seminars for eee

DC MACHINES AC MACHINES


ABSTRACT:
The electrical machines deals with the energy transfer either from mechanical to electrical or electrical to mechanical form. This process is called electro mechanical energy conversion. These electrical machines are designed for various applications because electrical energy is easily adaptable for all human needs and interests in an economic and efficient manner. At the same time electrical energy can be easily controlled and is pollution free at the consumer premises.
                        The different types involved in electrical machines is
                                         
                        (1) DC MACHINES
                                                                        (2) AC MACHINES

  DC MACHINE:

                         Depending up on these machines how the field winding is connected to the armature is divided into 3 types. They are (1) shunt (2) series (3) compound. Depending up on these types we shall see the various applications and how we should increase our living standards. These machines are also known as direct type machines.
  AC MACHINES
These are further classified as transformers, synchronous machines, inductions and ac commutator machines. Now we shall see the various applications and importance of these machines in detail. This machine is also known as alternating type machines.
Transformers are the very important devices in power system for stepping up and stepping down the voltage. Because at high voltage transmission is efficient for sending from generating end to receiving end
Now a days we are seeing that the extension range of computers, this is because of electrical machinery. With out electrical machinery a single computer will not work. So here we shall see what is the importance of electrical machinery depending up on various types and applications.