Transformers is the use of the principle of electromagnetic induction to change the AC voltage apparatus, the main component is the primary coil, the secondary coil and the core (core). In electrical equipment and radio circuits, commonly used for the lifting voltage, impedance matching, safety isolation. The main features are: voltage conversion, the current conversion, impedance transformation, isolation, voltage regulator (magnetic saturation transformer) and the like. It can be divided according to purpose: distribution transformers, power transformers, sealed transformers, modular transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformer, rectifier transformers.
With the continued health of China's rapid economic development, electricity demand continues to grow rapidly. In 2011, production in the country amounted to 1.43 billion kVA transformer, an increase of 6.86%. 2011, China's transformer manufacturing industries above designated size (the main business income of 2,000 yuan or more) companies have 1461, it achieved sales of 290.14 billion yuan, total profit of 16.608 billion yuan, the asset size of 263.84 billion yuan, sales profit of 339.72 billion.
Transformers in the electrical equipment and the radio circuit, the transformer used as lifting voltage, impedance matching, safety isolation. In the generator, either the coil moves through the magnetic field or magnetic field moves through the stationary coil, can EMF in the coil, in both cases, the value of the magnetic flux are the same, The most basic form of the transformer, includes two sets of wound coil wire, and another said inductively close together. With the continuous development of transformer industry, more and more enterprises to enter the transformer industry, there are many companies come to the fore, such as Ming Yuan transformer was founded in the early 2000s set up by the joint stock company specializing in dedicated transformers, reactors, filters and other research and development, manufacturers, after nearly a decade of development has now become one of the few advanced technology industry leader and pioneer.
