Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators
Armature Leakage Reactance
Synchronous Generator or Alternators
This leakage flux makes the armature winding inductive in nature. So winding possesses a leakage reactance, in addition to the resistance.
Armature Leakage Reactance
When
armature carries a current, it produces its own flux. Some part of this flux
completes its path through the air around the conductor itself. Such a flux is
called leakage flux. This is shown in the Fig. 2.4.1
Key Point : This
leakage flux makes the armature winding inductive in nature. So winding
possesses a leakage reactance, in addition to the resistance.
So
if 'L' is the leakage inductance of the armature winding per phase, then
leakage reactance per phase is given by XL = 2 π f L Ω /ph. The
value of leakage reactance is much higher than the armature resistance. Similar
to the d.c. machines, the value of armature resistance is very very small.
Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators : Tag: Engineering Electrical Machines - II : Synchronous Generator or Alternators - Armature Leakage Reactance
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Electrical Machines II
EE3405 Machine 2 EM 2 4th Semester EEE Dept | 2021 Regulation | 4th Semester EEE Dept 2021 Regulation