A four pole, 20 kw, 400 v, wave-wound shunt motor has 380 armature conductors. The commutator has a total of 150 segments. The full load efficiency of the motor is 85% and its shunt field resistance is 125Ω. If the brushes are shifted backwards through two segments, determine the following:
a) The total armature ampere-turns per pole.
b) The demagnetising ampere turns per pole.
c) The cross-magnetizing ampere-turns per pole.
12 окт 2024
