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 269
nchronous motor. Another form of damper which has been found very effectiveis called the squirrel-cage damper. Heavy bars of copper areplaced in slots at the surface of the poles and their ends bolted to twoclosed copper rings,so as to short-circuit all the bars. This cage-damper applied to a rotor… … 236 ALTERNATING-CURRENT MACHINERY 225 field sets up induced currents in the short-circuited frames or bars ofthe damper, and these currents react on the magnetic field so as tooppose the shifting of the flux and thereby dampen the hunting oscil-lations. The electrical effect of the dampers is…
Electrical engineering
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