Magnetically-coupled resonant high-frequency air-core transformer

Abstract

A magnetically-coupled resonant high-frequency air-core transformer comprises a primary winding, a secondary winding, a winding framework, a primary matching capacitor and a secondary matching capacitor, wherein the primary winding and the primary matching capacitor are connected in series or in parallel, and in work, a circuit formed by the primary winding and the primary matching capacitor is in serial or parallel resonance; the secondary winding and the secondary matching capacitor are connected in series or in parallel, and a circuit formed by the secondary winding and the secondary matching capacitor is in serial or parallel resonance; one, two or several pairs of the secondary windings and the secondary matching capacitors can be provided; primary resonant frequency and secondary resonant frequency are the same; the primary winding and the secondary winding are wound on the winding framework; the winding framework is made of a non-magnetic material, preferably, an epoxy resin material. The winding framework of the air-core transformer can be annular or in other shapes, and the primary winding and the secondary winding are wound on the winding framework, so that a relatively high coupling coefficient is kept.

Description

technical field [0001] The invention relates to a high-frequency transformer, in particular to a high-frequency air-core transformer for power electronic transformers based on magnetic coupling resonance technology. Background technique [0002] In order to adapt to the future large-scale DC power generation, storage, transmission, and use, especially for large-scale photovoltaic power generation, large-scale electrochemical battery storage and conversion, large-scale DC power long-distance transmission, large-scale DC grid construction, and large-capacity DC power generation With the use of energy, it is possible to establish and develop high-voltage DC power grids. my country is vigorously developing various forms of large-scale DC power sources, such as photovoltaic power generation, electrochemical battery energy storage, and fuel cell power sources. The ideal access method for these large-scale DC power sources should be directly connected to the high-voltage DC power g...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the disadvantages of large reluctance and low efficiency of the above-mentioned existing air-core transformers, and propose a high-frequency transformer with a hollow structure

The invention can not only overcome the disadvantages of large reluctance and low efficiency of the air-core transformer, but also can transmit energy stably because the value range of the coupling coefficient k is relatively loose

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