Search

EP-4266362-B1 - COMPRESSING STRUCTURE, POWER MODULE AND A METHOD FOR COMPRESSING A COMPONENT INSIDE A CHAMBER

EP4266362B1EP 4266362 B1EP4266362 B1EP 4266362B1EP-4266362-B1

Inventors

  • LAN, LIN
  • RONG, Jing
  • ZHANG, WEIQIANG

Dates

Publication Date
20260506
Application Date
20230303

Claims (15)

  1. A compressing structure (1) for compressing a component (3), wherein the compressing structure (1) is provided for compressing a component (3) to a fixed plate (21), the compressing structure (1) comprising: a plate-shaped structure (11), comprising a first surface (111) and a second surface (112) disposed opposite to each other, and a side surface (113) connected between the first surface (111) and the second surface (112), the component (3) is fixed on the first surface (111) of the plate-shaped structure (11) and the plate-shaped structure (11) is provided with a base (12) on the outside; at least a steering compressing member (13) is provided between the second surface (112) of the plate-shaped structure (11) and the base (12), and is mounted on the second surface (112) of the plate-shaped structure (11) or the base (12), the steering compressing member (13) is provided for transforming an external rotational motion around a first rotation axis (m) into a translational motion along a first direction (l-l), in which the first direction (l-l) is perpendicular to the second surface (112) of the plate-shaped structure (11), and the extension direction of the first rotation axis (m) is perpendicular to the first direction (l-l); characterised in that at least a positioning device (14) mounted on the side surface (113) of the plate-shaped structure (11) and the base (12), such that the plate-shaped structure (11) has a degree of freedom of rotating around a second rotation axis (n) relative to the base (12), the extension direction of the second rotation axis (n) is a second direction (o-o) perpendicular to the first direction (l-l).
  2. The compressing structure (1) according to claim 1, the compressing structure (1) is disposed inside a chamber of a housing (2) for compressing the component (3) inside the chamber, and the housing (2) comprises four side walls which are sequentially connected to form the chamber; the fixed plate (21) is disposed inside the chamber, and dividing the chamber into a first space (22) and a second space (23); or the fixed plate (21) is one of the side walls.
  3. The compressing structure (1) according to claim 2, each steering compressing member (13) comprising: a compressing mechanism housing (131) comprising a slope (1311) and a threaded hole (1312); a transmission slanted block (132) fitting with the slope (1311) of the compressing mechanism housing (131); a fastening bolt (133) passing through the threaded hole (1312) of the compressing mechanism housing (131) and abutting on the transmission slanted block (132); and a press-fit plate (134) mounted on the side of the transmission slanted block (132) away from the compressing mechanism housing (131); wherein, when the fastening bolt (133) is rotated along the first rotation axis (m), the fastening bolt (133) moves along the extension direction of the first rotation axis (m) to push the transmission slanted block (132) slides along the slope (1311) of the compressing mechanism housing (131) such that the press-fit plate (134) contacts with the side walls of the housing (2) to produce a compressing force.
  4. The compressing structure (1) according to claim 3, the steering compressing member (13) further comprising a motion positioning block (135), a pin (136) and a first spring (137), wherein, the transmission slanted block (132) and the motion positioning block (135) are disposed on both sides of the slope (1311) of the compressing mechanism housing (131) respectively and connected by the pin (136); an empty slot (1313) is provided on the slope (1313) of the compressing mechanism housing (131) and the pin (136) is disposed through the empty slot (1313); a groove (1321) corresponding to the empty slot (1313) is provided on the contact slope of the transmission slanted block (132), where the transmission slanted block (132) and the slope (1313) of the compressing mechanism housing (131) fitting with, and a pin hole (1322) is provided on one end inside the groove (1321) in which the pin (136) is disposed; the first spring (137) is provided between the pin hole (1322) and another end of the groove for providing a reset force for the sliding of the transmission slanted block (132).
  5. The compressing structure (131) according to claim 4, the steering compressing member (13) further comprising a press-fit rod (138) and a second spring (139); the transmission slanted block (132) and the press-fit plate (134) are connected by the press-fit rod (138), which passes through the transmission slanted block (132) and is threaded connected with the press-fit plate (134); the second spring (139) is sleeved on the press-fit rod (138) which is located between the transmission slanted block (132) and the press-fit plate (134); the transmission slanted block (132) is provided for driving the press-fit plate (134), the press-fit rod (138) and the second spring (139) to slide together along the slope (1311) of the compressing mechanism housing (131); when the fastening bolt (133) continues to be rotated along the first rotation axis (m), the press-fit plate (134) compresses the second spring (139) and compresses the plate-shaped structure (11) along the first direction (l-l) until the component (3) is compressed to the fixed plate (21).
  6. The compressing structure (1) according to claim 1, each positioning device (14) comprising a positioning member (141) and a positioning external member (142) correspondingly sleeved outside of the positioning member (141), the second rotation axis (n) is the rotation axis of the positioning member (141), and the second rotation axis (n) is perpendicular to the side surface (113) of the plate-shaped structure (11); wherein, the positioning member (141) is fixed on the side surface (113) of the plate-shaped structure (11) and the positioning external member (142) is fixed on the base (12); or the positioning external member (142) is fixed on the side surface (113) of the plate-shaped structure (11) and the positioning member (141) is fixed on the base (12).
  7. The compressing structure (1) according to claim 6, a first reserved gap (143), which is along the second direction (o-o), and a second reserved gap (144), which is along the radial direction perpendicular to the second direction (o-o), are provided between the positioning external member (142) and the positioning member (141), such that the plate-shaped structure (11) has a degree of freedom of rotating around the second rotation axis (n) and a degree of freedom of rotating around a third rotation axis (r) which extends along a third direction (p-p) perpendicular to the first direction (l-l) and the second direction (o-o).
  8. The compressing structure (1) according to claim 1, a radiating fin is disposed on the plate-shaped structure (11) for heat dissipation.
  9. The compressing structure (1) according to claim 1, the plate-shaped structure (11) and the component (3) are fixed by means of bolting or gluing.
  10. The compressing structure (1) according to claim 2, the base (12) is a separate structural member distinguished from the housing (2), and the base (12) is located between the plate-shaped structure (11) and the side walls of the housing (2), and it is provided with a through-hole (121), from which a press-fit plate (134) of the steering compressing member (13) extends against the side walls of the housing (2), and the base (12) comprising at least a side surface for securing the positioning device (14).
  11. The compressing structure (1) according to claim 2, the base (12) is formed by the side walls of the housing (2), and the plate-shaped structure (11) is mounted on the side walls of the housing (12) through the positioning device (14).
  12. The compressing structure (1) according to claim 1, the number of the steering compressing member (13) is two, and the two steering compressing members (13) are disposed on upper and lower ends of the plate-shaped structure (11) respectively; or the number of the steering compressing member (13) is one, and the steering compressing member (13) is disposed in the middle of the plate-shaped structure (11).
  13. The compressing structure (1) according to claim 1, the component (3) is a transformer or IGBT.
  14. A power module, wherein the power module comprises a housing (2), a high-voltage circuit (c), a low-voltage circuit (d) and a transformer, wherein, the housing (2) comprising four side walls sequentially connected to form a chamber, and a fixed plate (21) disposed inside the chamber dividing the chamber into a first space (22) and a second space (23); the high-voltage circuit (c) is electrically connected to a primary side of the transformer (a), and the low-voltage circuit (d) is electrically connected to a secondary side of the transformer (b), and the high-voltage circuit (c) and the primary side of the transformer (a) are in the first space (22), and the low-voltage circuit (d) and the secondary side of the transformer (b) are in the second space (23); characterised by fitting the primary side (a) and secondary side (b) of the transformer closely to the fixed plate (21) respectively by adopting the compressing structure (1) as claimed in any one of claims 1-13.
  15. A method for compressing a component (3) inside a chamber of a housing, comprising steps of: providing a compressing structure (1) by adopting the compressing structure (1) as claimed in any one of claims 1-13; disposing the compressing structure (1) inside the chamber of the housing (2), and there are gaps between the component (3) and the fixed plate (21), and between the press-fit plate (134) of the steering compressing member (13) and side walls of the housing (2); inserting a screwdriver (15) through a port of the housing (2) and rotating a fastening bolt (133), such that the fastening bolt (133) moves along its axial direction to push the transmission slanted block (132) to slide along the slope (1311), then the press-fit plate (134) on the transmission slanted block (132) slides with the transmission slanted block (132) until it fits with the side walls of the housing (2); continuing rotating the screwdriver (15) so that the press-fit plate (134) presses the side walls of the housing (2), thereby a reaction force is generated to push the component (3) to gradually approach the fixed plate (21) until they are in contact.

Description

TECHNICAL FIELD The invention relates to the technical field of power electronics, and specifically to a compressing structure. BACKGROUND Informatization, intellectualization and digitization are the major trend of the development of human society and are vital to improve the competitiveness of the country and enterprises while data centers are also experiencing explosive growth as infrastructure. In the meantime, massive amount of data storage and computing requirements puts forward higher requirements for power supply, space management and heat dissipation of the data center. As an important part of the data center, power distribution systems are of great significance to ensure the reliable operation of data center, and realizing high power density of the power distribution system is the breakthrough point of data center performance improvement. As the core component of the power distribution system, power modules are an important part in effectively reducing the volume of the power distribution system and improving the reliability of system. The primary side and the secondary side of the transformer are generally entirely covered with insulating material, the volume of which is large, and the heat dissipation is difficult due to poor thermal conductivity of insulating materials. Adopting split type transformer can effectively reduce the volume of the transformer and a fan can blow directly to a magnetic core body and windings of the primary side and secondary side of the transformer so that the heat dissipation capability is improved thereof. However, when the transformer is applied to medium and high voltage power modules, the primary side and secondary side of the transformer need to be fixed in the insulating housing. The operating space inside the chamber of the housing is small and installation and positioning is difficult which makes it difficult to realize the fixation and clamping of the transformer; and a gap exists between a fixed plate and the magnetic core because of manufacturing or assembly errors which affects the excitation inductance value of the transformer. Referring to the patent document (US H0000906 H1), the prior art discloses a wedge assembly that can be easily installed between two surfaces that are to be positioned at a selected separation distance. Referring to the patent document (US 20180153046 A1), the prior art discloses a device for installing a high and low voltage conversion circuit. The device for the high and low voltage conversion circuit includes a first shell made of an insulation material and a second shell made of a metal material, wherein each of the first shell and the second shell is provided with two openings at two ends along the same direction; the first shell and the second shell are fixed together and are contacted at least with partial surfaces; a first cavity formed in the first shell is used for installing a high voltage circuit, and a high voltage terminal connected with the high voltage circuit passes through one above opening in the first shell; a second cavity formed in the second shell is used for installing a low voltage circuit, and a low voltage terminal connected with the low voltage circuit passes through one above opening in the second shell; and the first cavity is parallel with the second cavity. SUMMARY In view of above, the invention provides a compressing structure for compressing a component, which compresses the component to a fixed plate. To achieve the above object, embodiments of the invention provides a compressing structure for compressing a component, wherein the compressing structure is provided for compressing a component to a fixed plate, the compressing structure comprising: a plate-shaped structure, comprising a first surface and a second surface disposed opposite to each other, and a side surface connected between the first surface and the second surface, the component is fixed on the first surface of the plate-shaped structure and the plate-shaped structure is provided with a base on the outside; at least a steering compressing member is provided between the second surface of the plate-shaped structure and the base, and is mounted on the second surface of the plate-shaped structure or the base, the steering compressing member is provided for transforming an external rotational motion around a first rotation axis into a translational motion along a first direction, in which the first direction is perpendicular to the second surface of the plate-shaped structure, and the extension direction of the first rotation axis is perpendicular to the first direction; and at least a positioning device mounted on the side surface of the plate-shaped structure and the base, such that the plate-shaped structure has a degree of freedom of rotating around a second rotation axis relative to the base ,the extension direction of the second rotation axis is a second direction perpendicular to the first direction. In one or more embodiments of