A transformer is an electromagnetic device that transfers power from one circuit to the next using the principle of mutual inductance. Inductive coupling caused by mutual magnetic fields is called mutual induction. For example, a single-phase transformer has two coils, one primary and the other secondary. Any power source, such as an alternator, will power the primary coil. The secondary coil receives a voltage from the magnetic field of the primary coil. This secondary coil is connected to the load and receives power as needed. A step-up transformer is a transformer used to increase the voltage to a higher level. On the other hand, a step-down transformer reduces the voltage to a lower level. The Auto Transformer works the same as two transformers with different windings. It operates on Faraday's law of electromagnetic induction, which states that whenever a magnetic field and a conductor are brought closer together, an electromagnetic force is induced in a conductor.

　　Whenever an AC voltage is applied to the primary winding, an electromagnetic force is created due to the alternating behavior of the magnetic field formed by the static conductors and the AC source. According to Faraday's law, the field and conductor must have a relative displacement, so in this case, the field is alternating and the conductor is constant. As a result, a voltage is generated in the primary winding of the transformer.

　　The primary winding is affected by the induced electromotive force, which produces an alternating magnetic flux. The flux connects the secondary winding of the transformer through the core of the transformer. Mutual induction is the term for this process. The secondary winding experiences an electromotive force. The magnitude of the secondary electromagnetic force is calculated based on the number of turns on the secondary winding.

　　A transformer consists of two parts: the conductor and the core.

　　Copper is used to making conductors in autotransformers. They have a low resistance to the elements. The copper conductors are separated from each other by insulation. Impregnated paper, mica, and other materials are used for insulation. Due to the insulation, current losses from eddy currents can be reduced. The windings surround the iron core. Single-winding transformers use less copper than two-winding transformers.

　　The magnetic core is used to transfer flux from the primary to the secondary. The magnetic core is made of magnetic materials such as CRGO steel and silicon steel. The most efficient material for the core is CRGO steel, which has the lowest hysteresis losses. The role of the magnetic core is to transfer the magnetic flux from one part of the winding to another.

　　Zhejiang Ilander Electric Co., Ltd is a Current Transformer Manufacturer, the main products are Three-phase Transformer, welcome to consult!