Transformer magnetic integration structure integrating leakage inductance and excitation inductance and integration method thereof

Abstract

The invention discloses a transformer magnetic integration structure integrating leakage inductance and excitation inductance and an integration method of the transformer magnetic integration structure, and belongs to the high-frequency isolation switch power supply direction in the field of power electronics. In order to overcome the related problems of non-standard magnetic core structure or low magnetic core volume utilization rate, complex design, limitation in popularization and application and the like in the common magnetic integration method, two standard UI magnetic cores are used for a common converter containing three magnetic element structures of leakage inductance, excitation inductance and a transformer; by reasonably designing a winding connection mode and parameters, integration among leakage inductance, excitation inductance and a transformer is realized, and compared with discrete magnetic elements, the number of the magnetic elements of the converter can be reduced, the volume proportion occupied in the converter is reduced, the volume of a converter system is further reduced, and the power density is improved as an important index. Efficient and high-power-density operation of the system is achieved, and the flexibility and reliability of operation are improved.

Description

technical field [0001] The invention relates to a power electronic magnetic integration technology, in particular to a transformer magnetic integration structure integrating leakage inductance and excitation induction and an integration method thereof, belonging to the direction of high-frequency isolated switching power supply in the field of power electronics. Background technique [0002] In recent years, all kinds of converters have developed rapidly due to their high transmission efficiency and easy realization of soft switching. With the wide application of wide bandgap semiconductor devices such as silicon carbide (SiC) and gallium nitride (GaN), conversion Devices are developing in the direction of high frequency, high efficiency, and high power density. However, these converters usually contain multiple magnetic components such as inductors and transformers. According to statistics, the weight of magnetic components accounts for 30% to 40% of the weight of the conve...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the related problems of non-standard magnetic core structure or low utilization rate of magnetic core volume, complex design, and limitations in popularization and application in the above-mentioned commonly used magnetic integration methods, the present invention discloses a transformer integrating leakage inductance and excitation inductance The technical problem to be solved by the magnetic integration structure and its integration method is: for commonly used converters with three magnetic element structures of leakage inductance, excitation inductance and transformer, two standard UI cores are used, and the winding connection method is reasonably designed and parameters to realize the integration between leakage inductance, excitation induction and transformer. Compared with discrete magnetic components, it can reduce the number of magnetic components in the converter, reduce the volume ratio in the converter, and further reduce the size of the converter system. Increase the power density, an important indicator, to achieve high-efficiency and high-power-density operation of the system, and improve the flexibility and reliability of operation

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