A dry-type transformer with high efficiency cooling

Abstract

The invention discloses a transformer capable of effectively and rapidly discharging heat generated in the transformer. The transformer capable of conducting efficient cooling comprises a shell (1) and a core (2) located in the shell (1). A primary coil (3) and a secondary coil (4) are wound around the core (2) in sequence. Insulation layers (5) with the heat-dissipation function are arranged between the core (2) and the primary coil (3) and between the primary coil (3) and the secondary coil (4) respectively. At least one temperature sensing device (9) is arranged between the core (2) and the primary coil (3). The temperature sensing device (9) is connected with a control circuit portion and then connected with a device driving liquid to flow. The insulation layers (5) are provided with air holes (6) and evaporation holes (7), wherein the air holes are arranged in parallel with the axial direction of the core (2) and the evaporation holes (7) can evaporate the liquid. The upper end of each evaporation hole (7) is communicated with a condenser and after being communicated with a liquid storage machine, the condenser is communicated with the lower end of each evaporation hole (7).

Description

technical field [0001] The invention relates to a transformer, in particular to a transformer capable of discharging heat generated in the transformer. Background technique [0002] In the past few years, due to the substantial increase in industrial and residential electricity consumption, long-distance power transmission has become more and more common, so the working power of transformers has continued to increase. At the same time, the electronics industry requires that the power grid or local power supply must be reliable and stable. For transformers The requirements for operational safety and reliability are also increasing. However, as the power of the transformer increases, the eddy current heating and coil heating also increase accordingly, especially the local high temperature near the core and the coil, which will not only reduce the power and service life, but also cause serious problems in power supply. It is a problem that must be faced in the structure of dry...

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Problems solved by technology

However, as the power of the transformer increases, the eddy current heating and coil heating also increase accordingly, especially the local high temperature near the core and the coil, which will not only reduce the power and service life, but also cause serious problems in power supply. It is a problem that must be faced in the structure of dry-type transformers

At present, the general heat dissipation measure for dry-type transformers is to cool the secondary coil by forced air. Since the coil is generally spirally wound in multiple layers in the radial direction, and most of the coils are cast with epoxy resin, it affects heat dissipation. question

At present, there are so-called separate heat pipes placed between the coils in foreign countries. There is an evaporable liquid in the heat pipe. When the heat pipe is heated, the liquid evaporates and takes the heat out of the transformer, and then circulates into the heat pipe after condensation. The heat exchange efficiency of strip heat pipes is limited, and the recirculation process of the liquid flowing into the heat pipe after evaporation and condensation is complicated, and the liquid flow resistance is relatively large, and the energy loss in the forced driving liquid flow link is also large

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