The special equipment for special transformers is the material basis for transformer manufacturers' technological innovation, product development, quality improvement, efficiency improvement, energy saving and consumption reduction, efficiency improvement, equipment renewal and competitiveness enhancement. To manufacture high-quality, high-performance transformers, high-quality, high-performance transformer-specific equipment must be used. The expansion of the transformer market is undoubtedly the gospel of special equipment.
The future market is full of opportunities and temptations for manufacturers of special transformer special equipment. Experts in the industry predict that by 2005, 60% of the transformer products will reach the international level in the late 1990s, and 10% of the products will reach the world contemporary level. Transformer products will continue to develop rapidly during the "11th Five-Year Plan" period.
The reason why special transformers develop so well is inseparable from his materials. Let's find out what kinds of materials it has:
1. Iron core materials The iron core materials used in transformers are mainly iron pieces, low silicon pieces, high silicon pieces, and the addition of silicon to steel sheets can reduce the electrical conductivity of the steel sheet and increase the resistivity. It can reduce eddy currents and cause losses. cut back. We usually call silicon-added steel sheets as silicon steel sheets. The quality of silicon steel sheets used in transformers has a great relationship. The quality of silicon steel sheets is usually expressed by the magnetic flux density B. The B value of general black iron sheets is 6000-8000, low silicon wafer is 9000-11000, high silicon wafer is 12000-16000,
2. Materials commonly used for winding transformers are enameled wire, gauze covered wire, silk covered wire and paper covered wire, the most commonly used enameled wire. For the requirements of the wire, the conductive property is good, the insulating varnish layer has sufficient heat resistance, and it must have certain corrosion resistance. Generally, it is better to use QZ type high strength polyester enameled wire.
3. Insulation materials In the winding transformer, the insulation between the layers of the coil frame and the isolation between the winding resistances must use insulating materials. The general transformer frame material can be made of phenolic cardboard, epoxy board, or cardboard. Polyester film, telephone paper, 6520 composite paper can be used for isolation between layers, and yellow wax cloth or imine film can be used for isolation between windings.
4. Impregnated material After the transformer is wound, the last step is to pass through the impregnated insulating varnish. It can enhance the mechanical strength of the transformer, improve the insulation performance and extend the service life. In general, cresol varnish can be used as the impregnating material. Or 1032 insulation paint, resin paint.