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 205
hat of a 1-horse-power motor, about1,000 revolutions per minute; of a 5-horse-power motor, 900 revolutions perminute; a 15-horse-power motor, 750 revo-lutions ; a 120-horse-power motor, about550 revolutions and a 250-horse-powermotor, about 425 revolutions per minute. Small motors are usually… … 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-
Electric motors
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