Phase-shift rectification dry-type transformer

Abstract

The invention discloses a phase-shift rectification dry-type transformer which comprises a base, two mounting plates and more than two sets of transformer coil assemblies. Each transformer coil assembly comprises high-voltage coils, a low-voltage coil, an iron core and a plurality of supporting plates. The supporting plates are tightly clamped between the high-voltage coils and the low-voltage coil in a matched mode. A plurality of radial air passages are arranged on the low-voltage coil. Gaps S are reserved in the end portions of the high-voltage coils at the time of winding of the high-voltage coils. Outgoing lines of the high-voltage coils are led out through the gaps S. The high-voltage coils and the low-voltage coil are made of epoxy resin in a pouring mode. The two mounting plates are arranged vertically. Two ends of the iron core are respectively and fixedly connected between the two mounting plates in the transverse direction. More than two transformer coil assemblies are fixedly connected between the two mounting plates in sequence along the vertical direction. The phase-shift rectification dry-type transformer is good in heat dissipation performance, reasonable in coil winding, reduced in cost, strong in overall mechanical strength, good in weather resistance, and smaller in occupied area.

Description

technical field [0001] The invention relates to a transformer, in particular to a phase-shifting rectification dry-type transformer. Background technique [0002] Phase-shifting rectifier dry-type transformer is a multi-split single unit that realizes the direct conversion of "high voltage to high voltage" with multiple pulses (24 pulses, 30 pulses, 36 pulses, 54 pulses, and 72 pulses) Type transformer, the secondary side adopts phase shifting to realize the system to obtain the voltage and current without stepless regulation and sinusoidal law change without harmonics, the voltage accuracy of the secondary side is controlled within ±0.5%, and the shift angle is controlled within ±0.50. [0003] The existing phase-shifting rectification dry-type transformer generally adopts H-level insulation (open ventilation type). The low-voltage coil and high-voltage coil of this type of transformer are provided with axial air passages, and the heat generated by the coil during the use o...

AI Technical Summary

Problems solved by technology

[0003] Existing phase-shifting rectification dry-type transformers generally adopt H-level insulation (open ventilation type). The low-voltage coil and high-voltage coil of this type of transformer are provided with axial air passages, and the heat generated by the coil during the use of the transformer is mainly passed through Axial airway exhaust, insufficient heat dissipation; at the same time, the transformer coil is normally constructed with the high-voltage coil inside and the low-voltage coil outside, and several lead-out wires need to be drawn out from the high-voltage coil, and the lead-out wires are connected to the terminals. Traditional high-voltage lead-out Because the wire is randomly drawn between the two coils, the lead wire will bulge around the outer circumference of the high-voltage coil, and the outer diameter of the high-voltage coil will increase. If the inner diameter of the low-voltage coil remains unchanged, the outer circumference of the high-voltage coil and the inner wall of the low-voltage coil will The distance between them will be shortened, so that the inner diameter of the low-voltage coil can only be increased to meet the normal use of the transformer coil, resulting in an increase in the overall cost of the transformer, and the coil components of this type of transformer are arranged vertically and occupy a large area. Low-voltage coils and high-voltage coils are only processed by dipping paint after winding, and the overall mechanical strength is insufficient and the weather resistance is poor.

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