Electrical installations of electric light, power, traction and industrial electrical machinery (1902)
Kennedy, Rankin, d. 1917 · Edinburgh T.C. & E.C. Jack · leaf 203
ick wire coils. A permanent steel magnet, M, embraces the disc as shown, andwhen the disc rotates under the torque set up by the alternatingmagnet, currents are generated in the disc under the steel magnet.Thus, on one diameter the disc acts as a motor, and on the oppositediameter it acts as a… … Fig. 205 Principles of Meters Many meters depend on this principle, but the disc cannot alwaysbe used for the armature common to both motor and generator.It can only do so withalternating currents,whereby motor currentscan be induced in the disc.Continuous current re-quires a continuous cur-rent…
Electrical engineering · Electric power
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