Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 111
riction; and (2) the torque required toovercome the damping action of the magnets on the akiminum disk.The first part of the torque may be taken to be approximately con-stant, while the second part is accurately proportional to the speed.Therefore, an arrangement for exerting on the armature a… … Fig. 90. General View of Thomson W^att-Hour Meter coil, called a siartincj coil, connected in the armature circuit. So long as the electromotive force between the mains does not vary, the current in the starting coil is constant and it, therefore, exerts a constant torque upon the armature. If,…
Electrical engineering
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