No item in cart
Basics of Electrical Machines
Real Life Application
In this topic, Basics of Electrical Machines, the Principles of Electromechanical Energy Conversion Devices and the Relations between Electric field and Magnetic field are explained whose real life applications are immense. For example, all the DC Machines and the AC Machines are derived from these theories and are being used in possibly every field of technology.
To understand all the Electrical Machines with clarity it’s important to have basic idea of Electric Field, Magnetic Field, and the Relation between Electric Current and Magnetic Field and a very brief idea of Electromechanical Energy Conversion Principles.
Electromechanical Energy Conversion Principles in layman terms is nothing but the interaction between Electrical System and Mechanical System. Electrical Energy cannot be directly converted to Mechanical Energy and vice-versa. A medium is needed in between these two systems which is known as Coupling Field. Now, this Coupling Field can be either Electric Field or Magnetic Field. The function of this field is to convert energy, for example electrical energy to mechanical energy in case of Motors and vice-versa in Generators. In Electrical machines, the coupling field which is preferred is the Magnetic Field because it can store more energy and produce more force compared to Electric Field. A classic example of Electromechanical Energy Conversion Device with Magnetic Field is a Relay.
Electric Field is said to be present around a body which is positively or negatively charged, while Magnetic Field is said to be produced due to moving charges like electrons moving in a conductor in one direction (Electric Current).
Relations between Electric Current and Magnetic Field:
1. A steady current produces a steady magnetic field.(Given by Hans Orsted in 1819)
2. A steady magnetic field cannot produce a current. (Failed experiment of Michael Faraday).
3. A steady magnetic field can produce current in a moving conductor loop. (Michael Faraday).
4. A changing magnetic field can produce current in a steady conductor loop. (Michael Faraday).
5. A current carrying conductor will experience force when it is present in a steady magnetic field. (Michael Faraday).
The above relationships led to establishment of the most important laws of Electrical Engineering namely Ampere’s Law, Biot-Savart’s law, Faraday’s Law.
THE GATE Academy questions covered a wide variety of topics and were similar to GATE paper standard. The online platform replicated the actual GATE test environment and the detailed and video solutions were sufficient to clear all doubts regarding the question. Thanks to THE GATE Academy team to provide such wonderful tests & platform.
To begin with, it gives me immense pleasure to Thank,Thank the institute THE GATE ACADEMY for all their help and support.Its a place to learn, explore, grow and succeed.Well it helps you brush-up your engineering knowledge and learn new things and clears your concept in such great details
E Lectures helped me a lot in making a head start in the right direction. It helped whenever I got stuck in any topic. Mock Tests across 50 centers helped me judge my progress both on individual and comparative basis.
I am Praveen. I got AIR 1 in Instrumentation stream. I want to dedicate this to my parents and to the Gate Academy faculty. Gate Academy coaching helped me tremendously to update myself continuously.I was very impressed with the way they taught each topic in different sessions with separate material for each session.
I took up mechanical coaching at THE GATE ACADEMY as there is no separate coaching for Engineering Sciences in India and Mechanical and Engineering sciences have more or less common topics.I feared that cracking GATE would be very difficult because I started my preparations very late but the counsellors and teachers guided me
In one year’s time, I was able to prepare for GATE exam with the help of THE GATE ACADEMY and faculties. GATE Focused study materials and online mock tests helped me know my strengthen & weakness to prepare accordingly. I wish all the best to all GATE aspirants and suggest them to go through GATE coaching in case the basics are not clear.
GATE Success Story
- Our students get all India rank 1, 1, 1, 1, 4 and 4
- More than 142 students in top 100.