Subject and UNIT: Electrical Machines: Unit II: D.C. Generators
Such an induced e.m.f. which is due to physical movement of coil or conductor with respect to flux or movement of flux with respect to coil or conductor is called dynamically induced e.m.f.
D.C. Generators
Subject and UNIT: Electrical Machines: Unit II: D.C. Generators
The study of the electrical engineering, basically involves the analysis of the energy transfer from one form to another. An electrical machine, deals with the energy transfer either from mechanical to electrical form or from electrical to mechanical form. This process is called electromechanical energy conversion.
Subject and UNIT: Electrical Machines: Unit II: D.C. Generators
Electrical Machines: Unit II: D.C. Generators : Syllabus, Contents
Electromechanical Energy Conversion | Electrical Machines
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
Electrical Machines: Unit I: Electromechanical Energy Conversion : Two Marks Questions with Answers
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
In the field of electrical engineering, engineers, other professionals, workers in the plant and many users get exposed to electricity directly or indirectly during the generation, transportation, installation and usage of electricity.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
• In machines, there are two parts to which leakage fluxes are associated which are, i) Main poles and ii) Armature flux
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
It is seen that the m.m.f. wave produced by the single phase a.c. winding is pulsating, whose amplitude varies sinusoidally with time. This is because the current flowing in single phase a.c. winding is alternating in nature.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
It is seen that the armature winding used for three phase alternators is distributed in nature. The efforts are made to place the coils in all the slots available per pole per phase.
Winding Terminologies, Types
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
In a three phase alternators, three different sets of windings are arranged in the armature (stator) slots in such a way that there exists a phase difference of 120° between the induced e.m.f.s in them.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
The various advantages of field energy method are,
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
The charge in electric field is analogous to the flux linkages while the voltage is analogous to the current in a magnetic field.
with Solved Example Problems
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
For continuous energy conversion devices like Stator alternators, synchronous motors etc., multiply excited magnetic systems are used. In practice, doubly excited systems are very much in use.