Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators

Armature Leakage Reactance

Synchronous Generator or Alternators

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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 X_L = 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

Home | Department: EEE Department | Subject: Electrical Machines II |

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Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators

Armature Reaction and Regulation of Alternators

Introduction - Synchronous Generator or Alternators

Armature Resistance - Star, Delta | Synchronous Generator or Alternators

Armature Leakage Reactance - Synchronous Generator or Alternators

Armature Reaction - Synchronous Generator or Alternators

Concept of Synchronous Reactance and Impedance - Synchronous Generator or Alternators

Equivalent Circuit of an Alternator

Voltage Equation of an Alternator

Phasor Diagram of a Loaded Alternator

Voltage Regulation of an Alternator

Methods of Determining the Regulation - Synchronous Generator or Alternators

Synchronous Impedance Method or E.M.F. Method - Alternators

Short Circuit Ratio and Its Significance - Synchronous Generator or Alternators

Significance of SCR - Synchronous Generator or Alternators

M.M.F. Method of Determining Regulation - Synchronous Generator or Alternators

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