The speed rpm and the coil span electrical

Solved Step by Step With Explanation- Alternator Parameters Calculations

Questions

ii). The distribution factor

iii). The pitch factor

Solved Step by Step With Explanation- Alternator Parameters Calculations

Answer

P = Number of poles

N = Speed in RPM

ii) Distribution Factor (Kd):

The distribution factor (Kd) accounts for the fact that the winding in the alternator is not fully distributed. It quantifies the effect of the distribution of coils within the stator slots. The formula to calculate Kd is:

Q = Number of conductors per slot

In this case, P is 16 (number of poles) and Q is 10 (conductors per slot). We calculate β as follows:

Kd ≈ 0.989

So, the distribution factor (Kd) is approximately 0.989. This factor quantifies the non-uniform distribution of winding in the stator slots.

C = Coil span in electrical degrees

P = Number of poles

So, the pitch factor (Kp) is approximately 0. This indicates that the winding arrangement has no effect on the alternator's performance.

iv) Phase EMF (Eph):

Z = Total number of conductors

In this case, Φ is 0.04 Wb, Kd is approximately 0.989, Kp is approximately 0, and Z is 1440 conductors.

v) Line EMF (Eline):

The line EMF (Eline) represents the voltage between two phases of the alternator. It is calculated as the square root of 3 times the phase EMF (Eph):

So, the line EMF (Eline) is also 0 V, indicating that there is no voltage between two phases of the alternator.

Thus,

v) Line EMF: 0 V (voltage between two phases)