The electric motor and the transmission of power (1906)
Houston, Edwin J. (Edwin James), 1847-1914, Kennelly, Arthur E. (Arthur Edwin), 1861-1939, joint author · New York : McGraw Pub. Co. · leaf 206
FlG. 51.—QUADRTPOLAR MOTOR. struct motors Avith four or more poles,quadripolar motors being common be-tween 20-HP and 500-HP. 198 THE ELECTRIC MOTOR AND A form of quadripolar motor is shownin Fig. 51. Here tliere are four magnets,M, M, M, M, and, consequently, four mag- … FlG. 52.—QUADKIPOLAPv MoTOIi. netic circuits tlirougli the armature.There are also four sets of brushes, insteadof two, as in bipolar machines, but oppo- THE TRA:r^SMISSIO]S OF POWER. 199 site sets of brushes are connected too;etlierelectrical!), thus making a single pair ofmain terminals. Another…
Electric motors
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