THE DYNAMO. 



47 



the use of an adjustable low resistance shunt B, connected between 

 the terminals of the field winding as shown in Figs. 27 and 68. 



Fig. 26 shows the arrangement of a series generator without 

 regulating field shunt, and Fig. 27 shows the conventional dia- 



armature 



gram of connections of a series generator, including the regulat- 

 ing field shunt above mentioned. 



The compound generator. The winding on the field magnet of 

 a direct-current generator is frequently in two parts, one part 

 consisting of many turns of fine wire, the other part consisting of 

 relatively few turns of heavy wire. In this case the fine wire 



field, rheostat 



t receiving circuit ^ 



Fig. 28. 



winding is connected directly to the brus-hes, or to the terminals 

 of the machine, and the coarse wire winding is connected in series 

 with the outside receiving circuit. This method of field excitation 



