Function and classification of transformers
Before introducing switch mode power transformers, we first need to understand the concept of power transformers. Because the former is actually a device that adds a switch on top of the power transformer, its original purpose has not changed. But the functions of this new type of transformer are very different from those of ordinary transformers. In general, in circuits, this type of transformer not only has the practical function of converting voltage with ordinary transformers, but also has insulation isolation and corresponding power transmission functions. This type of transformer is generally used in switching power supplies for various high-frequency circuits. So what is the specific function of this product? What is its classification? Now let me introduce it to you.
For transformers, they are actually devices that can convert voltage. Usually we also call it a power transformer. However, the difference between a switching power transformer and other transformers is that it has an additional switching transistor compared to a regular transformer. In this way, a self-excited intermittent oscillator is formed, whose function is to adjust the input DC voltage into a high-frequency pulse voltage before outputting.
In addition to the above functions, this product also has a more important role, which is the transmission and conversion of energy. In a flyback circuit, when we conduct the switching transistor, the corresponding transformer converts electrical energy into a magnetic field and stores it for processing. When we disconnect the switch tube, on the contrary, the magnetic field will also be converted into electrical energy.
So how does it work in forward circuits? Firstly, when we conduct the switching transistor, the relevant input voltage will be used to directly supply the load, while also storing energy through inductance. Once we disconnect the switch tube, electrical energy will be transferred to the load through the energy storage inductor.
Finally, the switching power transformer can also convert the incoming DC voltage, thereby outputting various sizes of low voltage. We have finished discussing its function, so what is its classification?
Generally speaking
Switching power transformers can be classified into two different types: single excited and double excited. The structures of these two classifications are different, and their working principles are also vastly different. Single excitation mode can input unipolar pulses and also output forward and backward voltage; The difference between dual excitation and bipolar excitation is that the input pulse is bipolar, and the vast majority of them output bipolar pulse voltage.
Through the above text, many friends have gained a certain understanding of transformers. For switch mode power transformers, not only does it add a distinguishing feature of a power switch, but some of its applications have become even more widespread. In addition, for some specific applications, power transformers with this device can convert voltage as needed, achieving industrial effects that meet various types of voltage requirements.
