Dual-frequency universal power transformer

Abstract

The invention relates to a dual-frequency universal power transformer. The power transformer comprises high-voltage coils, low-voltage coils and voltage-regulating coils, wherein the high-voltage coils, the low-voltage coils and the voltage-regulating coils are correspondingly arranged on the same iron core. The high-voltage coils are at least divided into two parts of coils arrayed at intervals in the axial direction of the iron core, and all the parts of coils of the high-voltage coils are connected in parallel or in series; all parts, corresponding to the high-voltage coils, of the voltage-regulating coils are split and arrayed at intervals and connected in series in a one-to-one correspondence mode. Preferably, the section areas of the wire diameters of voltage-regulating sections in the voltage-regulating coils are sequentially reduced gradually according to the sequence that the voltage-regulating sections are connected into the high-voltage coils in series. The high-voltage coils and the corresponding coils are split and arranged at intervals, and series connection or parallel connection adjustment is used for controlling matching, so that multiple operation modes are combined; the more the high-voltage coils and the corresponding voltage-regulating coils are separated, the more the operation modes can be provided by the power transformer, so that the power transformer can be suitable for a very wide voltage regulating range.

Description

technical field [0001] The invention relates to the application field of power transformers, in particular to a dual-frequency and universal power transformer. Background technique [0002] In the prior art, the applications of power transformers are all directional applications, and the frequency and voltage are fixed when designing and constructing power plants and power stations. There are two commonly used frequencies of 50Hz and 60Hz, and the grid voltage is also very different. A transformer designed and manufactured for a certain voltage level or a certain project cannot be directly applied to other projects; at the same time, when a certain transformer When damage occurs or emergency power supply is required in a certain area, since it takes at least one month to manufacture a transformer, it cannot meet the needs of maintenance, replacement and emergency power supply, which will cause huge economic losses and even serious political impact. Therefore, none of the po...

AI Technical Summary

Problems solved by technology

There are two commonly used frequencies of 50Hz and 60Hz, and the grid voltage is also very different. A transformer designed and manufactured for a certain voltage level or a certain project cannot be directly applied to other projects; at the same time, when a certain transformer When damage occurs or emergency power supply is required in a certain area, since it takes at least one month to manufacture a transformer, it cannot meet the needs of maintenance, replacement and emergency power supply, which will cause huge economic losses and even serious political impact

Therefore, the power transformers in the prior art cannot meet the power supply requirements under various conditions such as different power frequencies and different input voltages.

Images