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Introduction to the structure of the transformer

The transformer is a functional component made by the principle of electromagnetic induction, which can transmit and change electrical energy or signal. It is mainly used to increase or decrease AC current and change impedance. Transformers are widely used. For example, they can transmit alternating current in power supply and distribution lines, electrical equipment and electronic equipment, and play the role of voltage transformation, current transformation, impedance transformation or isolation. There are many ways to classify transformers, and they can be divided into single-phase transformers and three-phase transformers according to the number of power supply phases.

The transformer is made by winding two or more sets of coils on the same coil frame or on the same iron core. Generally, the coil connected to the power source is called the primary winding, and the remaining coils are called the secondary windings.

1. Single-phase transformer structure characteristics
A single-phase transformer is a transformer whose primary winding is a single-phase winding. The primary winding and the secondary winding of the single-phase transformer are wound on the iron core, the primary winding is the AC voltage input terminal, and the secondary winding is the AC voltage output terminal.

2. Structure characteristics of the three-phase transformer
A three-phase transformer is a kind of transformer that is widely used in power equipment. The three-phase transformer is actually composed of three single-phase transformers with the same capacity. The primary winding (high-voltage coil) is three-phase, and the secondary winding (low-voltage coil) is also three-phase.

The internal structure of the three-phase transformer and the single-phase transformer are basically the same, both composed of the iron core (body) and the winding. The winding is the circuit of the transformer, the iron core is the magnetic circuit of the transformer, the two constitute the core of the transformer, namely the electromagnetic part. There are six sets of windings inside the three-phase power transmission transformer.

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