Three-phase energy saving transformer with unlaminated core and zero-clearance magnetic circuit

Abstract

The invention provides a three-phase energy saving transformer with an unlaminated core and a zero-clearance magnetic circuit. The three-phase energy saving transformer is a multi-technology with improved structure and process in the field of medium and large transformer manufacturing. The zero-clearance magnetic circuit is arranged to obtain the lowest iron loss and lowest man-hour and manufacturing cost. By the technology of replacing a laminated core with a wound core, the round cross-section core and a rectangular cross-section yoke can obtain the optimal process fitting; the core laminating cost is reduced; the magnetic loss is reduced; the three-phase energy saving transformer is suitable for manufacturing of a core-type or shell-type three-phase transformer of which the power is from tens of kilowatts to hundreds of thousands of kilowatts, and is a significant innovation in the transformer structure and the process technology.

Description

field of invention [0001] The invention belongs to the technical field of transformers in electricity, and relates to a magnetic circuit structure and a manufacturing process of a transformer, specifically, an energy-saving transformer with a new structure and a new process. Background technique [0002] The basic principle of a transformer is to change one AC voltage to another through electromagnetic induction. Its basic structure is the cross-linking of circuits (including windings and external circuits) and magnetic circuits to achieve mutual conversion of electrical energy and magnetic energy. In order to reduce the loss of magnetic energy, the iron core is usually made of thin silicon steel sheets. To put the winding into the magnetic circuit, the magnetic circuit must be made in sections to leave openings, then embedded in the winding, and then sealed. There are many gaps in the air gap—called the magnetic circuit gap. Although the magnetic circuit gap is very small, ...

AI Technical Summary

Problems solved by technology

Increasing the excitation current means increasing the no-load loss of the transformer; in addition, in the traditional three-phase transformer, the cross section of the iron core is circular, and laminations of different widths are stacked to form a circle, which is not as good as the rectangular lamination cross section of the iron yoke. Convenient, the process is particularly complicated, and the stacking requirements are very strict, which makes the man-hour efficiency of manufacturing transformers very low

[0003] In short, the existing transformers have large no-load loss, complex process structure, high manufacturing cost, and major structural improvements are needed

Images