Low-voltage lead structure for three-dimensional wound core of transformer

Abstract

A transformer three-dimensional wound core low-voltage lead structure is provided comprising a three-dimensional wound core formed of three rectangular single frames, and three phase windings. The wound core comprises three core posts and an yoke, the yoke being a triangular structure. The three phase windings are arranged on the three core posts, each phase winding comprising an internal low-voltage and high-voltage winding. The head end and the tail end of each phase low-voltage winding are respectively connected to a lead-out line, and the lead-out lines are located in a triangular structure region of the yoke, and a low-voltage bushing step-up module is provided above the wound core, three low-voltage bushings are provided on the low-voltage bushing step-up module, and the three low-voltage bushings are connected to the lead-out line of the corresponding low-voltage winding.

Claims

1. A novel low-voltage lead structure for a three-dimensional wound core of a transformer, comprising: three-phase windings, and a three-dimensional wound core (1) spliced by three rectangular single frames and comprising three core legs (5) and an iron yoke (6), wherein the iron yoke (6) of the three-dimensional wound core is a triangular structure; the three-phase windings are correspondingly arranged in the three core legs (5); each single-phase winding has an internal low-voltage winding (3) and an external high-voltage winding (8); a head end and a tail end of each single-phase low-voltage winding (3) are respectively connected to a lead-out wire (2); and the lead-out wires (2) of the head end and the tail end of each single-phase low-voltage winding (3) are located in triangular structure regions of the iron yoke (6); a low-voltage bushing ascending base (4) is arranged in the three-dimensional wound core (1); three low-voltage bushings (7) are arranged in the low-voltage bushing ascending base (4); the three low-voltage bushings (7) are connected to the corresponding lead-out wires (2) of the low-voltage windings; and the low-voltage bushing ascending base (4) is located in the triangular structure region of the iron yoke (6).

2. The novel low-voltage lead structure for a three-dimensional wound core of a transformer of claim 1, wherein the three low-voltage bushings (7) are arranged along a straight line.

3. The novel low-voltage lead structure for a three-dimensional wound core of a transformer of claim 1, wherein the lead-out wires at the head ends of the three-phase low-voltage windings (3) and the lead-out wires at the tail ends of the three-phase low-voltage windings (3) are respectively of triangle arrangement.

4. The novel low voltage lead structure for a three-dimensional wound core of a transformer of claim 1, wherein the lead-out wires at the head ends of the three-phase low-voltage windings (3) are arranged at three corner positions formed by the iron yoke (6), and wherein the lead-out wires at the tail ends of the three-phase low-voltage windings (3) are arranged inside the three-phase windings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an exemplary structure diagram according to the disclosure.

DETAILED DESCRIPTION

(2) The disclosure is further described below with reference to the drawing and the embodiments.

(3) As shown in FIG. 1, a novel low-voltage lead structure for a three-dimensional wound core of a transformer according to the disclosure includes a three-dimensional wound core 1 spliced by three rectangular single frames, and three-phase windings, wherein the three-dimensional wound core 1 includes three core legs 5, and an iron yoke 6. The iron yoke 6 of the three-dimensional wound core is a triangular structure. The three-phase windings are correspondingly arranged in the three core legs 5, wherein each single-phase winding includes an internal low-voltage winding 3 and an external high-voltage winding 8. A head end and a tail end of each single-phase low-voltage winding 3 are respectively connected to a lead-out wire 2; and the lead-out wires 2 of the head end and the tail end of each single-phase low-voltage winding 3 are located in triangular structure regions of the iron yoke 6. A low-voltage bushing ascending base 4 is arranged in the three-dimensional wound core 1. Three low-voltage bushings 7 are arranged in the low-voltage bushing ascending base 4, and connected to the corresponding lead-out wires 2 of the low-voltage windings.

(4) The low-voltage bushing ascending base 4 is located in the triangular structure region of the iron yoke 6, in which three low-voltage bushings 7 are arranged along a straight line.

(5) The lead-out wires (a, b and c) at the head ends of the three-phase low-voltage windings 3 and the lead-out wires (x, y and z) at the tail ends of the three-phase low-voltage windings 3 are respectively of triangle arrangement.

(6) The lead-out wires (a, b and c) at the head ends of the three-phase low-voltage windings 3 are arranged at three corner positions formed by the iron yoke 6. The lead-out wires (x, y and z) at the tail ends of the three-phase low-voltage windings 3 are arranged inside the three-phase windings.

(7) It should be appreciated that, the description above does not limit the disclosure, and the disclosure is not limited to the embodiments above. Any variations, modifications, additions or substitutions made by those skilled in the art within a substantial scope of the disclosure shall also fall within the protection scope for the disclosure.