Answer / mani

we can not generat 4 phse , 5 phse because of phase angle .
if we generat 4 phase we can not make same pahse angle
betwen the phase that is why.

ex.for 3 phase, phase angle diff. ab=120,bc=120, ca=120.

for 4 phse (abcd ) ab=90, bc=90,cd=90,ad=90 but
ac=180,ad ,bd also like that that is why we cnat generat 4
phase and some other else.......

Answer / sarkar

we cant genrate 4 or 5 phase supply as genration of 3 phase is convinient

Answer / sathish charles.s

we cant generate 4phase or 5 phase because there equal
displacement b/w the each phase of 120,like R Y B...
phasse angle b/w R-Y,Y-B,B-R=120,

If suppose there is 4 phase then it will be like A B C D,A-
B=90,B-C=90,C-D=90,D-A=90,a-c=180,,,etc phase will create
problem,so we cant generate 4,5 phase....


But i have doubt y cant we generate 2 phase

Answer / hossam samir

winging is always constructed in 360 degrees angle. 3 phase
winding is built after 120 degree angle. If a 2 phase phase
wingind is designed, it is 2 , 180 degree angles winding,
which is exectly same as 2 coils in series. Similarly, 4
phase has same effects, a pair of 2phase winding.

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