A pie-type solid insulation high-frequency transformer based on 3D printing

Abstract

The present invention provides a pie-type solid-insulation high-frequency transformer based on 3D printing, which includes: the winding mold shell includes a winding inner shell, a secondary winding shell and a winding shell, and the winding inner shell is wound with a primary winding and a secondary winding shell The upper winding is equipped with a secondary winding, and the secondary winding shell is nested in one end of the winding inner shell to form an integrated structure, so that the primary winding and the secondary winding form an upper and lower pie-shaped winding structure; the winding shell is placed on the integrated structure, and the primary winding A sealed space is formed between the winding, the secondary winding and the winding shell; solid insulating material is filled in the sealed space; the magnetic core is plugged into the winding mold shell, and the magnetic core is plugged into the winding inner shell and the secondary winding shell so that the primary side The winding and the secondary winding are sleeved on the outer wall of the magnetic core. The invention solves the matching problem of the leakage inductance and the main inductance in the resonant soft switching circuit, and the difficult application of solid insulating materials, and realizes the design goals of high power density, high efficiency and high insulation strength.

Description

technical field [0001] The invention relates to the field of solid-insulated high-frequency transformers, in particular to a solid-state transformer-oriented pie-type solid-insulated high-frequency transformer based on 3D printing. Background technique [0002] Traditional industrial frequency transformers are large in size, weight and low in efficiency, and will generate a lot of losses when used in megawatt-level photovoltaic power generation systems. High-frequency transformers have the advantages of high power density and high efficiency, which can greatly improve the efficiency of the system . But at the same time, the small volume and heat dissipation area of ​​high-frequency transformers face high insulation and heat dissipation pressure. Traditional air insulation and transformer oil insulation are difficult to balance heat dissipation and insulation effects, and the insulation structure is complex. In addition, in the resonant soft switching circuit, an additional ...

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Problems solved by technology

[0002] Traditional industrial frequency transformers are large in size, weight and low in efficiency, and will generate a lot of losses when used in megawatt-level photovoltaic power generation systems. High-frequency transformers have the advantages of high power density and high efficiency, which can greatly improve the efficiency of the system

However, at the same time, the small volume and heat dissipation area of ​​high-frequency transformers face high insulation and heat dissipation pressure. Traditional air insulation and transformer oil insulation are difficult to balance heat dissipation and insulation effects, and the insulation structure is complex.

In addition, in the resonant soft switching circuit, an additional inductive magnetic element is required as a resonant component, which further increases the loss and volume of the system

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