Dynamos and motors; a text book for colleges and technical schools (1911)
Franklin, William S. (William Suddards), 1863-1930, Esty, William, 1868-1928 · New York The Macmillan company · leaf 282
{a) The use of a fly-wheelloosely attached to the synchronous motor shaft so as to slip as THE SYNCHRONOUS MOTOR. 271 the speed of the synchronous motor increases and decreases. Thisdevice sometimes takes the form of a hollow fly-wheel rigidlyfixed to the motor shaft and filled with liquid, and {b)… … Fig. 197. Figure 197 shows the field magnet of a synchronous motor,or rotary converter, the pole faces of which are provided withcopper damping frames or grids. This arrangement is seldomused on belted synchronous motors, it is however very frequentlyused on rotary converters and upon synchronous…
Dynamos · Electric motors
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