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Three‐dimensional analysis of inductances and magnetic fields in the air‐cored armature windings of a superconducting synchronous machine

“…Vector potentials produced by the armature winding can be derived in the same way a s we derived Eqs. (14) and (15) in the previous paper. More precisely, we designate the outer region of armature winding (Rsi 5 r 5 Ra) as region 1' and the inner region (Ra 5 r 5 0) as region 2'.…”