A 6-pole alternator with 36 slots carries a 2-phase distributed winding. Each coil is short pitched by one slot. The winding factor is given by
A. cot15°/3√2
B. cot15°/4
C. cot15°/2√2
D. cot15°/4
Answer:A
A 6-pole alternator with 36 slots carries a 2-phase distributed winding. Each coil is short pitched by one slot. The winding factor is given by
A. cot15°/3√2 B. cot15°/4 C. cot15°/2√2 D. cot15°/4
Explanation: Slots per pole =36/6=6, q=6/2=3 ⇒ γ=180°/6=30°, coil is short pitched by one slot ⇒ ε=γ=30° and Kp=cosε/2=cos15° and Kd=sin(γq/2)/q(sinγ/2)=sin45/(3sin15)