Transformer Principle And Applications

    A transformer is a stationary electrical device used to change alternating voltage and current, thereby transmitting alternating electrical energy. Its main components include a primary coil, a secondary coil, and a core, and its working principle is based on electromagnetic induction. Depending on their application, transformers can be divided into power transformers, test transformers, instrument transformers, and special - purpose transformers. Power transformers are key equipment for power transmission and distribution, and for power user distribution; test transformers are used for dielectric strength testing of electrical equipment; instrument transformers are used for electrical measurement and relay protection in distribution systems; special-purpose transformers include furnace transformers for smelting, welding transformers, electrolysis rectifier transformers, and small voltage regulator transformers, among others.

    A power transformer is a stationary electrical device used to convert a certain value of alternating voltage (current) into different values of voltage (current) with the same frequency. When the primary winding is supplied with alternating current, it generates alternating magnetic flux. Through the core's magnetic conduction, an alternating electromotive force is induced in the secondary winding. The magnitude of the secondary induced electromotive force is related to the number of turns in the primary and secondary windings, that is, the voltage is proportional to the number of turns. Its main function is to transmit electrical energy, so the rated capacity is its main parameter. Rated capacity is a commonly used value indicating power, representing the amount of electrical energy transmitted, expressed in kVA or MVA. When applying rated voltage to a transformer, the rated current under specified conditions can be determined based on the rated capacity to ensure that the temperature rise does not exceed the limit. The non- crystalline alloy core distribution transformer is an energy-saving power transformer, with the biggest advantage being its particularly low no-load loss value. Ensuring the no- load loss value is a core issue in the design process. In product structural layout, in addition to ensuring that the non-crystalline alloy core is not subjected to external forces, it is also necessary to precisely and reasonably select the characteristic parameters of the non-crystalline alloy.