Hi guys, today I am going to introduce something about transformers. So, transformer is a static device which transfers electrical energy from one electrical circuit to another electrical circuit without changing frequency and magnitude of power. So, without changing frequency means Transformer is a constant frequency device.
Constant frequency device. In case of transformer, frequency is constant. And without changing the magnitude of power. Power magnitude will also will not change in case of transformer. So, that is the reason why transformer is called constant power device.
Okay, so transformer is an electromagnetic energy conversion device. Externally, it is not an energy conversion device. Externally, transformer is not an energy conversion device. But internally, it is an energy conversion device.
So, internally what happens is the electrical energy is converted into magnetic energy and again the magnetic energy is converted into electrical energy. Okay, let us consider a basic structure of transformer. Okay, so let us say this is the magnetic core of the transformer, magnetic core of the transformer and to which The windings are wounded like this. Windings are wounded like this.
Okay. So to which a source is connected. A source is connected. Generally a winding which is connected to source is called primary winding.
A winding connected to source. Connected to source is primary winding. And let us consider another winding like this. So to this winding we are connecting some load. Okay.
We are connecting some load. Okay. A winding which is connected to load is secondary winding.
A winding which is connected to load is secondary winding. Okay. So whenever.
Voltage is flowing through this conductor. What happens is flux will produces. Flux will produces. And that produced flux links with the secondary winding.
This is the flux. And this one is the magnetic core. magnetic core of the transformer.
Okay. And one more thing is transformer is a phase shifting device. Transformer is a phase shifting device.
So, between input and output, between input and output, the phase shift is 180 degrees. 180 degrees. 180 degrees phase shift in the sense, let us say, this is the Input to the transformer, this is V1, then the output V1 is EMF inducer E1, the output is at an angle of 180 degrees to the input.
So, transformer is a phase shifting device, whereas in case of transistor, In case of transistor also Transistor also, the phase difference between input and output is 180 degrees. The phase difference between input and output is 180 degrees. Okay.
In case of transistor also, the same thing. And one more thing is transformer is a singly excited device. Singly excited device. See here.
To excite the transformer, a single source is required. Multiple sources are not required to excite the transformer. A single source is enough. So, that is the reason why transformer is called a singly excited device. And one more thing is that transformer is a constant flux device.
Constant flux device. I will explain all these things clearly in the next videos. Now what I am doing is just I am introducing what is transformer, what are the specialties with the transformer. And transformer is a constant flux device.
Flux is constant. Why? Because flux depends on magnetic flux density and cross sectional area. Flux depends on magnetic flux density and cross sectional area. Basically magnetic flux density depends on material.
Depends on material what we are using and cross sectional area we cannot change the cross sectional area. After once we put it into operation we cannot change the cross sectional area. So the material is constant the cross sectional area of core is constant.
So transformer is a constant. flux device transformer is a constant flux device okay so this is about the transformer thank you