CN-122025366-A - High-strength amorphous alloy three-dimensional coiled iron core transformer

Abstract

The invention provides a high-strength amorphous alloy three-dimensional wound iron core transformer, which comprises three groups of iron core columns with equilateral triangle closed structures, wherein the three groups of iron core columns are sequentially spliced and connected to form a symmetrical three-phase magnetic circuit, the iron core columns are prepared by winding an amorphous alloy strip, the surface of the amorphous alloy strip is coated with a reinforcing layer, the three groups of iron core columns with the equilateral triangle closed structures are spliced to form the symmetrical three-phase magnetic circuit, and the problems of low mechanical strength, asymmetric magnetic circuit and low space utilization rate of the amorphous alloy transformer are jointly solved by combining the iron core columns wound by the amorphous alloy strip and the reinforcing layer coated on the surface of the iron core columns.

Inventors

• GAO YANFEI
• Gao Gun
• XIE XIAOJUN
• Cao Tianfei
• LIU WEIJUN
• ZHANG HAO
• Bi Ziming
• KANG YONGJIE

Assignees

• 华能陕西发电有限公司
• 华能陕西发电有限公司新能源分公司
• 西安热工研究院有限公司
• 华能陕西榆阳电力有限公司

Dates

Publication Date

20260512

Application Date

20260326

Claims (10)

1. 1. The high-strength amorphous alloy three-dimensional wound iron core transformer is characterized by comprising three groups of iron core columns with equilateral triangle closed structures, wherein the three groups of iron core columns are sequentially spliced and connected to form a symmetrical three-phase magnetic circuit; the iron core column is prepared by winding an amorphous alloy strip; the surface of the amorphous alloy strip is coated with a reinforcing layer.
2. 2. The high strength amorphous alloy solid wound core transformer of claim 1, wherein the thickness of the reinforcing layer is 5-10 μm.
3. 3. The high strength amorphous alloy solid wound core transformer of claim 1, wherein the reinforcing layer is a nanocrystalline reinforced epoxy coating.
4. 4. The high strength amorphous alloy three-dimensional wound core transformer of claim 1, wherein the outer surface of the core limb is wound with a carbon fiber prepreg tape protective layer.
5. 5. The high-strength amorphous alloy three-dimensional wound core transformer according to claim 4, wherein the preparation method of the carbon fiber prepreg tape protective layer comprises the following steps: Winding the carbon fiber prepreg tape on the surface of the iron core column by adopting tension of 80-120N to form a carbon fiber prepreg tape layer; And curing the carbon fiber prepreg tape layer at 120-150 ℃ to obtain the carbon fiber prepreg tape protective layer.
6. 6. The high strength amorphous alloy three-dimensional wound core transformer of claim 1, wherein the two ends of the three-phase core limb are fixedly connected by clamping pieces.
7. 7. The high strength amorphous alloy three-dimensional wound core transformer of claim 6, wherein a silicone rubber cushion is disposed between the core leg and the clip.
8. 8. The high strength amorphous alloy solid wound core transformer of claim 6, wherein the clip is an aluminum alloy clip.
9. 9. The high strength amorphous alloy space-time wound core transformer of claim 1, wherein each leg is wound with a winding.
10. 10. The high strength amorphous alloy solid wound core transformer of claim 1, wherein the amorphous alloy strip thickness is 0.020-0.025mm.

Description

High-strength amorphous alloy three-dimensional coiled iron core transformer Technical Field The invention belongs to the technical field of power transformers, and particularly relates to a high-strength amorphous alloy three-dimensional coiled iron core transformer. Background Amorphous alloys are widely used in the manufacture of high efficiency energy saving distribution transformer cores due to their unordered atomic arrangement, very low hysteresis and eddy current losses. The traditional amorphous alloy transformer mostly adopts a planar winding type iron core structure, and has the following defects: the amorphous alloy strip has high brittleness, and is easy to generate cracks due to vibration or impact in transportation, installation and operation, so that no-load loss is increased; The magnetic circuit is asymmetric, namely, the lengths of three-phase magnetic circuits of a planar structure are unequal, so that the three-phase exciting currents are unbalanced; The space utilization rate is low, and the filling coefficient of the laminated or plane winding structure is low, so that the transformer is large in volume. Although a three-dimensional wound core structure (such as a triangular closed core) is proposed to improve the symmetry of a magnetic circuit, an amorphous alloy strip in the prior art is easy to break due to concentrated bending stress during three-dimensional winding, and an effective mechanical reinforcement scheme is lacking, so that engineering application of the amorphous alloy strip is limited. Disclosure of Invention The invention aims to provide a high-strength amorphous alloy three-dimensional wound core transformer, which solves the problems of insufficient mechanical strength, asymmetric magnetic circuit and low space utilization rate of an amorphous alloy iron core, and simultaneously maintains the characteristic of ultralow no-load loss. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention provides a high-strength amorphous alloy three-dimensional wound iron core transformer which comprises three groups of iron core columns of an equilateral triangle closed structure, wherein the three groups of iron core columns are sequentially spliced and connected to form a symmetrical three-phase magnetic circuit; the iron core column is prepared by winding an amorphous alloy strip; the surface of the amorphous alloy strip is coated with a reinforcing layer. Preferably, the thickness of the reinforcing layer is 5-10 μm. Preferably, the reinforcing layer is a nanocrystalline reinforced epoxy coating. Preferably, the outer surface of the iron core limb is wound with a carbon fiber prepreg tape protective layer. Preferably, the preparation method of the carbon fiber prepreg tape protective layer comprises the following steps: Winding the carbon fiber prepreg tape on the surface of the iron core column by adopting tension of 80-120N to form a carbon fiber prepreg tape layer; And curing the carbon fiber prepreg tape layer at 120-150 ℃ to obtain the carbon fiber prepreg tape protective layer. Preferably, both ends of the three-phase iron core column are fixedly connected through clamping pieces. Preferably, a silicone rubber buffer pad is arranged between the iron core limb and the clamping piece. Preferably, the clip is an aluminum alloy clip. Preferably, a winding is wound around each leg. Preferably, the amorphous alloy ribbon has a thickness of 0.020 to 0.025mm. Compared with the prior art, the invention has the beneficial effects that: According to the high-strength amorphous alloy three-dimensional wound core transformer provided by the invention, three groups of iron core columns with equilateral triangle closed structures are spliced to form the symmetrical three-phase magnetic circuit, and the problems of low mechanical strength, asymmetric magnetic circuit and low space utilization rate of the amorphous alloy transformer are jointly solved by combining the iron core columns wound by the amorphous alloy strip and the reinforcing layers coated on the surfaces of the iron core columns. The equilateral triangle structure ensures the symmetry of a magnetic circuit, reduces the unbalance of three-phase no-load current, the amorphous alloy strip keeps low-loss characteristic, and the surface reinforcing layer remarkably improves the mechanical strength and the impact resistance of the amorphous alloy material and prevents the amorphous alloy material from brittle fracture in the process of winding, transportation and operation, thereby enhancing the reliability and the durability of the integral structure while maintaining high efficiency and energy saving, and realizing the design of a transformer with high strength, low loss and compact structure. Furthermore, the coating layer formed by the carbon fiber prepreg tapes improves the impact resistance of the iron core by more than 3 times and meets the requirement of GB/T1094.12 vibr