For high-voltage transformers, I believe that friends of this word is not strange it! Although the high-voltage transformer due to the use of the use is not particularly extensive, but really work, life and medicine indispensable object, the need for high-voltage transformers in the region there are several: medical equipment needs to be used, such as hospitals inside the X-ray machine, high-potential therapeutic instrument, etc.; microelectronics electrostatic removal technology, air purification, fumes and exhaust gas treatment and printing, electrostatic treatment, etc. There are high-voltage transformers involved. Transformer involved. Domestic production of high-voltage transformer manufacturers are Guangzhou, such as home electronics, Shun Tian Group, the day of the change of security and other companies.
High-voltage transformer refers to the principle of electromagnetic induction through the conversion of low voltage into high voltage transformer. So let's learn about its classification and working principle!
High-voltage apparatus classification:
Transformers can be divided into according to the use: distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, ? Single-phase transformer, furnace transformer, rectifier transformer, reactor, anti-interference transformer, lightning transformer, box-type transformer test transformer, corner transformer, high-current transformer, excitation transformer.
Principle of operation:
Transformer is a device for transforming AC voltage, current and impedance, when AC current is passed through the primary coil, AC magnetic flux is generated in the iron core (or magnetic core), so that the secondary coil induces voltage (or current). Transformer by the iron core (or core) and coil composition, the coil has two or more windings, which is connected to the power supply winding called the primary coil, the rest of the winding called the secondary coil.
Ideal transformer:
Not counting the resistance and iron consumption of the primary and secondary windings, ? The transformer whose coupling coefficient ?K=1? is called an ideal transformer.
So it is structured like this?
The transformer consists of an iron core and primary and secondary windings.
1. Iron core? Iron core is the main magnetic circuit part of the transformer. Usually by the silicon content is high, the thickness of 0.35?mm?.3mm?.27?mm, respectively? Surface coated with insulating varnish of hot-rolled or cold-rolled silicon steel sheet stacked into? Iron core is divided into iron core column and cross piece two parts, iron core column set with winding; cross piece is closed magnetic circuit with? Iron core structure of the basic form of heart type and shell type two kinds of
2. winding? Winding is the circuit part of the transformer,? It is a double wire wrapped insulated flat wire or enameled round wire wound into? The basic principle of the transformer is the principle of electromagnetic induction, single-phase double winding transformer as an example to illustrate the basic principle of its work: when the primary side of the windings plus voltage?1, the flow of current?1, in the core of the alternating flux?1, these fluxes are called the main magnetic flux, under which the two sides of the windings were induced potential?1, ?2, the induced potential formula: E = 4.44fN?m?where: E - - the effective value of the induced potential? - the effective value of the induced potential?f - frequency?N - the number of turns?m - the maximum value of the main magnetic flux? As the secondary winding and primary winding turns are different, the size of the induced potential E1 and E2 are different, and when the internal impedance voltage drop is omitted, the size of the voltages ?1 and ?2 are also different.
When the secondary side of the transformer is unloaded, the primary side only flows through the main flux current (?0), this current is called the excitation current. When the secondary side loaded with load current flowing through the load current ?2, but also in the core to produce magnetic flux, trying to change the main magnetic flux, but the primary voltage is unchanged when the main magnetic flux is unchanged, the primary side will have to flow through the two parts of the current, part of the excitation current ?0, part of the current is used to balance the ?2, so that this part of the current with the change of the ?2 changes and changes. When the current is multiplied by the number of turns, it is the magnetic potential.? The above balancing effect is essentially a magnetic potential balancing effect, the transformer is through the magnetic potential balancing effect to realize the first and second side of the energy transfer.? Technical parameters of different types of transformers have corresponding technical requirements, can be expressed in the corresponding technical parameters. Such as power transformer main technical parameters are: rated power, rated voltage and voltage ratio, rated frequency, operating temperature level, temperature rise, voltage regulation rate, insulation and moisture resistance, for general low frequency transformer main technical parameters are: transformer ratio, frequency characteristics, nonlinear distortion, magnetic shielding and electrostatic shielding, efficiency, etc..
The above is a small introduction to you today about the structure of the high-voltage transformer content? Do you have a new understanding of high-voltage transformers? Nowadays, China's rapid economic development, the degree of mechanization is getting higher and higher, people have been transformed from the initial physical labor into mental labor, by a variety of machinery to replace our physical work, not only to save people save energy, but also to let the machinery to help us do what we are not enough ability to do. High-voltage transformers, although not as refrigerators, washing machines, those appliances as accompanied by our lives, but its application also has a certain impact on our lives and the development of enterprises, to understand its structure, our work and career have some help Oh!
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