Special transformers, electric furnaces, transformers, transformers
In addition to converting AC voltage, transformers also have various other uses, such as changing the frequency of power supply, power supply for rectifier equipment, power supply for welding equipment, electric furnace power supply, or voltage transformer, Some transformers with special purposes such as current transformers are generally called special transformers.
Since the working conditions and load conditions of these transformers are different from those of general transformers, the calculation methods of general transformers cannot be used.
The calculation methods of special transformers Materials
, Iron core materials
The core materials used in transformers mainly include iron sheets, low silicon sheets, and high silicon sheets. Adding silicon to steel sheets can reduce the conductivity of the steel sheets and increase the resistivity. It can reduce eddy currents and reduce losses. Steel sheets with added silicon are usually called silicon steel sheets. The quality of the transformer has a great relationship with the quality of the silicon steel sheets used. The quality of the silicon steel sheets is usually expressed by magnetic flux density. Generally, the value of black iron sheet is low silicon wafer, and high silicon wafer is,
Commonly used materials for winding transformers
Enameled wire, yarn covered wire, silk covered wire, paper covered wire, the most commonly used enameled wire The requirements for wires are good electrical conductivity, sufficient heat resistance of the insulating paint layer, and a certain degree of corrosion resistance. Generally, it is best to use high-strength polyester enameled wire
and insulating materials
In winding transformers, insulation materials must be used for isolation between coil frame layers and windings. Generally, transformer frame materials can be made of phenolic cardboard, epoxy board, or polyester film between cardboards. Telephone Paper, composite paper, etc. can be used as isolation, and yellow wax cloth or imine film can be used as isolation between windings. , it can enhance the mechanical strength of the transformer, improve the insulation performance, and extend the service life. Generally, cresol varnish can be used as the impregnating material or insulating paint or resin paint.
The company mainly produces
and below oil-immersed power transformers, rectifier transformers, dry-type power transformers, dry-type rectifier transformers, oil-immersed amorphous alloy transformers, reactors
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Switch cabinets, American and European box-type substations, electric furnaces and mining transformers, etc. Many series and models of products, with an annual production of more than 10,000 transformers and box-type substation sets. One of its products has obtained a utility model patent certificate, and oil-immersed power transformers and oil-immersed amorphous alloy transformers have obtained energy-saving product certificates and have been included in the annual government procurement list of energy-saving products. The products manufactured have achieved good sales results in the power grid, power generation, mining, new energy, transportation, manufacturing and petrochemical industries. The products sell well in more than a dozen provinces and cities such as Shandong, Zhejiang, Henan, Yunnan, Inner Mongolia, Harbin, Changchun, Jilin, and Beijing, and have won bids in power grids in northern Hebei, Jilin, etc., and the products are exported to Africa, Kazakhstan, Myanmar and other countries.
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Special transformer electric furnace transformer transformer