Classification of Transformers (Ⅱ)
From the analysis of the working mechanism, the three-phase transformer in the case of uniform load, the current voltage of different phases in addition to the 120 ° phase difference, the size of the current voltage, amplitude, frequency and single-phase is the same. Multi-phase transformer multi-phase alternating current is usually three-phase alternating current using balanced transformer conversion. There are three basic types of balancing transformers: Scott transformers, Lee Bronk transformers and Wood Bridge transformers. According to the cooling form of the transformer can be divided into dry, oil-immersed and inflatable transformers according to the cooling medium, can also be divided into spontaneous cooling type transformer, evaporative cooling type transformer according to the cooling form.
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Do you know the basic principle of transformer
The transformer adopts the principle of magnetic coupling, and the currents of the main and auxiliary coils are not connected by wires, but are coupled together by electromagnetic induction. Transformers use magnetic flux as a medium to transfer energy between the grid and the load.
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Today we come to talk about the development history of the transformer
In 1831, Faraday used the device shown in Figure 1 and found that at the moment the left switch was turned on, the ammeter on the right would deflect immediately and quickly recover. It is proved that electromagnetism can be generated by each other, and the law of electromagnetic induction is established. Not only laid the theoretical foundation for the birth of the transformer, this model is the earliest model of the transformer.
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Daily Science Popularization-Transformer
Transformers, a device that changes the voltage of the power supply, vary greatly in size. From the small square box that changes household electricity to start model trains, to the large transformers in substations that can control extremely large electrical energy, they are all in one category.
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The loss in the operation of the transformer includes two parts;(1) is caused by the iron core, when the coil is energized, because the magnetic lines of force are alternating, causing eddy current and hysteresis loss in the iron core, which is collectively referred to as iron loss. (2) It is caused by the resistance of the coil itself. When the primary coil and the secondary coil of the transformer have current flow, power loss will occur. This loss is called copper loss.
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The structure of the voltage regulator is the same as that of the autotransformer, except that the iron core is made into a toroidal coil and wound on the toroidal iron core. The secondary coil tap uses a sliding brush contact to make the contact slide along the coil surface to achieve smooth adjustment voltage.
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Transformer distribution operation, the transformer is essential, familiar with and master the basic knowledge of the transformer is very necessary, the basic knowledge of the transformer is a necessary skill for every power person!
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In Senior high school textbooks, the working principle of the transformer has been explained in detail. However, I am afraid that most people will forget it completely after the college entrance examination. But the knowledge is lost, the application is not lost, the transformer has penetrated into every corner of our lives. The transformer, which is so close to us that every ampere of current we use, flows out of the transformer. Within 1km of our location, there must be a transformer. You didn't notice, you just didn't notice.
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