Wednesday, 22 August 2012
An Electrical machine is a device that converts mechanical energy to electrical energy or vice versa, and changes AC voltage from one level to another level.
Electrical machines are divided into three parts:
GENERATOR
A generator is the device that converts mechanical energy at its prime mover to produce constant electrical energy at its output. In more technical words, it is a dynamic electrical energy machine. Generator is classified into two types: AC generator and DC generator.
The basic requirements for a dynamically induced emf to exist are the following: (1) A steady magnetic field (2) A conductor capable of carrying current (3) The conductor to move in the magnetic field.
AC generator is the generator that converts mechanical energy at its prime mover into AC electricity.
AC generator is classified into several types:
Asynchronous AC generator or induction AC generator, an AC generator whose field current is supplied by magnetic induction into the field windings.
Synchronous AC generator, an AC generator whose magnetic field current is provided by a separate DC current source, either external DC source or mounted DC source.
DC generator is the generator that produces DC power i.e., constant power P=V*I by taking mechanical energy as input. Example of a DC generator is dynamo.
Motor is the device that converts electrical energy at its input to produce mechanical energy. Motor is classified into two types: AC motor and DC motor.
DC motor is the motor that converts DC electricity into mechanical energy. Its main components are stator, rotor, windings (field windings and armature windings) and commutator
Transformer
Transformer is the device that converts AC voltage from one level to another level higher or lower, or even to the same level without changing the frequency. It works based on the principle of mutual induction, so its power remains approximately constant, where as frequency also remains the same.
Electrical machines are divided into three parts:
GENERATOR
A generator is the device that converts mechanical energy at its prime mover to produce constant electrical energy at its output. In more technical words, it is a dynamic electrical energy machine. Generator is classified into two types: AC generator and DC generator.
The basic requirements for a dynamically induced emf to exist are the following: (1) A steady magnetic field (2) A conductor capable of carrying current (3) The conductor to move in the magnetic field.
AC generator is the generator that converts mechanical energy at its prime mover into AC electricity.
AC generator is classified into several types:
Asynchronous AC generator or induction AC generator, an AC generator whose field current is supplied by magnetic induction into the field windings.
Synchronous AC generator, an AC generator whose magnetic field current is provided by a separate DC current source, either external DC source or mounted DC source.
DC generator is the generator that produces DC power i.e., constant power P=V*I by taking mechanical energy as input. Example of a DC generator is dynamo.
Motor is the device that converts electrical energy at its input to produce mechanical energy. Motor is classified into two types: AC motor and DC motor.
DC motor is the motor that converts DC electricity into mechanical energy. Its main components are stator, rotor, windings (field windings and armature windings) and commutator
Transformer
Transformer is the device that converts AC voltage from one level to another level higher or lower, or even to the same level without changing the frequency. It works based on the principle of mutual induction, so its power remains approximately constant, where as frequency also remains the same.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment