Explore the structure and types of transformers

Transformer is the basic equipment of transmission and distribution, widely used in industry, agriculture, transportation, urban communities and other fields. China has about 17 million transformers in operation on the network, with a total capacity of about 11 billion kVA. Transformer loss accounts for about 40% of power loss in transmission and distribution, which has great energy saving potential.

The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage, and the main components are the primary coil, the secondary coil and the core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for lifting voltage, matching impedance, safety isolation, etc. In a generator, whether the coil is moving through a magnetic field or the magnetic field is moving through a fixed coil, the electric potential can be induced in the coil. In both cases, the value of the magnetic flux is unchanged, but the number of magnetic flux of the chain intersecting the coil is changed, which is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual inductance to transform voltage, current and impedance. Transformer components include the body (iron core, winding, insulation, lead), transformer oil, fuel tank and cooling device, pressure regulator, protection device (moisture absorber, safety airway, gas relay, oil storage tank and temperature measurement device, etc.) and outlet bushing.

Power Transformer ‌ : used for boost, buck and distribution of transmission and distribution system. ‌ Instrument transformers ‌ : such as voltage transformers and current transformers, used in measuring instruments and relay protection devices. ‌ test transformer ‌ : used for high voltage test of electrical equipment. ‌ Special transformer ‌ : including electric furnace transformer, rectifier transformer, audio transformer, medium frequency transformer, high frequency transformer and pulse transformer, etc.

Transformer (Transformer) is a device that uses the principle of electromagnetic induction to change the AC voltage, and the main components are primary coils, secondary coils and iron cores (magnetic cores). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage regulation (magnetic saturation transformer), etc., and transformer is a device that uses the principle of electromagnetic induction to change AC voltage, its core functions include voltage transformation, current transformation, impedance transformation, isolation and voltage regulation.