Description
The so-called electronics transformer is a broadband transformer. For communication transformers, nonlinear distortion is an extremely important indicator. Therefore, the transformer is required to work at the initial permeability of the magnetic core, so that even if the transformer with very small power like the input transformer, the shape has to be quite large. . In addition to considering the frequency characteristics of the transformer, how to reduce the loss is also a very concern.
Specification
Electronics Transformer
1. Operating frequency: 20khz-300khz
2. Output power: customized
3. Operating temperature: -40℃ to +125℃
4. Storage temperature: -25℃ to +85℃
5. Storage humidity: 30 to 95%
characteristics
1. The AC power input is rectified and filtered into DC;
2. The switching tube is controlled by a high-frequency PWM (pulse width modulation) signal, and that DC is added to the primary of the switching transformer;
3. The secondary of the switching transformer induces a high-frequency voltage, Rectification and filtering supply the load;
4. The output part is fed back to the control circuit through a certain circuit to control the PWM duty cycle to achieve the purpose of stable output. When the AC power is input, it generally needs to pass through something like a current loop to filter out the interference on the grid, and at the same time filter the interference of the power supply to the grid; when the power is the same, the higher the switching frequency, the smaller the volume of the switching transformer. But the higher the requirements for the switching tube; the secondary of the switching transformer can have multiple windings or one winding with multiple taps to obtain the required output; generally, some protection circuits should be added, such as no-load, short-circuit protection, etc. Otherwise, the switching power supply may be burnt.
Details
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