CN2255658Y

CN2255658Y - Transformer for power-supply output of frequency converter

Info

Publication number: CN2255658Y
Application number: CN 96200368
Authority: CN
Inventors: 马金城
Original assignee: WANJIN SPECIL TRANSFORMER FACTORY BEIJING
Current assignee: WANJIN SPECIL TRANSFORMER FACTORY BEIJING
Priority date: 1996-01-10
Filing date: 1996-01-10
Publication date: 1997-06-04
Anticipated expiration: 2006-01-10

Abstract

The utility model relates to a frequency changer power supply output transformer, comprising an iron core and a line bag composed of a first coil and a secondary coil. The utility model is characterized in that the inner part of the iron core is provided with an insulating layer made by nonferromagnetic materials. The utility model has the advantages of simple structure easy fabrication and obvious effect, the structure of the utility model is similar with the structure of the existing ordinary transformers, and the utility model can still use many existing mature technologies. The utility model can obviously enhance the linearity magnetizing range of the iron core and can effectively prevent transformers from heating, and the utility model can enhance the frequency adaptation range of the utility model.

Description

The converter power supply output transformer

The utility model relates to a kind of converter power supply output transformer.

Being used widely in various electric power systems of existing transformer, the structure of range transformer is broadly similar all, promptly is wound with the primary coil and the secondary coil of mutual correspondence on the iron core made from ferromagnetic material.Recent continuous development along with technology such as frequency controls, transformer usually will be used with frequency converter, and existing frequency converter can output frequency changes alternating current greatly, simultaneously, often have bigger DC component in its output current, thereby cause the null offset phenomenon.This just needs corresponding transformer can adapt to bigger frequency range and bigger null offset amount, but it can only be applicable to specific operating frequency and dead-center position accurately the structure qualification of existing transformer, when too high or null offset is big when its operating frequency, not only cause the power loss of this transformer to increase, and the phenomenon that the transformer heating very easily occurs even burn.

The purpose of this utility model is to provide a kind of converter power supply output transformer, with the operating frequency range of expansion transformer.

The purpose of this utility model is achieved in that converter power supply output transformer described in the utility model comprises iron core and by the line bag that primary coil, secondary coil are formed, it is characterized in that being provided with in the described iron core separator made from nonferromagnetic material.

Advantage of the present utility model is: 1, simple in structure, easily manufactured; The structure of this converter power supply output transformer is very similar to the structure of existing common transformer, and a lot of existing maturation process can prolong usefulness.2, effect is obvious; Adopt technical scheme described in the utility model, can obviously improve the linearity magnetization scope of iron core, prevent the transformer heating effectively, thereby improve its frequency adaptation scope and for the adaptive capacity of null offset.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1: structural representation of the present utility model.

Fig. 2: the utility model operation principle schematic diagram.

The described converter power supply output transformer of present embodiment is a kind of three-phase transformer, it has iron core 3 and three groups of relatively independent coils 1 of " day " font, its structure as shown in Figure 1, wherein the middle part of iron core 3 is provided with one deck separator 2, separator 2 is to make with the thick pottery of 1MM in this example.Fig. 2 shows operation principle of the present utility model, in Fig. 2, curve A is the magnetization curve of existing general ferromagnetic material, obviously, curve A is only through the very fast saturation area that promptly enters near level behind one section very narrow linear zone, so for existing transformer, if its structural parameters have deviation slightly, perhaps, when its operational environment is comparatively complicated, contain DC component etc. in, the power supply big such as the supply frequency excursion, this transformer will be operated in the saturation area, thereby causes heating even burn.Curve B is the magnetization curve of common nonferromagnetic material among Fig. 2, in this example, represents the magnetization curve of ceramic separator 2; Curve C is the magnetization curve that has the iron core 3 of separator 2 in the utility model, and this curve is by above-mentioned curve A, the addition of B along continuous straight runs and draw.As shown in Figure 2, the range of linearity in the curve C has obviously been widened, and is foundation with this curve, utilizes existing design of transformer means, promptly can provide the various technical parameters of converter power supply output transformer described in the utility model.

Claims

1, a kind of converter power supply output transformer comprises iron core and by the line bag (1) that primary coil, secondary coil are formed, it is characterized in that being provided with in the described iron core (3) separator made from nonferromagnetic material (2).