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