughts profoundly have an effect on the designer's method of difficulties, because the analytic instruments to be had exert a powerful impression at the conceptual versions humans construct, and those in flip dictate the style during which they formulate prob lems. The impression of CAD is simply commencing to be felt industrially, and the authors think this is often an early, yet no longer too early, time to assemble jointly a number of the event which has now accrued between commercial and learn clients of magnetics research systems.
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Extra info for Computer-Aided Design in Magnetics
In many practical cases, such an auxiliary problem can in fact be framed to have an analytic solution. Let the magnetic field of this auxiliary solution be denoted by Ha. Since the sources are the same in both problems, curl Ha = J. (66) The Potential Equations of Magnetics 54 But H . ::.. Ha, the difference between the magnetic fields in the real problem and the auxiliary problem, is an irrotational vector everywhere: curl (H - Ha) = o. (67) Clearly, this field can be given a representation in terms of a scalar potential, H - Ha = - grad Qr.
Three conductors embedded in dielectric and placed within a conductive sheath or housing form a cable. A common requirement is to evaluate the cable capacitance per unit length, for which in tum it is n~cessary to know the spatial distribution of the electric potential V within the dielectric. Since there are no distributed charges in the dielectric material, the potential satisfies a simplified version of (45), (46) known as Laplace's equation. The boundary conditions are quite simple in this case.
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Computer-Aided Design in Magnetics by D.A. Lowther, P.P. Silvester
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