PARTS OF A DYNAMO-ELECTRIC MACHINE 



31 



these large multipolar machines are being replaced by 

 machines of 2 or 4 poles. Figs. 7 and 8 show the com- 

 parative sizes of two machines of about the same capacity. 



FIG. 8. Alternator for Reciprocating Engine Drive. General Electric 



Company. 



It is seen that the high speed turbo-generator (one designed 

 for turbine drive) is much smaller and more compact than 

 the older slow speed machine. 



