Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 113
he car. SeePoints, Electrical Operation of. Polar Angle. See Polar Face. Polar Are. See Pole Arc. Polar Curve. See Curve. Polar Extension. See Pole Tips. Polar Face, that face of a magnet fromwhich the magnetic flux emerges into theair gap. Under certain conditions of load the cur-rents in… … Polar Face the magnet. The angle subtended at thecentre of the armature or rotor by the polarface is known as the polar angle (see AngleOF Polar Span), and the length of arc oc-cupied by the pole face is called the pole arc(a in fig.). The space between one polar faceand the adjacent one is known…
Electrical engineering
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