A further 90Ad will make poles 2 and 4 zero and poles 1 and 3 maximum, but with reversed polarity, pole 3 now being N. At this stage the compass will have rotated through 180Ad. The next 90Ad will reverse the polarity of coils 2 and 4, bringing theanbsp;...
|Title||:||A.C. Motors of Fractional Horse-power|
|Author||:||H. H. Jones|