Double-voltage transformer

Abstract

The invention includes at least a primary winding and a secondary winding, where the primary winding are separated into several segments by several taps, including even series-parallel segments as well as several tap segments, the series-parallel switches are led through cables to series-parallel switches, and the tap segments are led through cables to tap switches, it adjusts the series-parallel switches to connect in series or parallel with each series-parallel segment so as to implement voltage conversion and adjusts the tap switches to cut off or connect parts of the tap segments so as to achieve the purpose of increasing/decreasing number of turns and then implement fine voltage adjustment, thus making the turn voltage and output voltage constant as a transformer operates at high and low voltages. Its output voltage is stable, its operation is reliable, its resistance is low, it makes full use of number of winding turns, its road loss is low and it has the characters of small bulk, operating convenience and so on.

Description

Technical field: [0001] The invention belongs to a transformer applicable to two different voltages with constant output voltage, and belongs to the field of transformer manufacturing. Background technique: [0002] In existing transformer products, usually the voltage level and transformation ratio of a transformer are fixed, the primary winding can only take one voltage level, and induce another voltage of the secondary winding, their respective turns and common turn voltage has remained the same. However, in some foreign regions, electricity is a competitive commodity. Users can choose different power companies. There are two different power grids near the transformer, which provide two different voltages. Users hope that the output voltage, that is, the voltage used, will remain unchanged. The transformer can switch between the two voltage grids under certain conditions. Another situation is that in my country's Qinghai, Gansu and other places, facing the possibility o...

AI Technical Summary

Problems solved by technology

At the same time, there are some other voltage regulation methods, but they are only suitable for micro-transformers, and their structural characteristics cannot meet the voltage level and capacity requirements of power transformers.

For the above methods, there are common shortcomings, that is, when designing the winding, it is necessary to calculate the number of winding turns and the cross-sectional area of ​​the wire under various design voltages (the number of turns is more when the voltage is high, and the number of turns is low when the voltage is low). When the voltage is large, the current is large), the number of winding turns and the cross-sectional area of ​​the winding must be designed with the maximum value, and when the voltage is low, the redundant turns are removed by the switch, which cannot be used.

In short, the number of winding turns is large, the cross-section of the wire is large, the product volume is large, and the waste of materials is serious.

At the same time, the impedance and load loss will also change greatly during the voltage regulation process, which cannot achieve the purpose of saving materials and energy, so it cannot be widely used.

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