Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 259
uth poles. But the best practice is to use an interpole for 242 ELECTRICAL MACHINERY each main pole, and this is adhered to in a large percentageof eases, especially on medium-sized and large motors. Interpoles are used on all three types of direct-curi-entmachines—scries, shunt and… … Fig. 2r.).—Four-pole interpole motor; one interpole for each main pole. Fig. 257 arc shown the connections for a tour-i>uk^ series motorwith interpoles, to be started from a manual-type starting box.These are the same as for tlic simpk^ type of machine. On theshunt-interpole type only four lends…
Electric machinery
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