Search

CN-224232460-U - Clip and transformer

CN224232460UCN 224232460 UCN224232460 UCN 224232460UCN-224232460-U

Abstract

The application discloses a clamping piece and a transformer, and relates to the technical field of transformer equipment, wherein the clamping piece comprises a clamping plate body, a magnetic conduction groove is concavely arranged on the surface of the clamping plate body, the length direction of the magnetic conduction groove is parallel to the length direction of the clamping plate body, the width of the magnetic conduction groove at a notch is a first width, the width of the magnetic conduction groove at the bottom of the groove is a second width, and the first width is larger than the second width. The technical scheme provided by the application aims to weaken the eddy current effect of the clamping piece, thereby improving the working efficiency and the service life of the transformer.

Inventors

  • WANG LONGYANG

Assignees

  • 合肥阳光电气设备有限公司

Dates

Publication Date
20260512
Application Date
20250515

Claims (10)

  1. 1. The clamping piece is applied to a transformer and is characterized by comprising a clamping plate body (100), wherein a magnetic conduction groove (110) is concavely formed in the surface of the clamping plate body (100), the length direction of the magnetic conduction groove (110) is parallel to the length direction of the clamping plate body (100), the width of the magnetic conduction groove (110) at a notch is a first width d1, the width of the magnetic conduction groove (110) at the bottom of the groove is a second width d2, and the first width d1 is larger than the second width d2.
  2. 2. A clip as defined in claim 1, wherein the first width d1 is 1.5 times to 2 times the second width d 2.
  3. 3. A clip according to claim 1, wherein the magnetically permeable slot (110) has a trapezoidal cross section.
  4. 4. The clip according to claim 1, wherein the magnetically permeable slots (110) are distributed in a plurality along a width direction of the clamping plate body (100).
  5. 5. A clip as defined in claim 4, wherein the sum of the first widths D1 of the magnetically permeable slots (110) is 40% to 60% of the width D of the clamping plate body (100).
  6. 6. A clip according to claim 4, wherein the number of magnetically permeable slots (110) is 2 to 4.
  7. 7. A clip according to claim 1, wherein the magnetically permeable slot (110) has a slot depth h1 of 20% to 40% of the thickness h2 of the clamping plate body (100).
  8. 8. A clamping member as claimed in claim 1, wherein the magnetically permeable slots (110) extend through the sides of the clamping plate body (100).
  9. 9. The clip according to any one of claims 1 to 8, wherein the clamping plate body (100) is provided with an abutment surface (120) for abutting against the core (12), the magnetically permeable slot (110) being formed in the abutment surface (120), the clip further comprising a plurality of reinforcing plates (200) standing on opposite sides of the abutment surface (120).
  10. 10. A transformer, characterized by comprising a core (12) and a clamp (13) according to any one of claims 1 to 9, said core (12) being clamped between two of said clamps (13).

Description

Clip and transformer Technical Field The application relates to the technical field of transformer equipment, in particular to a clamping piece and a transformer. Background In transformers, the clips are typically made of a metallic material for securing the laminations and supporting windings. However, when the transformer works, the clamping piece is in an alternating leakage magnetic field, and because the metal material can generate eddy current due to electromagnetic induction, energy loss and local temperature rise are caused, and the working efficiency and the service life of the transformer are affected. Disclosure of utility model The application mainly aims to provide a clamping piece and a transformer, aiming at weakening the eddy current effect of the clamping piece, thereby improving the working efficiency and the service life of the transformer. In order to achieve the above purpose, the clamping piece provided by the application comprises a clamping plate body, wherein the surface of the clamping plate body is concavely provided with a magnetic conduction groove, the length direction of the magnetic conduction groove is parallel to the length direction of the clamping plate body, the width of the magnetic conduction groove at a notch is a first width, the width of the magnetic conduction groove at the groove bottom is a second width, and the first width is larger than the second width. In one embodiment, the first width is 1.5 times to 2 times the second width. In one embodiment, the cross section of the magnetic conduction groove is trapezoid. In an embodiment, the magnetic conductive grooves are distributed along the width direction of the clamping plate body. In one embodiment, the sum of the first widths of the magnetic grooves is 40% to 60% of the width of the clamping plate body. In one embodiment, the number of the magnetic conductive grooves is 2 to 4. In an embodiment, the depth of the magnetic conduction groove is 20% to 40% of the thickness of the clamping plate body. In an embodiment, two ends of the magnetic conduction groove penetrate through the side of the clamping plate body. In an embodiment, the clamping plate body is provided with an abutting surface for abutting against the iron core, the magnetic conduction groove is formed in the abutting surface, and the clamping piece further comprises a plurality of reinforcing plates arranged on the abutting surface in a standing mode. The application also provides a transformer which comprises an iron core and the clamping pieces, wherein the iron core is clamped between the two clamping pieces. According to the technical scheme, the magnetic conduction grooves are concavely formed in the surface of the clamping plate body, so that the continuous structure of the surface of the clamping plate body is changed into an intermittent structure, and the diffusion of magnetic leakage and the concentration of eddy currents can be restrained. The width of the magnetic conduction groove at the notch is larger than that of the magnetic conduction groove at the groove bottom, on one hand, the current is not easy to cross the notch of the magnetic conduction groove due to the fact that the width of the magnetic conduction groove at the notch is larger, and is forced to flow along the groove wall of the magnetic conduction groove, the total resistance of a current path can be increased, the size and the range of vortex can be effectively limited, and on the other hand, the side wall of the magnetic conduction groove can be obliquely extended, so that the current flowing path is prolonged, the complexity of the current flowing path is increased, and the formation of vortex is further limited. The extending direction of the magnetic conduction groove is parallel to the length direction of the clamping piece, namely, the extending direction of the magnetic conduction groove and the arrangement direction of the iron core lamination are greatly staggered, so that the complexity of the flowing path of current between the iron core and the clamping piece is increased, and the formation of vortex is further limited. Therefore, the magnetic conduction groove is concavely arranged on the surface of the clamping plate body, the magnetic conduction groove is convenient to process, low in cost and basically free of additional maintenance, the diffusion of magnetic leakage and the concentration of vortex can be effectively restrained, the vortex effect of the clamping piece is weakened, and therefore the working efficiency and the service life of the transformer are improved. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may b