In many electronic application scenarios, people will use step-up transformers, but you may not necessarily know the working principle of step-up transformers, so it is very troublesome to choose.
1. The working principle of the step-up transformer is that when there is an alternating current in the primary coil, an alternating magnetic flux is generated in the iron core (or magnetic core), so that a voltage (or current) is induced in the secondary coil. The transformer consists of an iron core (or magnetic core) and a coil. The coil has two or more windings. The winding connected to the power supply is called the primary coil, and the other windings are called secondary coils. In a generator, no matter whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, electromotive force can be induced in the coil. In both cases, the value of the magnetic flux is unchanged, but the amount of magnetic flux that intersects the coil is different. Change, this is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current and impedance.

2. According to the principle of electromagnetic induction, when a conductive object is in a changing magnetic field, a current can be induced in the conductive body. When the transformer is connected to the AC grid, the current is input to the primary coil of the transformer, and a magnetic field is generated around the transformer. As the current direction of the input alternating current is constantly changing, a magnetic field that changes synchronously with the current will be generated, and the generated magnetic field will form a closed loop along the iron core of the transformer. As the magnitude and direction of the magnetic field are constantly changing, a current is induced in the secondary coil. Because the voltage across each turn of the coil is equal, the more turns of the secondary coil, the higher the voltage output from the secondary coil.

3. The working principle of the step-up transformer is based on the principle of electromagnetic induction. The transformer has two sets of coils, the primary coil and the secondary coil. The secondary coil is outside the primary coil. When the primary coil is connected to alternating current, the transformer core generates an alternating magnetic field, and the secondary coil generates an induced electromotive force. The turns of the transformer coil The ratio of numbers is equal to the ratio of voltages.

4. Both step-up transformers and step-down transformers work on the same principle: electromagnetic conversion. When an AC voltage is applied to the primary winding through an AC current, an alternating magnetic field will be induced (transformers are usually made of a high-permeability material with an iron core to provide a magnetic circuit), and the alternating magnetic field will induce a voltage in the secondary winding. By adjusting the number of turns of the primary winding and the secondary winding, different voltage ratios can be obtained, that is, voltage conversion can be performed, which is the function and working principle of the transformer.