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What knowledge of transformers needs everyone to master?

Release time:2020-05-12 16:11:29      Number of hits:375

Transformer is a kind of more important power equipment. Generally speaking, the performance and production of the transformer measure the level of the transformer and realize the efficiency of the transformer. For the transformer, it is necessary to understand his application, the principle of production and other basic knowledge before using it, which is conducive to the use and performance of the transformer, and is also conducive to better maintenance and maintenance. For transformers, generally speaking, the following transformer knowledge is required:

1. The production principle of the transformer:

The daily work of the generator is that the coil moves through the magnetic field, and then the magnetic field moves through the fixed coil. The electric potential is generated in this way. The principle of generating electric potential is that the value of the magnetic flux is unchanged, but the amount of magnetic flux intersecting with the coil But there are changes, this is both the principle of mutual induction. Similarly, transformers also operate using this principle, in this way, devices that transform voltage, current, and impedance.

2. In the circuit, the transformer symbol is:

3. Technical parameters:

There are corresponding technical requirements for different types of transformers, which can be expressed by corresponding technical parameters. For example, the main technical parameters of the power transformer are: rated power, rated voltage and voltage ratio, rated frequency, operating temperature level, temperature rise, voltage adjustment rate, insulation performance and moisture resistance performance. The main technical parameters of the general low-frequency transformer are: voltage transformation Ratio, frequency characteristics, nonlinear distortion, efficiency, etc.

a. Voltage ratio:

The number of windings of the two sets of transformers are N1 and N2, respectively, N1 is the primary and N2 is the secondary. When an AC voltage is applied to the primary coil, an induced electromotive force is generated across the secondary coil. When N2> N1, the induced electromotive force is higher than the voltage applied by the primary. Such a transformer is called a step-up transformer: when N2, the induced electromotive force is lower than the primary voltage. This transformer is called a step-down transformer. The primary secondary voltage and the number of coil turns have the following relationship.

Transformers are manufactured using the principle of electromagnetic induction and have their own unique operation methods. For transformer applications, these are huge applications.


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