CN103646758A - Low-noise amorphous alloy dry-type traction rectifier transformer - Google Patents

Abstract

A low-noise amorphous alloy dry-type traction rectifier transformer relates to the technical field of rectifier transformers. At present, the geometric shape of the coils of amorphous alloy dry-type traction rectifier transformers is generally a rectangular shape with corner arcs, which has relatively high noise and poor short-circuit resistance. The invention includes a base, an iron core, and a coil. The coil is sheathed on the outside of the iron core. The iron core is made of superimposed sheets of amorphous alloy material; segment, the third arc segment, the fourth arc segment, the fifth arc segment, the sixth arc segment, the seventh arc segment, the eighth arc segment, the first arc segment, the second arc segment, The third circular arc segment, the fourth circular arc segment, the fifth circular arc segment, the sixth circular arc segment, the seventh circular arc segment and the eighth circular arc segment are sequentially connected to form a symmetrical rectangular structure. The technical scheme has low noise and strong short-circuit resistance, and improves the operation reliability of the transformer.

Description

A low-noise amorphous alloy dry-type traction rectifier transformer

technical field

The invention belongs to the technical field of rectifier transformers, in particular to a low-noise amorphous alloy dry-type traction rectifier transformer.

Background technique

In the existing amorphous alloy dry-type traction rectifier transformers, the geometric shape of the coils is generally a rectangular shape with corner arcs, and there are reflections of vibration waves between the coils and on the surface of the coil and the iron core, so its The noise is louder and the ability to resist short circuit is poor.

Contents of the invention

In order to solve the above problems, the present invention proposes a low-noise amorphous alloy dry-type traction rectifier transformer with low noise and strong short-circuit resistance, which improves the operational reliability of the transformer and facilitates the large-scale promotion of non-gold alloy traction rectifier transformers.

For this reason, the present invention takes following technical scheme:

A low-noise amorphous alloy dry-type traction rectifier transformer, including a base, an iron core, and a coil. The coil is placed outside the iron core. The iron core is formed by superimposing sheets of amorphous alloy materials; the feature is that the cross section of the coil is Including the first arc segment, the second arc segment, the third arc segment, the fourth arc segment, the fifth arc segment, the sixth arc segment, the seventh arc segment, and the eighth arc segment, all The first circular arc segment, the second circular arc segment, the third circular arc segment, the fourth circular arc segment, the fifth circular arc segment, the sixth circular arc segment, the seventh circular arc segment, and the eighth circular arc segment The connections form a symmetrical rectangular-like structure.

As a further improvement and supplement to the above technical solutions, the present invention also includes the following additional technical features.

The quadratic rectangular structure has four sides with convex arc edges, and adjacent sides are smoothly connected by transitional arc edges to form a quasi-rectangular structure with eight arc segments.

The arc length of the first arc segment and the fifth arc segment of the two opposite sides of the rectangular structure is greater than the arc length of the third arc segment and the seventh arc segment of the other two opposite sides, the first arc segment, the fifth arc segment The radius of curvature of the arc segment is greater than the radius of curvature of the third arc segment and the seventh arc segment; The radius of curvature of the fourth arc segment, the sixth arc segment, and the eighth arc segment. The inner surface of the coil is arc-shaped, which can effectively reduce noise when matched with the flat surface of the amorphous iron core.

The coil includes a valve-side coil and a grid-side coil wrapped around the valve-side coil. The cross-sections of the valve-side coil and the grid-side coil are similar, and both have a rectangular structure.

The grid-side coil is a wire-wound casting coil. The grid side coil adopts resin casting type, which has small partial discharge, good coil strength and strong short-circuit resistance.

The valve-side coil is a foil-wound casting coil. The coil on the valve side is a foil-wound casting type, which effectively suppresses the transverse magnetic flux leakage of the transformer, reduces additional losses, and further enhances the sudden short-circuit resistance of the coil on the valve side.

The inner surface of the valve-side coil is lined with an insulating support cylinder, and a plurality of evenly distributed cooling mesh holes are opened on the insulation support cylinder. The anti-short circuit capability of the valve-side coil can be effectively improved, and the heat dissipation of the valve-side coil is improved while strengthening the mechanical strength of the valve-side coil.

An epoxy resin layer for connection is provided between the insulating support cylinder and the valve-side coil. The epoxy resin layer integrates the insulating support cylinder and the valve side coil into a whole.

The insulating support cylinder is a rectangular structure.

The iron core of the present invention is made of amorphous alloy material, and the cross section of the coil is formed by intersecting eight sections of arcs, which overcomes the shortcomings of the traditional rectangular coil structure in the past, such as high noise and poor short-circuit resistance, and reduces the noise of the amorphous alloy traction rectifier transformer , The ability to resist short-circuit is strengthened, the operation reliability of the transformer is improved, and it is convenient for the large-scale promotion of the non-gold alloy traction rectifier transformer.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is a cross-sectional view of the coil in FIG. 1 .

FIG. 3 is a schematic diagram of the p-direction structure in FIG. 2 .

In the figure: 1-iron core, 2-coil, 201-the first arc segment, 202-the second arc segment, 203-the third arc segment, 204-the fourth arc segment, 205-the fifth arc segment Section, 206-sixth arc segment, 207-seventh arc segment, 208-eighth arc segment, 3-base, 4-insulation support cylinder, 5-valve side coil, 6-grid side coil.

Detailed ways

The present invention/invention will be further described below in conjunction with the accompanying drawings.

With reference to Fig. 1, Fig. 2, Fig. 3, the present invention comprises base 3, iron core 1, coil 2, and coil 2 is sleeved on the outside of iron core 1, and iron core 1 is formed by stacking of amorphous alloy material sheet; Coil 2 cross section comprises The first arc segment 201, the second arc segment 202, the third arc segment 203, the fourth arc segment 204, the fifth arc segment 205, the sixth arc segment 206, the seventh arc segment 207, the Eight arc segments 208, the first arc segment 201, the second arc segment 202, the third arc segment 203, the fourth arc segment 204, the fifth arc segment 205, the sixth arc segment 206, the seventh arc segment The arc segment 207 and the eighth arc segment 208 are sequentially connected to form a symmetrical rectangular structure. The quasi-rectangular structure has four sides with convex arc edges, and the adjacent sides are smoothly connected by transitional arc edges to form a quasi-rectangular structure with eight arc segments. The arc lengths of the first arc segment 201 and the fifth arc segment 205 of the two opposite sides of the rectangular structure are greater than the arc lengths of the third arc segment 203 and the seventh arc segment 207 of the other two opposite sides, and the first circle The radius of curvature of the arc segment 201, the fifth arc segment 205 is greater than the radius of curvature of the third arc segment 203, the seventh arc segment 207, the radius of curvature of the third arc segment 203, the seventh arc segment 207 is greater than that of the transition The radius of curvature of the second arc segment 202 , the fourth arc segment 204 , the sixth arc segment 206 , and the eighth arc segment 208 of the arc edge. The coil 2 includes a valve-side coil 5 and a grid-side coil 6 wrapped around the valve-side coil 5. The cross-sections of the valve-side coil 5 and the grid-side coil 6 are similar, and both have a rectangular structure. In order to ensure the strength while taking into account the short-circuit resistance capability, the grid-side coil 6 adopts a wire-wound cast coil, and the valve-side coil 5 adopts a foil-wound cast coil.

In order to strengthen the mechanical strength of the valve-side coil 5 and improve the heat dissipation of the valve-side coil 5, the inner surface of the valve-side coil 5 is lined with an insulating support tube 4, and a plurality of evenly distributed heat dissipation nets are set on the insulating support tube 4 hole. An epoxy resin layer for connection is provided between the insulating support cylinder 4 and the valve-side coil 5 . The insulating support cylinder 4 has a rectangular structure to increase the mating surface area with the valve-side coil 5 .

The arc-shaped inner surface of the valve-side coil 5 of the rectifier transformer of the present invention corresponds to the flat-shaped outer surface of the rectangular amorphous iron core 1, which is reflected in the effect of sound wave transmission and reflection, and has an obvious effect of reducing noise; The grid side coil 6 adopts resin casting type, which has small partial discharge, good coil strength and strong short-circuit resistance. The anti-sudden short circuit capability of the coil 5, an insulating support tube 4 is lined on the inner surface of the valve side coil 5, and the insulating support tube 4 has heat dissipation mesh, which improves the mechanical strength of the valve side coil 5 while improving the valve Heat dissipation of the side coil 5.

This embodiment has the technical features of the present invention, and can be widely used in dry-type amorphous alloy traction rectifier transformers.

Claims (9)

1. a low noise amorphous alloy dry-type traction rectifier transformer, comprises base (3), iron core (1), coil (2), and coil (2) is enclosed within iron core (1) outside, and described iron core (1) is formed by stacking by amorphous alloy material thin slice, it is characterized in that: coil (2) cross section comprises the first arc section (201), the second arc section (202), three-arc section (203), the 4th arc section (204), the 5th arc section (205), the 6th arc section (206), the 7th arc section (207), the 8th arc section (208), described the first arc section (201), the second arc section (202), three-arc section (203), the 4th arc section (204), the 5th arc section (205), the 6th arc section (206), the 7th arc section (207), the 8th arc section (208) is in turn connected to form symmetrical class rectangular configuration.

2. a kind of low noise amorphous alloy dry-type traction rectifier transformer as claimed in claim 1, it is characterized in that: described class rectangular configuration is the arc-shaped edges that four side is evagination, between adjacent side, by transition arc marginal ray slip, form the class rectangular configuration with eight arc sections.

3. a kind of low noise amorphous alloy dry-type traction rectifier transformer as claimed in claim 2, it is characterized in that: limit, two opposite sides first arc section (201) of class rectangular configuration, the arc length of the 5th arc section (205) is greater than other two opposite sides limit three-arc sections (203), the arc length of the 7th arc section (207), the first arc section (201), the radius of curvature of the 5th arc section (205) is greater than three-arc section (203), the radius of curvature of the 7th arc section (207), three-arc section (203), the radius of curvature of the 7th arc section (207) is greater than the second arc section (202) as transition arc limit, the 4th arc section (204), the 6th arc section (206), the radius of curvature of the 8th arc section (208).

4. a kind of low noise amorphous alloy dry-type traction rectifier transformer as claimed in claim 3, it is characterized in that: described coil (2) comprises valve lateral coil (5) and is coated at the net lateral coil (6) of valve lateral coil (5), valve lateral coil (5) is similar with net lateral coil (6) cross section, is class rectangular configuration.

5. a kind of low noise amorphous alloy dry-type traction rectifier transformer as claimed in claim 4, is characterized in that: described net lateral coil (6) is wire-wound cast-type coil.

6. a kind of low noise amorphous alloy dry-type traction rectifier transformer as claimed in claim 5, is characterized in that: described valve lateral coil (5) is for paper tinsel is around cast-type coil.

7. according to the arbitrary described a kind of low noise amorphous alloy dry-type traction rectifier transformer of right 1-6, it is characterized in that: an insulation supporting cylinder of inner surface liner (4) of described valve lateral coil (5), on described insulation supporting cylinder (4), offer a plurality of uniform heat radiation mesh.

8. according to a kind of low noise amorphous alloy dry-type traction rectifier transformer described in right 7, it is characterized in that: between insulation supporting cylinder (4) and valve lateral coil (5), be provided with the epoxy resin layer for being connected.

9. according to a kind of low noise amorphous alloy dry-type traction rectifier transformer described in right 8, it is characterized in that: described insulation supporting cylinder (4) is class rectangular configuration.

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