Introduction of asynchronous generator
Hello friends, I hope all of you are doing great. In today’s tutorial, we are gonna have a look at the introduction to the Induction Generat...
Hello friends, I hope all of you are doing great. In today’s tutorial, we are gonna have a look at the introduction to the Induction Generator. A generator is such an instrument that converts any kind of energy into the electrical. As you know that energy can’t be produced it can converts from one form to another. The generator can convert many types of energy like mechanical, thermal, and P.E into the electrical. Mechanical energy is very common which is work on the generator to produce electricity. When the generator transforms a mechanical into electrical energy is also known as the dynamo.
Nowadays the generator is working in our every home, factories or industrial zone. Like they are working in different automobiles, in wind turbines or in an electrical generation system. In today’s post, we will have a look at the induction generator introduction, working construction, uses, or circuit. So, let’s get started with the Introduction to Induction Generator.
An asynchronous machine is composed of two main parts, the stator and the rotor. There are also other accompanying accessories including: machine cover, ball bearing, shaft, pole oil box, blower, fan box, etc.
Stator (quiet part)
The stator is composed of the main parts including the steel core, the winding and the auxiliary part with the case and cover. Inside:
The cylindrical steel core is responsible for magnetic conduction, made from electrical engineering steel sheets. These steel sheets are grooved inside and then reassembled into pressing grooves on the inside of the case. The steel sheets are coated with insulating paint to prevent corrosion and rust.
The winding is made of pure copper with insulation, placed inside the grooves of the steel core to allow alternating current to pass and create a rotating magnetic field.
The housing is made of strong, sturdy aluminum or cast iron to help fix the machine and the steel core.
Roto (rotating part)
The rotor is composed of main parts such as steel core, winding wire and machine shaft.
The rotor core consists of electrotechnical steel sheets taken from the inner part of the stator core. The outer surface of the rotor steel core is grooved to place the winding wire and the center is punched so that the shaft can be installed.
The shaft of the asynchronous generator is made of stainless steel, with a steel rotor core.
The windings of the asynchronous generator model have two types: squirrel cage rotor (short circuit rotor) and winding rotor. As follows:
Squirrel cage rotor: there are copper or aluminum rods placed in the groove so that they are short-circuited by two short-circuit rims at both ends. For machines with small engines, people often cast a whole block of busbars and fins. , cooling fan and short circuit of the rotor winding.
Wound rotor: Has the same windings as the stator windings and has the same number of magnetic poles. Windings of this type are always star-connected with the three outputs connected to the three slip rings. The rotor winding will be attached to the rotor shaft and insulated from the shaft.
Working principle of asynchronous generator
How does a generator work? To understand how the generator works, please follow the working principle of the machine below.
Connect the stator winding to the home grid then use the primary motor to pull the rotor to rotate at a speed n (n > n1 and in the same direction as n1). At this time, the direction of the magnetic field sweeping through the rotor guides will be reversed. The electromotive force and rotor current are opposite to the direction of the motor.
The direction of the solenoid applied to the rotor is opposite to the direction of rotation of the rotor. At this time, the braking torque is generated to help balance with the driving torque of the primary motor. Then the asynchronous machine will work more stably in the mode of a generator.
Thanks to the rotating magnetic fields of the mains, the mechanical energy of the primary motor in the rotor is converted into electrical energy in the stator. To create a rotating magnetic field, the grid must provide the machine with a level of reactive power that helps to resist other forces.
When an asynchronous machine works without power to the stator winding, one must excitation for the machine. This is the biggest drawback of this type of asynchronous generator. This is also the reason that it is rarely used as a generator in industries.
Note: The reverse process of an asynchronous generator is an Inductive magnetic motor. And their combination in Ether creates free energy. This is something that the technical books do not mention. Because it's related to free energy
- by Self-powered Flywheel Generator For Induction Motors - Free Energy with 3 combined Ether vortices
Applications of asynchronous machines
Asynchronous generators are rarely used in daily life, because the working characteristics of the machine are not good. However, as an asynchronous motor, it is used a lot. It is made quite simply, low cost, easy to operate, high working efficiency and very durable with almost no maintenance required. Therefore, the asynchronous motor brings consumers high reliability and is widely used.
