The principle of operation of any transformer is based onphenomenon of self-induction. The transformer decreasing practically does not differ from increasing. It is enough to change the way of connection (turn over the element) and from the lowering it will be an increasing analog.
В цепях управления трансформаторы используются to organize galvanic isolation, when the input of the device comes a phase and grounded zero, and the output voltage appears without a grounded neutral. This is mainly used to power equipment that operates on logic elements.
Transformer - a device consisting of twowindings with laminated core, which is recruited from electrical steel. If it is necessary to make an ordinary galvanic isolation, then these coils must be made with the same number of turns. If you need to make a step-down transformer, then the number of turns will be different.
Voltage is supplied to the input of the device (in this casean electromotive force arises in the winding, which generates a magnetic field). This field intersects the turns of the second coil, where its own electromotive force of self-induction arises. In turn, in the second coil, voltage also arises, which will differ from the primary one as many times as the number of turns of both windings differs.
The calculation of the step-down transformer is necessary,To understand what should be the parameters of the device. Due to the fact that the EMF of self-induction arises due to the movement, the transformer operates only on alternating voltage. That is why in the home network - only alternating current.
Today it is mainly used suchkind of like a step-down transformer. For most often there is a need to convert high voltage to low. They are used in the field of urban electrification (at substations and power plants). Steam turbines and hydraulic units generate voltage with the expectation of providing energy to a specific area of the city, so it is important to use step-down transformers so that the initial voltage at each of the sections is converted into acceptable for domestic needs.
When buying a transformer, it is important to payattention to efficiency, power and the number of turns of both windings. There are transformers with several outputs (this means that the device has several groups of connections and, depending on the size of the input and output values, the necessary circuit is formed). These are universal transformers. True, they are a bit more expensive, but they are in great demand.
There are transformers for welding.Here are used raising analogs. This is done in order to create the currents needed to melt the metal. These devices are also selected according to some parameters. The main, as it is easy to guess, is the current strength.
