Magnetically-coupled resonant high-frequency air-core transformer

An air-core transformer and magnetic coupling resonance technology, applied in the field of high-frequency transformers, can solve the problems of large reluctance and low efficiency, and achieve the effect of overcoming large reluctance, transmitting energy efficiently, and having a large range of values.

Inactive Publication Date: 2014-09-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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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

Method used

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  • Magnetically-coupled resonant high-frequency air-core transformer
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  • Magnetically-coupled resonant high-frequency air-core transformer

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] Figure 1a It is a schematic structural diagram of an embodiment of the present invention. Such as Figure 1a As shown, the air-core transformer with series-parallel magnetic coupling structure of the present invention includes a winding frame 1 , a primary winding 4 , a primary matching capacitor 5 , a secondary winding 2 and a secondary matching capacitor 3 . The winding frame 1 is a circular structure made of insulating materials such as epoxy resin. The primary winding 4 and the secondary winding 2 are wound on the winding frame 1 in a non-concentric manner, and the winding direction makes the end with the same name in the same direction, and the section of the winding frame 1 can be as follows Figure 1b The circle shown in section 10 can also be as Figure 1c The square shape shown in section 11. One end of the primary winding 4...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F19/04H01F27/28
Inventor 张国强李康
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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