High-voltage high-frequency transformer with single-phase high-power special insulation structure

Abstract

The invention discloses a high-voltage high-frequency transformer with a single-phase high-power special insulation structure. The high-voltage high-frequency transformer comprises a shell, an iron core arranged in the shell, a low-voltage inner coil wound on the iron core column, a high-voltage outer coil wound on the periphery of the low-voltage inner coil, and a lead connected with the leading-out terminal of the high-voltage outer coil, wherein the lead goes out of the shell, an iron core insulation layer is arranged between the low-voltage inner coil and the iron core column, a first encapsulation reserved gap is formed between the low-voltage inner coil and the high-voltage outer coil, and a second encapsulation reserved gap is formed between the high-voltage outer coil and the inner wall of the shell; and epoxy resin insulation layers are filled in the first and second encapsulation reserved gaps. Compared with the prior art of the existing high-frequency transformers (dry-type, air self-cooling type), the high-voltage high-frequency transformer has the advantages that the volume is reduced for more than 30%; 2, the leakage inductance is reduced for more than 80%; 3, the loss is reduced for more than 50%; and 4, the high-voltage high-frequency transformer has good electromagnetic compatibility with other electrical appliances in the cabinet body (the aluminum shell is grounded, and the electric potential is zero).

Description

technical field [0001] The invention relates to a high-voltage high-frequency transformer, in particular to a high-voltage high-frequency transformer with a single-phase high-power special insulation structure applied in a modern smart grid. Background technique [0002] An important consideration in transformer design is the electrical safety distance. According to the requirements of the national standard GB / T16935.1-2008, the electrical safety distance with air insulation is greater than 80mm when the withstand voltage is 30KV. Insulated wire, the distance can be shortened to 40mm. This will cause the high-voltage winding to have a large shape, a large amount of consumption, and a large leakage inductance (proportional to the distance), which will cause large losses. In order to dissipate heat, the volume or accessories (fans) will be increased, and the overall cost Tall and bulky. Contents of the invention [0003] The purpose of the present invention is to provide a ...

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Problems solved by technology

[0002] An important consideration in transformer design is the electrical safety distance. According to the requirements of the national standard GB / T16935.1-2008, the electrical safety distance with air insulation is greater than 80mm when the withstand voltage is 30KV. Insulated wire, the distance can be shortened to 40mm. This will cause the high-voltage winding to have a large shape, a large amount of consumption, and a large leakage inductance (proportional to the distance), which will cause large losses. In order to dissipate heat, the volume or accessories (fans) will be increased, and the overall cost tall and bulky

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