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 431
he torque. ^^•This is accomplished by means of a magnetic brake which consists of an aluminum disk fixed on thearmature shaft and rotating between the jaws of a permanentmagnet. When a conductor is moved across a magnetic field, ane. m. f. is generated in it which is proportional to the resistance… … !. Eddy Currents Induced in a Disk,Rotating in a Magnetic Field 391 94 ELECTRICAL MEASUREMENTS be understood from Fig. 88. The direction of the magnetic fluxproduced by the permanent magnet is downward from N to S,cutting the disk which rotates in the direction shown by the arrowA. This causes…
Electrical engineering
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