CN204480858U - A kind of iron core of transformer - Google Patents

Abstract

The utility model provides an iron core of a transformer, which includes a core column and an iron yoke, the core column includes a plurality of stacked first iron chips, the iron yoke includes a plurality of stacked second iron chips, the first iron chips and The second iron chips corresponding to the first iron chips are staggered and stacked; The narrowing end of the chip is overlapped with the groove of the second core chip; the core column includes a side column and a central column, the cross section of the side column parallel to the first core chip is trapezoidal, and the cross section of the central column parallel to the first core chip is a parallelogram ; The overlapping joints of the core column and the iron yoke form a seam, the seam is stepped, and the cross section of the iron yoke is rectangular or D-shaped. The stepped joint can effectively reduce the no-load iron core loss of the transformer and effectively reduce the noise. The iron yoke with a rectangular or D-shaped cross section further reduces the noise and no-load loss while saving production costs.

Description

iron core of a transformer

technical field

The utility model relates to the field of transformers, in particular to an iron core of a transformer.

Background technique

A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. It has a common iron core and several windings cross-linked with it, and the spatial position between them remains unchanged. When a certain winding receives AC power from the power supply, it generates magnetism through inductance, and the electromagnetic induction principle of magnetic induction generates electricity changes the voltage, and transmits AC power at the same frequency and different voltages on the remaining windings. As the magnetic circuit part of the transformer, the transformer core plays an important role in the normal operation of the transformer.

A transformer consists of an iron core and a coil, and is a device that uses the principle of electromagnetic induction to change the AC voltage. Wherein, the iron core includes an iron yoke and a core column, and the iron yoke and the core column are connected at a joint. Referring to Figure 3, the cross-sectional shape of the core column and the iron yoke in the traditional transformer is O-shaped. This connection method between the core column and the iron yoke makes the iron core heavier and consumes more materials, which increases the production cost. At the same time The loss and noise of the iron core are also proportional to the weight of the iron core.

Utility model content

The utility model provides an iron core of a transformer to solve the technical problems of heavy weight, many consumables and high noise of the existing transformer iron core.

The utility model provides an iron core of a transformer, comprising a core column and an iron yoke,

The core column includes a plurality of stacked first core chips, the iron yoke includes a plurality of stacked second core chips, and the first core chips and the second core chips corresponding to the first core chips are stacked alternately to form flux loop;

The two ends of the first core chip shrink towards the direction of the end, and the position corresponding to the first core chip is provided with a groove on the second core chip, and the groove is recessed along the direction of the shrinkage of the first core chip, and the narrowing end of the first core chip overlapping with the groove of the second core chip;

The core column includes a side column and a central column, the cross section of the side column parallel to the first core chip is trapezoidal, and the cross section of the central column parallel to the first core chip is a parallelogram;

A seam is formed at the overlapping joint of the core column and the iron yoke, and the seam is stepped, and the cross section of the iron yoke is rectangular or D-shaped.

Further, the number of first iron chip stages arranged on the high-voltage side of the stem is one stage less than the number of first iron chips arranged on the low-voltage side of the stem.

Further, the number of stages of the second core chips arranged on the high-voltage side of the iron yoke is one less than the number of stages of the second core chips arranged on the low-voltage side of the stem.

Further, the cross section of the stem is rectangular or D-shaped.

The beneficial effects of the utility model:

The iron core of the utility model transformer includes a core post and an iron yoke, the core post includes a plurality of stacked first iron chips, the iron yoke includes a plurality of stacked second iron chips, the first iron chips and the first iron chips The second iron chips corresponding to the chips are staggered and stacked to form a magnetic flux circuit; the two ends of the first iron chips shrink toward the end direction, and grooves are provided on the second iron chips at positions corresponding to the first iron chips. The groove is sunken along the shrinking direction of the first core chip, and the narrowed end of the first core chip is overlapped with the groove of the second core chip; It is trapezoidal, and the section of the central column parallel to the first core sheet is a parallelogram; the joint between the core column and the iron yoke forms a seam, and the seam is stepped, and the cross section of the iron yoke is rectangular or D-shaped. The stepped joint can effectively reduce the no-load iron core loss of the transformer and effectively reduce the noise. The iron yoke with a rectangular or D-shaped cross section can greatly reduce the weight of the iron core while ensuring the overlapping effect of the core column and the iron yoke. And making consumables, while saving production costs, it also further reduces noise and no-load loss.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation of the utility model. In the attached picture:

Fig. 1 is the structure schematic diagram of the iron core of the utility model embodiment transformer;

Fig. 2 is a schematic diagram of a partially enlarged structure at place A shown in Fig. 1;

Figure 3 is a cross-sectional view along line E-E in Figure 1; and

Fig. 4 is a sectional view along line F-F in Fig. 1 .

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Referring to Fig. 1 and Fig. 2, the embodiment of the utility model provides an iron core of a transformer, including a core column 10 and an iron yoke 20, the core column 10 includes a plurality of stacked first core chips 11, and the iron yoke 20 includes a plurality of A stacked second core sheet 21, the first core sheet 11 and the second core sheet 21 corresponding to the first core sheet 11 are stacked alternately to form a magnetic flux circuit; the two ends of the first core sheet 11 face The direction of the end portion is narrowed, and the position corresponding to the first core chip 11 is provided with a groove on the second core chip 21, and the groove is recessed along the direction in which the first core chip 11 shrinks. The grooves of the core chips 21 are overlapped; the stem 10 includes side columns and a central column, the side columns are trapezoidal in cross-section parallel to the first core chip 11, and the cross-section of the central column parallel to the first core chip 11 is a parallelogram; the core column 10 and the iron yoke 20 are joined together to form a seam, the seam is stepped, and the cross section of the iron yoke 20 is rectangular or D-shaped. When the traditional staggered connection between the core column 10 and the iron yoke 20 is used, the air gap on a certain cross-section in the insertion area is relatively concentrated, and a large alternating electromagnetic force acts on the connection between the core column 10 and the iron yoke 20. cracks, causing strong vibration noise. However, in the case of stepped joints, the lines of magnetic force can enter the adjacent iron chips vertically, and the no-load current is also reduced. At this time, the electromagnetic force acting on the iron chips is very small, and the electromagnetic force in the insertion area The role of the iron sheet is compressed, so that the noise of the transformer is significantly reduced. Due to industrial mass production, the traditional iron yoke 20 adopts O-shaped iron chips with consistent specifications. Referring to FIG. While improving the connection effect, the weight of the iron core and the production consumables are greatly reduced, and the noise and no-load loss are further reduced while saving production costs.

In addition, the length direction of the core column 10 can be arranged perpendicular to the length direction of the iron yoke 20 , which makes the manufacturing process simpler and more convenient, and the appearance of the iron core is cleaner.

Specifically, the number of first core chips 11 disposed on the high-voltage side of the stem 10 is one less than the number of first core chips 11 disposed on the low-voltage side of the stem 10 . Optionally, the number of second core sheets 21 arranged on the high voltage side of the iron yoke 20 is one less than the number of second iron sheets 21 arranged on the low voltage side of the stem 10 . With this design, the connection terminals of the high-voltage side and the low-voltage side can be arranged on the outside, which makes the connection mode of the transformer core more convenient.

Furthermore, the cross section of the stem 10 is rectangular or D-shaped. In this way, the consumables of the stem 10 are reduced, so that the weight of the transformer is lighter and the no-load loss is smaller.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (4)

1. the iron core of a transformer, comprise stem stem (10) and iron yoke (20), it is characterized in that, described stem stem (10) comprises first lamination (11) of multiple stacked setting, described iron yoke (20) comprises second lamination (21) of multiple stacked setting, described first lamination (11) and described second lamination (21) corresponding with described first lamination (11) interlocking splice, in order to form flux circuit; The two ends of described first lamination (11) reduce towards end direction, the upper position corresponding with described first lamination (11) of described second lamination (21) is provided with groove, described groove is along the direction depression that described first lamination (11) is reduced, and the end that reduces of described first lamination (11) splices with the groove of described second lamination (21); Described stem stem (10) comprises side column and newel, and the cross section that described side column is parallel to described first lamination (11) is trapezoidal, and described newel is parallel to the cross section parallelogram of described first lamination (11); The place of splicing of described stem stem (10) and described iron yoke (20) forms seam, and described seam is stepped, and the cross section of described iron yoke (20) is rectangular or D shape.

2. the iron core of transformer according to claim 1, is characterized in that, is arranged on high-tension side described first lamination (11) progression of described stem stem (10) one-level fewer than described first lamination (11) progression being arranged at described stem stem (10) low-pressure side.

3. the iron core of transformer according to claim 1, is characterized in that, is arranged on high-tension side described second lamination (21) progression of described iron yoke (20) one-level fewer than described second lamination (21) progression being arranged at described stem stem (10) low-pressure side.

4. according to the iron core of the arbitrary described transformer of claims 1 to 3, it is characterized in that, the rectangular or D shape of the cross section of described stem stem (10).