Purpose and types of transformer.
transformer is a static electromagnetic equipment at work which converts AC voltage transformation.Iethis device allows you to increase or decrease it.Installed in power transformers is carried out on long distance transmission of electricity at high voltages up to 1150kV.And already directly in the places of consumption is lowering the voltage in the range 127-660V.At such values typically operate different electrical consumers, which are installed in the factories and in homes.Electrical appliances, electric welding and other elements in the high-voltage circuits also require the use of a transformer.They come in single- and three-phase, double or multiplex.
There are several types of transformers, each of which defined its functions and purpose.The power transformer converts electrical energy into the network that are intended for reception and use of this energy.The current transformer is a measurement of large currents in electrical systems devices.The voltage transformer converts the high voltage to low.The autotransformer is an electrical and electromagnetic coupling due to direct connection to the primary and secondary windings.The pulse transformer converts the pulse signals.Isolating transformer characterized in that the primary and secondary windings are not connected with each other electrically.In short, all kinds of transformer operation principle is somewhat similar.You can also select the torque converter, the principle of which is to transfer torque to the transmission from the engine.This device allows infinitely variable speed and torque.
Design and function of the transformer.
principle of the transformer is the manifestation of electromagnetic induction.This device consists of a magnetic core and two windings which are arranged thereon.Electricity is supplied to one, and the second connected consumers.As mentioned above, these windings are called primary and secondary, respectively.The yoke is made of electrical steel sheet, which elements are insulated with varnish.His unit, on which the coil is called the core.And it is this design has received more widespread sinceIt has a number of advantages - a simple winding insulation, ease of maintenance, good cooling conditions.As can be seen, the principle of the transformer is not so complicated.
There are also transformers armor design that significantly reduces their size.Most often there is single-phase transformers.This equipment side yoke winding play a protective role against mechanical damage.This is a very important factor, becausecompact transformers do not have a casing and with the rest of the equipment are generally in place.Three-phase transformers are often performed with the three rods.Bronesterzhnevaya design is also used in large power transformers.Even though it increases the costs of electricity, but will reduce the height of the magnetic core.
transformers distinguished by the method of connection rods: butt and laminated.The butt rods and yoke are collected separately and are connected to the fastening portion.In the stacked sheets are going to overlap.Laminated transformers are more used, becausethey have much higher mechanical strength.
principle of the transformer is also affected by the winding, which are cylindrical, disk and concentric.Equipment large and medium power are Buchholz.
