High-frequency transformer

9 month ago

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10 month

Product details

Working principle of high frequency transformer

Introduce：

The high frequency transformer is the most important component of the switching power supply, and the proportion of turns of each winding coil of the high frequency transformer determines the output voltage. It is a power transformer whose operating frequency exceeds the intermediate frequency, which is mainly used as a high-frequency switching power transformer in high-frequency switching power supplies. Transmission power is relatively large, the working frequency is relatively low; The transmission power is relatively small, the operating frequency is relatively high. In this way, both the difference in operating frequency, and the difference in transmission power, the design method of power transformers with different grades of operating frequency is not the same, and it should be self-evident.

How it works:

High frequency transformer is the most important component of switching power supply. The switching power supply generally uses a half-bridge power conversion circuit, and when working, the two switching triodes take turns to generate 100kHz high-frequency pulse waves, and then step-down through the high-frequency transformer to output low voltage alternating current, and the proportion of turns of each winding coil of the high-frequency transformer determines the output voltage.

The main cause of electromagnetic interference in high frequency power transformer is the suction force between the magnetic core and the repulsion force between the winding wire. The change frequency of these forces is consistent with the operating frequency of the high-frequency power transformer. Therefore, a high-frequency power transformer with an operating frequency of about 100khz will not produce audio noise below 20khz for no special reason.

Application：

The component divides into several grades according to the working frequency: 10k Hz-50k Hz, 50k Hz-100k Hz, 100k Hz-500k Hz, 500k Hz-1M Hz, above 1M Hz. When the transmission power is large, the IGBT is generally used as the power device. The operating frequency will be low due to the tail phenomenon of the shutdown current. If the transmission power is small, MOSFET is available. The operating frequency is high.

Our main products are Electronic Transformer、Differential Mode Inductor、I-type Inductor、Common Mode Inductor and so on.

Please contact us if necessary. Look forward to your sincere cooperation.

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Xuzhou Jiuli Electronics Co., Ltd

Audited supplier

10 month

Main Product: Electronic Transformer, High-frequency Transformer, Switching Power Supply Transformer, Differential Mode Inductor, I-type Inductor , Common Mode Inductor

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