High-power high-frequency five-phase magnetic integrated transformer

Abstract

The invention discloses a high-power high-frequency five-phase magnetic integrated transformer and belongs to the technical field of high-frequency transformers. The transformer comprises five single-phase transformers, an upper magnetic cover, a lower magnetic cover and an insulation structure. Each single-phase transformer comprises a magnetic core column, a primary coil and a secondary coil from inside to outside. The five single-phase transformers are arranged between the upper magnetic cover and the lower magnetic cover in a regular pentagon staggered sequence, the difference of input excitation phases of the five primary coils is 72 degrees, outgoing lines of the five primary coils are in star connection, and incoming lines of the five secondary coils are in star connection. The insulation structures are arranged between the magnetic core column and the primary coil, between the primary coil and the secondary coil, and between the five secondary coils and the upper and lower top covers. The high-power high-frequency five-phase magnetic integrated transformer designed by the invention has the advantages of high power density, high heat dissipation performance and high working stability, and has a large-range leakage inductance and excitation inductance adjustment interval.

Description

technical field [0001] The invention relates to a high-power high-frequency five-phase magnetic integrated transformer, which belongs to the technical field of high-frequency transformers. Background technique [0002] The large-capacity new energy electric field is directly connected to the grid through a power frequency transformer, which occupies a large space and has low power density. With the rapid development of power electronics technology, more attention has been paid to modular power electronic transformers, which include two core components: high-power high-frequency transformers and power electronic converters. [0003] For high-power high-frequency transformers, the increase in operating frequency can reduce the volume of high-power high-frequency transformers and increase power density. But at the same time, it will also increase the core loss and winding loss of the high-power high-frequency transformer, and the miniaturization of the volume will reduce the h...

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Problems solved by technology

But for more phases, the research aspect of the high-frequency multi-phase magnetic integrated transformer of higher power, do not find explanation or report similar to the present invention technology at present, also do not collect similar data both at home and abroad

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