Explanation: The odd harmonics of the order 5,7,11,13 etc are called belt harmonics. 9. Machine A has 60° phase spread and machine B has 120° phase spread. Both the machines have uniformly distributed winding. The ratio of distribution factors of machine A to machine B is ____________
A. 0.866
B. 1.1
C. 1.55
D. 1.155
Answer:A
Explanation: The odd harmonics of the order 5,7,11,13 etc are called belt harmonics. 9. Machine A has 60° phase spread and machine B has 120° phase spread. Both the machines have uniformly distributed winding. The ratio of distribution factors of machine A to machine B is ____________
A. 0.866 B. 1.1 C. 1.55 D. 1.155
Explanation: kdA=(sinσ/2)/σ/2, σ=60° ⇒ kdA=0.9556