ALTERNATOR REGULATION AND OPERATION 



133 



shown in (c) and in (6). The current flows in this coil in such a 

 direction that its magnetomotive force acts downward, as shown 

 in (6). The effect on the main magnetic circuit of the current 

 flowing in this coil is shown in Fig. 136 (c). The flux is inor 

 on the right-hand side of each pole and decreased on the left-hand 

 side. Were there no effect of saturation, the total flux would 

 not be changed, as the increase on one side of the pole would be 

 balanced by the decrease on the other side. 



(a) No Load 



i "nity PowiM--f:irf..r I 

 ril.ution in t)n> .iii-mip of a snliont-polo :ilt.-r-- 



.ows the no-lo:td flux distribul ion of 

 tor. 'I'h- dist i-ibuiion i- >\ niinct ric;il about a \crlicalaxis. I'ILI- 

 ure 13 the flux as affected by the single mil oi 



i. Althmigh tlie total area under i he flux wave is prac- 

 tically unehai. \\ p.-akrd on one -ide and de- 



pressed on the oi her. Thi- OOeon also in direct -current \\\:\< 



