A pulse transformer and its manufacturing method

Abstract

The invention discloses a pulse transformer and a manufacturing method thereof. The manufacturing method includes a magnetic core body wound with at least two winding coils. The magnetic core body is of a split structure and comprises a first magnetic core body and a second magnetic core body. The manufacturing process of the pulse transformer includes that winding wires are wound on the first magnetic core body or the second magnetic core body to form corresponding winding coils, and the starting ends and the tail ends of the winding wires are welded to corresponding outer electrodes. The first magnetic core body is arranged on the second magnetic core body, and the first magnetic core body and the second magnetic core body are enclosed to form a closed magnetic circuit. The magnetic core body wound by the coils in the pulse transformer is of the split structure, before the first magnetic core body and the second magnetic core body form the complete closed magnetic circuit, the winding wires forming the winding coils are wound on at least one of the magnetic core bodies, the technical problem of winding difficulty caused by the fact that the magnetic core body is of an integrated annual structure in the prior art can be solved, automatic winding is achieved, and cost is reduced.

Description

Technical field [0001] The present invention relates to the technical field of magnetic devices, especially pulse transformers and manufacturing methods thereof. Background technique [0002] Pulse transformers are mainly used for DC isolation, impedance matching, high voltage isolation, etc., to complete primary and secondary DC current isolation, impedance matching and primary and secondary high voltage protection; pulse transformers are mainly used in IT equipment such as routers, modems, and laptop computers. [0003] A transformer is a device that transforms AC voltage, current and impedance. The transformer includes a magnetic core and a coil. The coil has two or more windings. The winding connected to the pulse signal source or input signal is defined as the primary coil, which is connected to the working current or output The signal winding is defined as the secondary coil; when there is an alternating current or input signal in the primary coil, an alternating magnetic flu...

AI Technical Summary

Problems solved by technology

[0004] Existing pulse transformers, in order to achieve a higher magnetic coupling effect, reduce magnetic flux leakage, and thus increase the communication bandwidth, often use a magnetic ring as the core body. The magnetic ring structure can achieve a higher signal bandwidth, but the magnetic ring The structure is a closed structure, which is not conducive to the automatic winding process, especially for the magnetic core with a small inner hole. At present, the industry uses a large number of manual threading. The electrical characteristics also vary greatly

This method not only causes a great waste of human resources, but also causes certain troubles to the application of the client due to the instability of the characteristics

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