Oct. 13, 2020
The transformer is relatively 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 the basic knowledge of its application and production principles before using it, which is conducive to the use and performance of the transformer, and it is also conducive to better maintenance and maintenance. Transformer manufacturers provide you with the following transformer knowledge:
1. The principle of making 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. In this way, an electric potential is generated. The principle of electric potential generation is: the value of magnetic flux is constant, but the amount of magnetic flux intersecting with the coil But there are changes. This is the principle of mutual induction. Similarly, the transformer also operates on this principle, in this way, a device that transforms voltage, current, and impedance.
2. In the circuit, the transformer symbol is: T
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 power transformers are rated power, rated voltage, and voltage ratio, rated frequency, operating temperature level, temperature rise, voltage adjustment rate, insulation performance, and moisture resistance. The main technical parameters for general low-frequency transformers are transformation Ratio, frequency characteristics, nonlinear distortion, efficiency, etc.
a. Voltage ratio:
The number of turns of the two sets of transformer coils is N1 and N2 respectively. N1 is the primary and N2 is the secondary. Applying an AC voltage to the primary coil, the induced electromotive force will be generated at both ends of the secondary coil. When N2>N1, the induced electromotive force is higher than the voltage applied to the primary. This kind of transformer is called a step-up transformer: when N2, its induced electromotive force is lower than the primary voltage, this kind of transformer is called a step-down transformer.
The transformer is made using the principle of electromagnetic induction and has its own unique operating model.
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