High-voltage transformer easy to cool

Abstract

The invention discloses a high-voltage transformer easy to cool. The high-voltage transformer comprises a bottom plate and a coil. The surface of the bottom plate is fixedly connected to the bottom ofa clamping frame by a first fixing bolt. An iron core is fixedly connected to a central portion of the upper surface of the clamping frame. The iron core comprises five iron core modules. Air ducts are arranged between the iron core modules. The high-voltage transformer is reasonable in design, practical in functions, and very suitable for use in a high-voltage transformer. The high-voltage transformer has adjustable heat dissipation area and air duct sizes. Different combination modes of the iron core modules and different widths of the air gaps between the iron core modules can achieve different heat dissipation effects, so that the high-voltage transformer can be adapted to different loss distributions and insulation levels. Due to improvement in heat dissipation conditions, ferrite with lower cost and good thermal conductivity can be used as a core material, and there is no need to use amorphous or nanocrystalline iron core material with high cost and low iron loss, thereby reducing material cost, achieving good functionality and being suitable for widespread promotion.

Description

technical field [0001] The invention relates to the technical field of transformer equipment, in particular to a high-voltage transformer convenient for heat dissipation. Background technique [0002] In high-power power electronic transformers, circuit topologies such as DAB and LLC resonance are often used. High-frequency transformers are the key passive components in this type of topology. Generally speaking, the magnetic components occupy a large amount of space in the whole converter. With the emergence of a new generation of wide-bandgap power electronic switching devices represented by silicon carbide devices, the switching frequency can be greatly increased due to the reduction of switching losses; and the increase in switching frequency, the volume of high-frequency transformers in high-power power electronic transformers can be reduced. The power density of the system as a whole is significantly reduced. As the operating frequency increases, while the power densi...

AI Technical Summary

Problems solved by technology

Ferromagnetic materials such as traditional silicon steel sheets have large losses at high frequencies, so they are not suitable for use in high-power power electronic transformers

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