Basic Knowledge Of Transformers

The role of the transformer

A transformer is a static electrical device that converts an AC voltage of a certain value into an AC voltage of another value of the same frequency. The voltage of the electric energy generated by the generator of the power plant is generally 6-10kv. It needs to go through the transmission line before it can be delivered to long-distance users. In order to reduce loss and save materials, it is necessary to increase the voltage generated by the generator to 10kv, 15kV, 35kv, 110kv, 220kv, 330kv and other high-voltage or ultra-high voltage for long-distance power transmission, so it is necessary to use a transformer to increase the voltage. The user must use the transformer to adjust the voltage value to the voltage value required by various electrical equipment.

Classification of transformers

The classification of transformers is divided into dry-type transformers (directly cooled by air), oil-immersed transformers (mostly used in power transformers), and water-cooled transformers for transformers with higher voltage and larger capacity. According to the transformer core, it can be divided into core type transformer (winding surrounded by core) shell type transformer (iron core surrounded by group)

Basic structure of a transformer

The basic structure of the transformer, the nameplate and rating of the transformer, there is a formula for calculating the secondary side current of the primary side of the three-phase transformer. How a transformer works. The no-load operation of the transformer and the load operation of the transformer. The more turns, the higher the voltage, and the transformation ratio of the transformer: a transformation ratio greater than 1 is a step-down transformer, and a transformation ratio less than 1 is a step-up transformer. The ratio between the primary side and the secondary side is called the transformation ratio, and the current and voltage are inversely proportional.