What is the difference between a switching power supply and a transformer
Before introducing switching power transformers, we first need to understand the concept of power transformers. Because the former is actually a device that adds a switch tube to the power transformer, its original use has not changed. However, 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 from ordinary transformers, but also has insulation isolation and corresponding power transmission functions. This type of transformer is generally used on switching power supplies of various high-frequency circuits. So what is the specific function of this product? What is its classification? Now let the editor introduce it to you.
For transformers, they are actually a device 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 switch 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 switch, 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 a forward circuit? Firstly, when we perform conduction processing on the switch tube, 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 transmitted to the load through the energy storage inductor.
Finally, the switching power transformer can also convert the DC voltage transmitted in, thereby outputting various sizes of low voltage. We have finished discussing its function, so what is its classification?
Generally speaking, there are two different categories of switching power transformers, namely single excitation and double excitation. The structures of these two classifications are different, and their working principles are also vastly different. The single excitation type can input unipolar pulses and also output forward and backward voltage; The difference between the dual excitation type and the input bipolar pulse is that the vast majority of them output bipolar pulse voltage.
Through the above text, many friends have gained a certain understanding of transformers. For switching power transformers, not only does it add a distinction between power switches, but some of their applications are even more extensive. In addition, for some specific applications, power transformers with this device can convert voltage according to needs, achieving the industrial effect of meeting multiple types of voltage requirements.
