Transformers Many people may have only seen the shape of the chassis, but how the structure inside and the principle of production are different; probably not many people know. Simply speaking, in a generator, whether the coil moves through a fixed coil through a magnetic field or a magnetic field, the potential can be induced in the coil. In both cases, the value of the magnetic flux is constant, but the magnetic flux intersects the coil. There is a change in the number of passes. This is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to convert voltage, current and impedance.
There are corresponding technical requirements for different types of transformers, which can be expressed by corresponding technical parameters. For example, the main parameters of the power transformer are: rated power, rated voltage and voltage ratio, rated frequency, working temperature level, temperature. The main technical parameters for general low-frequency transformers are: transformer ratio, frequency characteristics, non-AC distortion, magnetic shielding and electrostatic shielding, and efficiency.
When the output power P2 of the transformer is equal to the input power P1, the efficiency η is equal to 100%, and the transformer will not produce any loss. However, the transformer is actually not available. The transformer always generates losses when transmitting power. The loss mainly includes copper. Damage and iron loss when AC current is passed through the transformer.
The direction and magnitude of the magnetic lines of force through the silicon steel sheet of the transformer change, so that the internal molecules of the silicon steel sheet rub against each other, releasing heat energy, thereby losing a part of the electric energy, which is the hysteresis loss. The other is the eddy current loss, when the transformer is working. The magnetic flux passes through the core, and an induced current is generated on a plane perpendicular to the magnetic line. Since the current forms a circulating current and forms a spiral, it is called a vortex. The presence of the eddy current causes the core to generate heat and consume energy. This loss is called eddy current loss.