What is the formula for dispersion coefficient? a) dispersion coefficient = magnetizing current / ideal short circuit current b) dispersion coefficient = magnetizing current * ideal short circuit current c) dispersion coefficient = magnetizing current + ideal short circuit current d) dispersion coefficient = magnetizing current – ideal short circuit current

# What is the formula for dispersion coefficient? a) dispersion coefficient = magnetizing current / ideal short circuit current b) dispersion coefficient = magnetizing current * ideal short circuit current c) dispersion coefficient = magnetizing current + ideal short circuit current d) dispersion coefficient = magnetizing current – ideal short circuit current

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a) dispersion coefficient = magnetizing current / ideal short circuit current

Answer: a

Explanation: First the magnetizing current is calculated. Next the ideal short circuit

current is calculated. The ratio of both gives the value of dispersion coefficient

dispersion coefficient = magnetizing current / ideal short circuit current

dispersion coefficient = magnetizing current / ideal short circuit current

a) dispersion coefficient = magnetizing current / ideal short circuit current

Explanation: First the magnetizing current is calculated. Next the ideal short circuit

current is calculated. The ratio of both gives the value of dispersion coefficient.

(a) dispersion coefficient = magnetizing current / ideal short circuit current

a) dispersion coefficient = magnetizing current / ideal short circuit current

dispersion coefficient = magnetizing current / ideal short circuit current

Answer: d

Explanation: For the calculation of dispersion coefficient, first the air gap length, effective

specific permeance is calculated. Next the pole pitch, window space factor and the

number of slots per pole per phase.

dispersion coefficient = 0.838 * 10

6 * 3.14 * air gap length * effective specific

permeance / pole pitch * (window space factor)

2 * number of slots per pole per

phase

a) true

This answer was edited.a) dispersion coefficient = magnetizing current / ideal short circuit current