Multistage coarse and fine adjustment transformer

Abstract

The invention provides a multistage coarse and fine adjustment transformer, which belongs to the technical field of transformers and comprises a first transformer body and a second transformer body. The first transformer body comprises a first iron core column, a fine adjustment coil, a coarse adjustment coil group, a first high-voltage coil and a first low-voltage coil; the second transformer body comprises a second iron core column, a second high-voltage coil and a second low-voltage coil, and the tail end of the second high-voltage coil is connected to the fine adjustment coil; the second low-voltage coil is connected in series with the first low-voltage coil; the coarse adjustment coil group comprises a first coarse adjustment coil and a second coarse adjustment coil, the winding directions of the second coarse adjustment coil and the first coarse adjustment coil are opposite, and the second coarse adjustment coil and the first coarse adjustment coil are both connected with the head end of the second high-voltage coil; and the fine adjustment coil is connected with the first coarse adjustment coil or the second coarse adjustment coil. According to the multistage coarse and fine adjustment transformer provided by the invention, the first coarse adjustment coil and the second coarse adjustment coil which are opposite in winding direction are arranged on the structure of the first transformer body, so that the capacity of the second transformer body is reduced, and the cost of the transformer is reduced.

Description

Technical field [0001] The present invention belongs to the technical field of transformers, and more particularly, it is to relate to a multi-stage coarse fine modulation transformer. Background technique [0002] The number of low-voltage side regulators and regulation ranges are important parameters of special transformers, especially for electric furnace transformers, often require more voltage regulation level, wider voltage regulation range, at this time, multiple-magnifier multi-level Rough fine structure. The coarse-conditioned coils of the conventional multi-stage coarse fine-tuning structure are linearly connected in series, and the transformer is controlled by the combination switching of the coarse coils and the fine-conditioned coils at all levels of the coarse coil. [0003] In the transformer of multi-stage multi-stage coarse fine-tuning structure, in all of the regulation range, the low voltage voltage of the second device and the low voltage voltage of the first ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage coarse and fine adjustment transformer, which aims to solve the problem of large capacity of the second body in the transformer structure

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