Amorphous alloy transformer iron core of three-dimensional triangle structure

Abstract

An amorphous alloy transformer iron core of a three-dimensional triangle structure belongs to the technical field of electrical devices. The amorphous alloy transformer iron core of the three-dimensional triangle structure is formed by piecing three identical rectangular single frames whose sections are approximately semicircular. A manufacturing method thereof comprises steps of cutting, winding, assembling, annealing and molding. The amorphous alloy transformer iron core of the three-dimensional triangle structure has the advantages of saving materials, reducing loss and noise, balancing three phases, enabling coils not to be sleeved, and being stable in performance and strong in anti-short circuit capacity.

Claims

1. A method for manufacturing a triangular amorphous alloy 3D core for transformer made of three identical rectangle frames with approximately semicircular cross section, comprising: slitting a rectangular amorphous alloy strip with a fixed width into a plurality of trapezoid strips with different sizes; winding, by starting from a first stage winding of each of the three identical rectangle frames and using a rectangular module as inner support, a first trapezoid strip of the plurality of the trapezoid strips by layer from inside out and moving the trapezoid strip on a winding machine in a given direction, to form a shape with an upper portion of the rectangle frame and a lower portion of the rectangle frame outwardly inclined, wherein a cross section line taken through a side of the rectangle frame that divides the rectangle frame into two rectangles divides the rectangle frame into the upper portion and the lower portion; after reaching a required thickness of the first stage winding, at a second stage, winding a second trapezoid strip of the plurality of the trapezoid strips having a different size from the first trapezoid strip on an outer layer of the first stage winding to form a thickness of the second stage winding, and then consecutively winding and forming a plurality of stage windings, wherein widths of the plurality of stage windings are different from each other; combining and fixing limbs of three single frames each having two approximately semicircular cross section of two limb in order to constitute a circular core limb; conducting annealing for the assembled triangular 3D core with an annealing oven in order to relieve the internal stress, recover the magnetism, and further improve a performance of core; tying the combined core limbs with an insulation banding tape after aligning of the core to make the core to be a firm entirety.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is front view of the trapezoid strip of this invention.

(2) FIG. 2 is the winding of single frame of this invention.

(3) FIG. 3 is front view of the single frame of this invention.

(4) FIG. 4 is A-A section view of FIG. 3.

(5) FIG. 5 is 3D view of the single frame of this invention.

(6) FIG. 6 is vertical view of single frame before combination of this invention.

(7) FIG. 7 is vertical view of amorphous alloy 3D core of this invention.

(8) FIG. 8 is 3D view of amorphous alloy 3D core of this invention.

DETAILED DESCRIPTION

(9) A full and enabling discourse of this invention, integrating the appended figures, is set forth in the specification, in which:

(10) Showing in FIG. 1, a triangular amorphous alloy 3D core for transformer is made of three identical rectangle frames with approximate semicircular cross section,

(11) Wherein its manufacturing method is comprised by following steps:

(12) (1)

(13) Slitting

(14) The thickness of amorphous alloy material is usually 0.025 mm. Slit the rectangular amorphous alloy strips in fixed width into several sizes of trapezoid strips in the shape showing in FIG. 1.

(15) (2)

(16) Winding

(17) Rectangular mould 1, showing in FIG. 2, as inner support, starting from the first stage winding of the single frame, trapezoid strip is wound layer by layer from the inside out and make trapezoid strips in the winding machine follow the given direction, as a result, its upper and lower parts are outwardly inclined; after completion of the required thickness of the first stage winding, at the second stage, strip in another size is wound on outer layer of the first stage winding, and then other required thickness of the winding is consecutively achieved in the same way; if it is a seven-stage single frame, then seven sizes of trapezoid strips are required, in addition, the width of the head of latter strip is the same as that of the end of the former and the thickness of each stage winding may not be the same; FIG. 3 is front view of finished single frame; FIG. 4 is section view of cross section of single frame; FIG. 5 is side view of single frame.

(18) (3)

(19) Assembling

(20) A whole amorphous alloy core is made of three identical single frames 2, showing in FIG. 3, and the cross section of two limbs of every single frame 2 is approximate semicircular, which constitutes the approximate circular core limb 3 after combination and fixation of the limbs of three single frames 2; FIG. 7 is vertical view of combined triangular amorphous alloy 3D core; in FIG. 8, 2 indicates upper yoke and 4 indicates lower yoke.

(21) (4)

(22) Annealing

(23) The annealing of the assembled triangular 3D core is finished in annealing oven in order to relieve the internal stress, recover the magnetism, and further improve the performance of core.

(24) (5)

(25) Molding

(26) Tie the combined core limbs with insulation banding tape after aligning of the core to make the core to be a firm entirety, shown in FIG. 8.

(27) FIG. 8 is 3D view of finished triangular amorphous alloy 3D core for transformer. As FIG. 8 illustrates, three single frames form the three core limb, which are in the structure of triangular prism. And the cross sections of core limbs are approximate circular.

(28) The thickness of amorphous alloy material is usually 0.025 mm. It is hard and brittle. This invention adopts special technique, instrument, and equipment in order to overcome the difficulties in slitting amorphous alloy material and manufacture of amorphous alloy 3D core.

(29) The embodiment described above is just the prior one. It should be noticed that for general technical staff in this field, several improvement and modification may be made without departing from the principles of the case, which are also considered as the protection scope of the invention.