AC generators are electric generators that convert/change mechanical energy to electrical energy in an alternating EMF or alternating current. In AC generators the supply of input is a mechanical energy switch supplied through combustion engines, gas turbines, and steam turbines.
What is the principle of AC generator Class 12?
AC generators work on the principle of Faraday’s law of electromagnetic induction, which states that electromotive force – EMF or voltage – is generated in a current-carrying conductor that cuts a uniform magnetic field.
What is AC generator?
An alternating current (ac) generator is a device that produces a potential difference . A simple ac generator consists of a coil of wire rotating in a magnetic field. Cars use a type of ac generator called an alternator to keep the battery charged and to run the electrical system while the engine is working.
What is the equation of AC generator?
Emf induced in an AC generator If the coil of N turn and area A is rotated at v revolutions per second in a uniform magnetic field B, then the motional emf produced is e = NBA(2πv)sin(2πv)t, where we assume that at time t = 0 s, the coil is perpendicular to the field.
What are the types of AC generator?
There are two types of AC generators and they are: Induction generators. Synchronous generators.
What are the uses of AC generator?
Bicycles, electric scooters, microwaves, and sailboats all use the AC generator to produce AC current. Mechanical energy is provided by steam and gas turbines as well as internal combustion engines to the AC generators.
What are the three main components of the AC generator?
- Stationary field rotating armature.
- Rotating field stationary armature.
What is AC generation process?
Turbine-based AC electrical generation is when an electric current is induced by the interaction between charged particles and magnetic fields which converts the kinetic energy of the turbine into the kinetic energy of electrons.
How AC current is generated?
An alternating current is produced by switching the potential between two terminals in a fixed time interval—the frequency. The difference in potential between the positive and negative terminal is expressed in volts.
What is the principle of AC and DC generator?
Both DC and AC generators convert mechanical power to electrical power. A DC generator produces direct power, while an AC generator produces alternating power. Both of these generators produce electrical power based on the principle of Faraday’s law of electromagnetic induction.
What are the 2 types of generator?
There are two fundamental types of generators known as AC (alternating current) and DC (direct current) generators. While the technique of producing electricity is the same in both types, AC and DC power become different in terms of their applications – the way in which loads receive electric power.
What are the two main parts of AC generator?
All generators must have two mechanical parts that are – a stator and a rotor. For the relative motion to take place between the magnetic field and the conductor. A Rotor is that part which rotates.
How does A 3 phase AC generator work?
A three-phase AC generator is designed to produce three-phase AC power by building more coils in the stator around the rotor. The three coils are equally spaced 120° apart around the inside of the stator. The armature coils are wired so that the generator has three separate output voltages that differ in phase by 1200.
What are the advantages of AC generator?
Advantages of ac generators : AC is very easy and efficient to transmit over a long distance rather than DC. The design of the AC generator is fairly simpler than DC generator type. No need for matching a voltage. Cost of ownership is lower.
What is AC generator with diagram?
When the coil is rotated within an electric field, all of the electrons within the wire start to move in one direction and form a current. As the coil of wire spins, it moves across the electric field first in one direction and then in another, which changes the direction of the flow of electrons.
What is the efficiency of AC generator?
Efficiency of an AC generator is the ratio of the useful power output to the total power input. Because any mechanical process experiences some losses, no AC generators can be 100 percent efficient. Efficiency of an AC generator can be calculated using Equation (10-3).
What is the conclusion of AC generator?
Conclusion. AC generators do not generate electricity; rather, it is responsible for converting mechanical energy into alternating electrical energy.
What are the applications of DC & AC generator?
Basic Uses & Design Typically, AC generators power home electrical appliances and small motors such as juicers, vacuum cleaners, and food mixers. However, DC generators are used to power large electric motors such as those used in subway systems.
What are the losses of AC generator?
Rotational or mechanical losses can be caused by bearing friction, brush friction on the commutator, and air friction (called windage), which is caused by the air turbulence due to armature rotation. Careful maintenance can be instrumental in keeping bearing friction to a minimum.
Which magnet is used in AC generator?
Working principle of AC generator with linear motion (translation) also apply the principle of Faraday that is using magnetic induction which change iron magnet to produce magnetic flux. Magnetic flux is captured by the stator to be converted into electrical energy.
Why magnet is used in AC generator?
Inside an AC generator, a magnet creates a magnetic field between the north and south pole. When the rotor moves between the north and south pole of the magnet, the electrons in the coil begin to flow.
Why slip ring is used in AC generator?
The function of slip ring in an AC generator is that these are the hollow rings that are connected to the ends of the armature coil. They help in rotation of the coil. Also, they provide electric contact with the brushes.
What is the frequency of the AC generator?
The electrical output of the generator provides a variable-frequency supply with the frequency related to the speed of the gas turbine, typically in the range 320–800 Hz.
What is the principle of AC motor?
An AC motor works on the principle of electromagnetic induction. Based on the operation principle, they are classified into two types as synchronous motors and induction motors.
How is AC converted to DC?
After Stepping down of voltage, AC is converted to DC using rectifiers. A full bridge rectifier can be used to convert AC to DC. In this device, 4 diodes are used which operates in forwarding bias and not in reverse bias.