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CN-122025388-A - Energy-saving direct current converter transformer

CN122025388ACN 122025388 ACN122025388 ACN 122025388ACN-122025388-A

Abstract

The invention relates to the technical field of direct current converter transformers, in particular to an energy-saving direct current converter transformer. Including the shell, be equipped with frame and iron core and a plurality of winding in the shell, every winding outside Zhou Jun cover is equipped with the telescopic alloy cover that comprises two symmetrical interior alloy plates, all is equipped with radiating fin between the adjacent winding and the fringe winding outside, and every interior alloy plate outside all is equipped with the outer alloy plate that can follow winding axis direction and remove, a plurality of holes have been seted up on interior alloy plate surface, outer hole has been seted up to outer alloy plate correspondence, the position that corresponds every winding on the frame all integrates hall sensor. According to the invention, the heat dissipation and shielding states are intelligently switched through the dynamic composite shielding cover, and the heat dissipation guide plate and the inner and outer parallel cooling tube groups are combined to construct the efficient composite cooling loop, so that the heat is timely conducted out under all working conditions while the magnetic leakage is restrained, the eddy current loss is reduced, and the energy conservation, the heat dissipation and the operation safety are effectively considered.

Inventors

  • HOU YONGHUI
  • LIU WENFANG
  • ZHANG BAOJIAN
  • NING LIANG
  • HUANG CHENGWEI
  • ZHANG YUNHONG
  • HU YULIN
  • FU XIANGXUN

Assignees

  • 河南省计量测试科学研究院

Dates

Publication Date
20260512
Application Date
20260116

Claims (10)

  1. 1. An energy-saving direct current converter transformer comprises a shell (1), wherein a frame (2), an iron core (3) fixedly arranged on the frame (2) and a plurality of windings (4) horizontally arranged at intervals along the iron core (3) are arranged in the shell (1); the heat dissipation device is characterized in that a sleeve type alloy cover (5) formed by two symmetrical inner alloy plates (51) is sleeved outside Zhou Jun of each winding (4), and heat dissipation fins (6) fixedly connected with the inner alloy plates (51) are arranged between adjacent windings (4) and outside the edge windings (4); an outer alloy plate (52) capable of moving along the axial direction of the winding (4) is arranged on the outer side of each inner alloy plate (51), a plurality of inner holes (511) are formed in the surface of each inner alloy plate (51), and outer holes (521) are correspondingly formed in the outer alloy plates (52); The upper end of the outer alloy plate (52) is provided with a linear driver for driving the outer alloy plate (52) to axially displace, when the outer hole (521) is aligned with the inner hole (511), a through cooling channel for guaranteeing effective heat dissipation of the winding (4) is formed between the outer hole (521) and the inner hole (511), and when the outer hole (521) is dislocated with the inner hole (511), a closed shielding cavity for inhibiting magnetic leakage diffusion is formed among the inner alloy plate (51), the outer alloy plate (52), the winding (4) and the radiating fins (6); The frame (2) is integrated with a Hall sensor (7) for monitoring the magnetic leakage state of the windings (4) in real time at the position corresponding to each winding (4), and the Hall sensor (7) is electrically connected with the linear driver.
  2. 2. An energy-saving direct current converter transformer according to claim 1, characterized in that the inner side of the inner alloy plate (51) is provided with a plurality of heat dissipation guide fins (61) which are axially equidistantly arranged, and two ends of each heat dissipation guide fin (61) are respectively fixedly connected with corresponding heat dissipation fins (6) to form a heat conduction path.
  3. 3. An energy-efficient direct current converter transformer according to claim 2, characterized in that the heat radiating fins (6) are made of a high heat conducting material, and an inner cooling tube group (62) for actively conducting out the heat inside the closed shielding cavity is embedded inside the heat radiating fins.
  4. 4. An energy efficient direct current converter transformer according to claim 3, characterized in that an outer cooling tube group (63) is arranged in the housing (1) around all windings (4), said outer cooling tube group (63) being connected in parallel with an inner cooling tube group (62) in each cooling fin (6) forming an inner and outer cooperating composite cooling circuit.
  5. 5. An energy-saving direct current converter transformer according to claim 1, characterized in that the upper end and the lower end of each alloy cover (5) are respectively and tightly attached to the end part of the corresponding winding (4), and an annular gap is reserved between the inner wall of each alloy cover (5) and the outer surface of the corresponding winding (4) to form the closed shielding cavity surrounding the circumference of the winding (4).
  6. 6. The energy-saving direct current converter transformer according to claim 5, wherein the inner alloy plate (51) and the outer alloy plate (52) are made of high magnetic permalloy materials, and the inner alloy plate (51) and the outer alloy plate (52) together form a composite shielding cover capable of regulating and controlling the on-off state of the closed shielding cavity.
  7. 7. An energy efficient dc converter transformer according to claim 1, characterized in that the linear drive comprises a stationary electromagnet (512) fixedly arranged at the upper end of the inner alloy plate (51) and a movable electromagnet (522) fixedly arranged at the upper end of the outer alloy plate (52), the inner bore (511) being in coaxial alignment with the outer bore (521) when the stationary electromagnet (512) is electrically attracted to the movable electromagnet (522).
  8. 8. The energy-saving direct current converter transformer according to claim 7, wherein a guide rod (523) vertically extends downwards from the lower end of the outer alloy plate (52), a guide sleeve (5231) for the guide rod (523) to pass through is fixedly arranged at a corresponding position on the frame (2), and a compression spring (5232) for assisting the upper reset of the outer alloy plate (52) is fixedly connected between the guide rod (523) and the guide sleeve (5231).
  9. 9. The energy-saving direct current converter transformer according to claim 8, wherein sliding strips (524) are arranged on two sides of the outer alloy plate (52) along the axial direction of the outer alloy plate, sliding grooves (513) matched with the sliding strips (524) are correspondingly formed on two sides of the inner alloy plate (51), and the sliding strips (524) are slidably clamped in the sliding grooves (513) so as to guide the outer alloy plate (52) to move smoothly along the axial direction of the winding (4) and limit radial offset of the outer alloy plate.
  10. 10. An energy-efficient direct current converter transformer according to claim 1, characterized in that the connection interface between the inner alloy plate (51) and the heat radiating fins (6) and the contact interface between the inner alloy plate (51) and the outer alloy plate (52) are coated with a high heat-conducting insulating sealant to form a dense elastic film layer.

Description

Energy-saving direct current converter transformer Technical Field The invention relates to the technical field of direct current converter transformers, in particular to an energy-saving direct current converter transformer. Background In a high-voltage direct-current transmission system, a direct-current converter transformer is easy to generate a strong leakage magnetic field around a winding due to long-term operation under the complex working conditions of high harmonic content and direct-current magnetic bias, so that significant eddy currents are induced in metal structural members such as an oil tank, clamping pieces and the like, and the additional loss is large, the local overheating is caused, and the energy efficiency is reduced. The prior art lacks real-time and global sensing capability on the magnetic leakage state, is difficult to accurately identify the magnetic leakage winding, causes the magnetic leakage to continuously penetrate through the metal structural member, causes obvious eddy current loss, not only causes energy waste, but also weakens the energy-saving performance of the transformer. The energy-saving direct current converter transformer with the patent number of CN120600492A comprises a heat dissipation shell and a controller, wherein a plurality of groups of winding coils are arranged in the heat dissipation shell, an iron core is arranged in each winding coil, a linkage magnetic leakage processing assembly is arranged at the bottom end of the inner wall of the heat dissipation shell, the linkage magnetic leakage processing assembly comprises an electric cylinder fixedly arranged at the bottom end of the inner wall of the heat dissipation shell, the output end of the electric cylinder is fixedly connected with a push block, the upper surface of the push block is fixedly connected with a linkage strip, two inclined grooves are formed in the inner wall of the linkage strip, each inclined groove is connected with a sleeving column in a sliding manner, guide posts are connected to the inner wall of the sleeving column, permalloy outer covers are connected to the two sides of the winding coils in a sliding manner, and connecting strips are arranged on the outer wall of the permalloy outer covers and are fixedly connected with each connecting strip. According to the patent, the permalloy outer covers on two sides of each winding coil are close to each other and are in contact through the linkage magnetic leakage processing assembly, the outer wall of the winding coil is wrapped to form a closed state, the magnetic leakage problem of a large-area outside the winding coil can be timely processed, the magnetic leakage amount is effectively reduced, the eddy current loss is reduced, the energy loss of a plurality of winding coils is reduced, and high-efficiency energy conservation is realized. However, the structure has the advantages of small moving range of the alloy cover and insufficient heat dissipation during opening due to limited space in the shell. When the transformer is closed, high-precision butt joint is needed, magnetic leakage is easy to occur, cooling oil flow is blocked after the transformer is closed, winding overheating is easy to occur, and shielding effectiveness and heat dissipation reliability are difficult to achieve. Therefore, there is a need for an energy-saving dc converter transformer with both magnetic leakage protection and efficient synergistic heat dissipation. Disclosure of Invention Aiming at the problems existing in the prior art, the energy-saving direct current converter transformer is provided, the heat dissipation and shielding states are intelligently switched through the dynamic composite shielding cover, the heat dissipation guide plate and the inner and outer parallel cooling pipe groups are combined to construct the efficient composite cooling loop, the magnetic leakage is restrained, the eddy current loss is reduced, meanwhile, the timely derivation of heat under all working conditions is ensured, and the energy conservation, the heat dissipation and the operation safety are effectively considered. In order to solve the problems in the prior art, the invention provides an energy-saving direct current converter transformer, which comprises a shell, wherein a frame, an iron core fixedly arranged on the frame and a plurality of windings horizontally arranged at intervals along the iron core are arranged in the shell, sleeve-type alloy covers formed by two symmetrical inner alloy plates are sleeved outside each winding, radiating fins fixedly connected with the inner alloy plates are arranged between adjacent windings and outside the edge windings, outer alloy plates capable of moving along the axial direction of the windings are arranged outside each inner alloy plate, a plurality of inner holes are formed on the surfaces of the inner alloy plates, outer holes are correspondingly formed in the outer alloy plates, a linear driver for driving th