Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
The analysis of singly excited magnetic system includes the derivations of expressions of electrical input energy, magnetically stored field energy and the mechanical force.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
In a magnetic system, a coil is wound over a magnetic material. By exciting this coil with a suitable electrical source, the energy can be stored or retrieved from a magnetic system.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
For any electromechanical energy conversion, there are two systems, electrical system and mechanical system. These systems are coupled through a coupling field which is mostly a magnetic one.
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
The laws of electromagnetism play an important role in the understanding of the various electromechanical energy conversion devices. These laws are stated by the scientist Faraday and Ampere. The laws are,
Equation | Electromechanical Energy Conversion
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
According to the principle of conservation of energy, the energy cannot be created or destroyed but it can be transformed from one form to another.
Concept of Electromechanical Energy Conversion with Diagram
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
Key Point : Thus the electromechanical energy conversion process involves the transfer of energy between electrical and mechanical systems, via the electric field or magnetic field.
Electrical Machines
Subject and UNIT: Electrical Machines: Unit I: b. Electromechanical Energy Conversion
Electrical Machines: Unit I: Electromechanical Energy Conversion : Syllabus, Contents
Magnetic Circuits and Electromagnetism | Electrical Machines
Subject and UNIT: Electrical Machines: Unit I: a. Magnetic Circuits and Electromagnetism
Electrical Machines: Unit I: Magnetic Circuits and Electromagnetism : Two Marks Questions with Answers
Subject and UNIT: Electrical Machines: Unit I: a. Magnetic Circuits and Electromagnetism
Key Point : The energy required to establish magnetic field then gets stored into it as a potential energy. This energy can be recovered when magnetic field established, collapses.
Subject and UNIT: Electrical Machines: Unit I: a. Magnetic Circuits and Electromagnetism
We have already mentioned that magnetic effects of electric current are very useful in analysing various practical applications like generators, motors etc. One of such important effects is force experienced by a current carrying conductor in a magnetic field.
Subject and UNIT: Electrical Machines: Unit I: a. Magnetic Circuits and Electromagnetism
If the flux produced by one coil is getting linked with another coil and due to change in this flux produced by first coil, there is induced e.m.f. in the second coil, then such an e.m.f. is called mutually induced e.m.f.
Subject and UNIT: Electrical Machines: Unit I: a. Magnetic Circuits and Electromagnetism
Hence according to Faraday's law, due to rate of change of flux linkages there will be induced e.m.f. in the coil. So without physically moving coil or flux there is induced e.m.f. in the coil. The phenomenon is called self induction.