Working principle of electronic transformer

Electronic transformers are mainly composed of a high-frequency transformer core (iron core) and two or more coils. They do not change their positions and convert AC power from one or more electrical circuits into AC voltage and current through electromagnetic induction. They play the role of boosting, reducing, isolating, rectifying, frequency conversion, phase reversing, impedance matching, inversion, energy storage, filtering, etc. in electronic circuits. 2. Working principle of electronic transformers - composition

A simple transformer consists of a closed magnetic conductor and two windings, one of which is connected to the AC power supply and is called the primary winding.

The other winding can be connected to the load and is called the secondary winding Ns. If the primary winding is connected to the power supply of the AC voltage Ui

When the transformer is connected, it is no-load and an alternating power source Io is generated in the primary winding. Io is called the no-load current.

3. Working principle of electronic transformer

An electronic transformer is an unregulated switching power supply, which is actually an inverter. First, it rectifies the AC power into DC power.

Then use electronic components to form a high-frequency oscillator to convert DC into high-frequency AC, and output the required AC through a switching transformer.

The voltage is then rectified for use by electrical appliances. Switching power supplies have the advantages of small size, light weight, and low price, so they are widely used.

In various electrical appliances, according to the different driving methods of high-frequency switching tubes, they can be divided into self-excited oscillation type and externally excited type.

4. Working principle of electronic transformer - application

Electronic transformers are widely used in traditional lighting fixtures, such as fluorescent lamps, desk lamps, energy-saving lamps, advertising lamps, etc.

Electronic transformers can be used, and after adopting electronic transformers, the starter can be omitted. In LED lighting, new products are also widely used.

Electronic transformers are used. The main reason is that electronic transformers have high efficiency, low cost, save iron and copper materials, and have a good structure.

Small and light, but its disadvantage is that its withstand voltage and high current impact resistance are worse than those of iron transformers.