Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
The radius of the circle is magnitude of induced e.m.f. E which remains same under variable load condition as the excitation provided to the alternator is maintained constant.
Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
If the field current of the alternator is varied to change the excitation e.m.f. E, the power angle δ chrnges m such a way as to maintain E sin 8 constant.
Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
With increase in δ, power increases and with decrease in 8, power decreases. Power in case of synchronous machine depends on the angle δ. This angle δ is called power angle.
Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
After proper synchronization of the alternators, they will run in synchronism. A synchronizing torque will be developed if any of the alternator drops out of synchronism and will bring it back to the synchronism.
Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
It consists of a rotating pointer which indicates the exact moment of closing the synchronizing switch.
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
The conditions to be satisfied for synchronization of three phase alternators are same as that for single phase alternators.
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
In case of alternators, synchronization is done generally by lamp methods. It can be done by two ways : a) Lamps dark method b) Lamps bright method.
Alternators
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
The current and power factor can be determined by excitation provided to its field and impedances of the generator and load.
Subject and UNIT: Electrical Machines II: UNIT I: c. Synchronization and Parallel Operation of Alternators Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT I : Synchronization and Parallel Operation of Alternators : Syllabus, Contents
Armature Reaction and Regulation of Alternators | Synchronous Generator | Electrical Machines
Subject and UNIT: Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT I : Armature Reaction and Regulation of Alternators : Anna University Questions with Answers (Long Answered Questions)
Armature Reaction and Regulation of Alternators | Electrical Machines
Subject and UNIT: Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators Engineering Electrical Machines - II
Engineering Electrical Machines - II : UNIT I : Armature Reaction and Regulation of Alternators : Anna University Two Marks Questions & Answers
Synchronous Generator or Alternators
Subject and UNIT: Electrical Machines II: UNIT I: b. Armature Reaction and Regulation of Alternators Engineering Electrical Machines - II
The comparison is as given below.