CN113809025B - Radiator, thyristor string module and crimping method thereof - Google Patents

Radiator, thyristor string module and crimping method thereof Download PDF

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Publication number
CN113809025B
CN113809025B CN202110928669.7A CN202110928669A CN113809025B CN 113809025 B CN113809025 B CN 113809025B CN 202110928669 A CN202110928669 A CN 202110928669A CN 113809025 B CN113809025 B CN 113809025B
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China
Prior art keywords
thyristor
radiator
clamping piece
positioning holes
insulating baffle
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CN202110928669.7A
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Chinese (zh)
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CN113809025A (en
Inventor
简优宗
杨合民
胡静
王小红
侯凯
原晓琦
吴彦飞
郭海山
程谦
张青杰
隗华荣
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NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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Priority to CN202110928669.7A priority Critical patent/CN113809025B/en
Publication of CN113809025A publication Critical patent/CN113809025A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367Cooling facilitated by shape of device
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/40Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
    • H01L23/4006Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs with bolts or screws
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/40Mountings or securing means for detachable cooling or heating arrangements ; fixed by friction, plugs or springs
    • H01L23/4093Snap-on arrangements, e.g. clips

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The invention discloses a radiator, a thyristor string module using the radiator and a crimping method thereof, wherein at least one group of positioning holes are arranged on a crimping surface of the radiator, which is in contact with a thyristor, each group of positioning holes at least comprises two positioning holes, the positioning holes are used for inserting positioning pins, when the thyristor is arranged in the center of the crimping surface, the edges of the positioning holes of the same group are tangent to the edges of the thyristor, and the spacing of the positioning holes of the same group is smaller than the diameter of the thyristor. Adopt the thyristor group cluster module of above-mentioned radiator to adopt the thyristor of wafer shape to rely on the position of two locating pin location thyristors, when guaranteeing that the thyristor can be located the center of radiator, convenient to detach easily fixes a position, guarantees the uniformity of crimping, improves packaging efficiency, is convenient for assemble and dismantle in narrow and small region such as rack simultaneously.

Description

Radiator, thyristor string module and crimping method thereof
Technical Field
The invention relates to the technical field of crimping of power modules, in particular to a radiator, a thyristor string module and a crimping method thereof.
Background
In the high-power converter, a switching device such as a diode, a thyristor, an IGCT, an IEGT and the like is usually a pressure welding device, and the two side pressure radiators of the pressure welding device are used for radiating heat and are used as current-carrying leading-out rows. The group string crimping mode has small space size and high power density, but the technological level requirement is high. In the production assembly and later maintenance processes, the operation level of technicians directly influences the overall construction efficiency and the performance consistency of batch equipment, the sealing performance of the radiator air duct influences the heat dissipation effect to further influence the equipment output, the parallelism of the radiator lead-out row and the external wiring row influences the contact surface size and the mechanical stress of a current-carrying overlap joint surface, and the heating caused by the too small contact surface and the damage caused by the too large mechanical stress are all main factors of equipment faults.
The positioning of the radiator and the thyristor in the current crimping mode is realized by inserting a positioning pin into a central hole, one-point positioning is adopted, the central positioning mode needs to be aligned with the point by the point in the assembly process, and the joint surface of the thyristor and the radiator is difficult to observe and can only be found by trial, so that the efficiency is very low depending on the technical level of operators. In addition, the locating pins are inserted into the thyristors and the radiators, so that all the radiators above the thyristors to be dismantled and the exposed locating pins of the thyristors are required to be lifted for dismantling during maintenance and dismantling of the thyristors, and the realization of the valve group assembled in the screen cabinet is difficult.
Disclosure of Invention
The invention aims to: the invention aims to provide a radiator which can reduce the positioning difficulty of a thyristor and improve the crimping efficiency of a thyristor string module.
Another objective of the present invention is to provide a transistor string module with the above heat sink and a crimping method thereof.
The technical scheme is as follows: the radiator is characterized in that at least one group of positioning holes are formed in a crimping surface, which is in contact with a thyristor, of the radiator, each group of positioning holes at least comprises two positioning holes, the positioning holes are used for inserting positioning pins, when the thyristor is arranged in the center of the crimping surface, the edges of the positioning holes of the same group are tangent to the edges of the thyristor, and the distance between the positioning holes of the same group is smaller than the diameter of the thyristor.
Further, two groups of positioning holes are formed in the crimping surface, and when the first end surface of the thyristor is arranged in the center of the crimping surface, the edges of the first group of positioning holes are tangent to the edges of the thyristor; when the second end face of the thyristor is arranged in the center of the crimping surface, the edge of the second group of positioning holes is tangent to the edge of the thyristor; wherein the area of the first end face is larger than the area of the second end face.
Further, the positioning hole is arranged at one side of the current carrying outlet row facing away from the radiator.
Further, the air inlet and outlet sections of the crimping surface and the radiator are rectangular, and the air inlet and outlet section is perpendicular to the crimping surface.
The invention relates to a transistor group string module, which comprises an upper clamping piece, a lower clamping piece, a connecting piece for connecting the upper clamping piece and the lower clamping piece, a thyristor arranged between the upper clamping piece and the lower clamping piece and the radiator.
Further, the radiator is characterized by further comprising a first insulating baffle and a second insulating baffle, wherein the first insulating baffle and the second insulating baffle are used for adjusting the radiator, the second insulating baffle is arranged on the first insulating baffle, two adjacent sides of the radiator are respectively tightly attached to the first insulating baffle and the second insulating baffle, a vent hole is formed in the first insulating baffle, and the thyristor is in a cake shape.
Further, the connecting piece is a pull rod, and the pull rod is connected with the upper clamping piece and the lower clamping piece through bolts.
Further, the upper clamping piece is connected with the lower clamping piece through four mutually parallel pull rods.
Further, an elastic piece is arranged between the bolt and the upper clamping piece.
Further, the elastic piece is a belleville spring.
The invention relates to a crimping method of a thyristor string module, which specifically comprises the following steps:
1) Fixing a first insulating baffle, a second insulating baffle and a lower clamping piece on the jig;
2) Placing a radiator, and enabling the edge of the radiator to be tightly attached to the first insulating baffle and the second insulating baffle;
3) Inserting locating pins into a group of locating holes on a crimping surface of the radiator, which needs to be clung to the thyristor;
4) Pushing the thyristor from one side of the radiator until the edge of the thyristor is tightly attached to the positioning pin;
5) Repeating steps 2) through 4) until all thyristors (200) are in close contact with the locating pins on the corresponding heat sink (100), and all edges of the heat sink (100) are in close contact with the first insulating barrier (300) and the second insulating barrier (310);
6) And placing the upper clamping piece, connecting the upper clamping piece with the lower clamping piece through a connecting piece, and adjusting the connecting piece to enable the pressure between the upper clamping piece and the lower clamping piece to reach the required value of the module.
The beneficial effects are that: compared with the prior art, the invention has the following advantages:
1. The double locating pins locate the position of the thyristor, so that the thyristor can be located in the center of the radiator, and meanwhile, the thyristor is convenient to detach, easy to locate and ensures the consistency of crimping.
2. The sections of the radiator are positioned on the same plane through the baffle, so that air leakage of the air duct baffle is avoided, and the small-area contact of the leading-out row and the external connecting row is avoided, and the heating value is increased.
Drawings
FIG. 1 is a top view of a heat sink according to a first embodiment of the present invention;
FIG. 2 is a top view of a heat sink according to a second embodiment of the present invention;
Fig. 3 is a top view illustrating a transistor string module according to an embodiment of the present invention;
fig. 4 is a side view of a transistor string module according to an embodiment of the invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, according to the heat sink of the embodiment of the present invention, a string module for a thyristor 200 is provided with at least one set of positioning holes on a pressure contact surface contacting the thyristor 200, where the pressure contact surface is an upper end surface or a lower end surface of the heat sink, and each set includes at least two positioning holes. When the thyristor 200 is disposed in the center of the crimping face, the edges of the positioning holes of the same group are tangential to the edges of the thyristor 200, and the spacing between the positioning holes in the same group is smaller than the diameter of the thyristor 200.
According to the radiator of the technical scheme, when the radiator is used for the thyristor string module, the locating pins are inserted into the locating holes belonging to the same group, the thyristor 200 can be pushed into the radiator 100 in the mode shown in fig. 1, and as the thyristor 200 is in a cake shape, when the thyristor 200 is closely attached to the locating pins, the thyristor 200 can be just located in the center of the radiator 100, and compared with the traditional locating pins penetrating through the thyristor 200 are arranged in the center of the thyristor 200, the installation efficiency is high, the installation consistency is high, and the fault tolerance is high without observing the crimping surface of the thyristor 200 and the radiator 100. Compared with the single-point positioning by adopting the positioning pin penetrating through the thyristor 200, the positioning pin is not required to be disassembled during disassembly, and the pressure between the clamping pieces at the two ends is regulated, so that the assembly and the replacement in a narrow space such as a cabinet are facilitated.
In practice, in order to facilitate distinguishing the polarity of the thyristor 200, the end faces of the two ends of the thyristor 200 are generally larger and smaller, so correspondingly, referring to fig. 2, the crimping face of the heat sink 100 is provided with two sets of positioning holes, and when the larger first end face of the thyristor 200 contacts the crimping face of the heat sink 100, the edges of the first set of positioning holes 110 are tangential to the edges of the thyristor 200; when the smaller second end face of the thyristor 200 is in contact with the crimped face of the heat sink 100, the edges of the second set of locating holes 120 are tangential to the edges of the thyristor 200. In use, the positioning pins can be inserted into the first set of positioning holes 110 or the second set of positioning holes 120 according to actual conditions.
Because in the thyristor string module, when the rotation angles of the radiator 100 are inconsistent, air leakage occurs at the air duct baffle of the radiator 100, and the contact surface between the current-carrying lead-out row of the radiator 100 and the external copper bar becomes small, so that mechanical stress is concentrated, and the heating value is increased. Therefore, to overcome the above problems, the radiator 100 is preferably a regular rectangular radiator 100, the pressure contact surface and the air inlet and outlet cross section are rectangular, and the air inlet and outlet cross section is perpendicular to the pressure contact surface, so that the angles of the radiator 100 of the serial module are consistent by means of the baffle plate and other components. Meanwhile, in order to facilitate the close fitting of the external tool and the radiator 100, the external tool does not block the placement of the thyristor 200, the positioning hole is preferably arranged on one side of the back current carrying lead-out row, the external tool can be tightly fitted with the side of the back current carrying lead-out row to adjust the rotation angle of the radiator 100 of the whole module to be consistent, and the thyristor 200 can be pushed into one side of the back current carrying lead-out row to be fitted with the positioning pin to realize positioning.
Referring to fig. 3 and 4, the thyristor 200 string module according to the embodiment of the invention includes an upper clip 400, a lower clip 410, a connecting member connecting the upper clip 400 and the lower clip 410, and the radiator 100 and the thyristor 200 disposed between the upper clip 400 and the lower clip 410, wherein the thyristor 200 is in a wafer shape. The radiator further comprises a first insulating baffle 300 and a second insulating baffle 310, wherein the second insulating baffle 310 is arranged on the first insulating baffle 300, and two adjacent side edges of the radiator 100 are respectively and tightly attached to the first insulating baffle 300 and the second insulating baffle 300, so that the radiator 100 is positioned. The connecting piece is used for connecting the upper clamping piece 400 and the lower clamping piece 410, and simultaneously, the pressure between the upper clamping piece 400 and the lower clamping piece 410 can be adjusted, so that the radiator 100 and the thyristor 200 are connected in series and pressed to form the converter valve group. The connection may be a tie 420 or a fastening strap.
Referring to fig. 4, in the present embodiment, the upper clamp 400 and the lower clamp 410 are connected by four parallel tie rods 420, the tie rods 420 are connected to the upper clamp 400 and the lower clamp 410 by bolts 421, and elastic members 422 are disposed between the upper clamp 400 and the bolts 421 so as to adjust the pressure between the upper clamp 400 and the lower clamp 410, and the elastic members 422 are belleville springs.
Referring to fig. 3, the transistor string module according to the embodiment of the present invention may be press-assembled by the following method:
1) The first insulating baffle 300, the second insulating baffle 310 and the lower clamping piece 410 are fixed on the jig;
2) Placing the heat sink 100 such that the edge of the heat sink 100 is closely attached to the first insulating barrier 300 and the second insulating barrier 310;
3) Inserting positioning pins into a group of positioning holes on the crimping surface of the radiator 100, which needs to be clung to the thyristor 200;
4) Pushing the thyristor 200 in from one side of the radiator 100 until the edge of the thyristor 200 is tightly attached to the positioning pin;
5) Repeating steps 2) through 4) until all thyristors (200) are in close contact with the locating pins on the corresponding heat sink (100), and all edges of the heat sink (100) are in close contact with the first insulating barrier (300) and the second insulating barrier (310);
6) The upper clamp 400 is placed, and the upper clamp 400 and the lower clamp 410 are connected by a connecting member, and the connecting member is adjusted so that the pressure between the upper clamp 400 and the lower clamp 410 reaches a desired value of the module.
In this embodiment, since the selected radiator 100 is rectangular, the first insulating baffle 300 and the second insulating baffle 310 are perpendicular to each other, during assembly, the current-carrying lead-out row of the radiator 100 is pushed back to the two baffles between the two baffles, so that two adjacent right-angle edges of the radiator 100 are attached to the first insulating baffle 300 and the second insulating baffle 310, and the rotation angle of the radiator 100 can be consistent, so as to avoid mechanical stress, influence the service life of the module, ensure that the contact surface of the current-carrying lead-out row and the external contact surface is consistent, heat is not easy to generate, and avoid air leakage of the air duct baffle and influence the heat dissipation performance.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of protection thereof, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: various changes, modifications, or equivalents may be made to the particular embodiments of the invention by those skilled in the art after reading the present disclosure, but such changes, modifications, or equivalents are within the scope of the invention as defined in the appended claims.

Claims (6)

1. The thyristor string module is characterized by comprising an upper clamping piece (400), a lower clamping piece (410), a connecting piece for connecting the upper clamping piece (400) and the lower clamping piece (410), and a thyristor (200) and a radiator (100) which are arranged between the upper clamping piece (400) and the lower clamping piece (410); two groups of positioning holes are formed in a crimping surface, which is in contact with the thyristor (200), of the radiator (100), the positioning holes are used for inserting positioning pins, when the thyristor (200) is arranged in the center of the crimping surface, the edges of the same group of positioning holes are tangent to the edges of the thyristor (200), and the distance between the same group of positioning holes is smaller than the diameter of the thyristor (200);
When the first end face of the thyristor (200) is arranged in the center of the crimping face, the edge of the first group of positioning holes (110) is tangential to the edge of the thyristor (200); when the second end face of the thyristor (200) is arranged in the center of the crimping surface, the edges of the second group of positioning holes (120) are tangent to the edges of the thyristor (200); wherein the area of the first end face is larger than the area of the second end face;
The positioning hole is arranged at one side of the current carrying outlet row facing away from the radiator (100);
The air inlet and outlet sections of the crimping surface and the radiator are rectangular, and the air inlet and outlet section is perpendicular to the crimping surface; the thyristor string module is characterized by further comprising a first insulating baffle (300) and a second insulating baffle (310) which are used for adjusting the radiator (100), wherein the second insulating baffle (310) is arranged on the first insulating baffle (300), two adjacent sides of the radiator (100) are respectively tightly attached to the first insulating baffle (300) and the second insulating baffle (310), a vent hole is formed in the first insulating baffle (300), and the thyristor (200) is in a cake shape.
2. The transistor string module according to claim 1, wherein the connection member is a pull rod (420), and the pull rod (420) is connected to the upper clip member (400) and the lower clip member (410) by bolts (421).
3. The thyristor string module according to claim 2, wherein the upper clip (400) and the lower clip (410) are connected by four parallel tie bars (420).
4. The thyristor string module according to claim 2, wherein an elastic member (422) is provided between the bolt (421) and the upper clip member (400).
5. The transistor string module according to claim 4, wherein the elastic member (422) is a belleville spring.
6. A method of crimping a transistor string module according to claim 1, comprising the steps of:
1) Fixing a first insulating baffle (300), a second insulating baffle (310) and a lower clamping piece (410) on the jig;
2) Placing the radiator (100) so that the edge of the radiator (100) is tightly attached to the first insulating baffle (300) and the second insulating baffle (310);
3) Positioning pins are inserted into a group of positioning holes on a crimping surface, which is needed to be clung to the thyristor (200), of the radiator (100);
4) Pushing the thyristor (200) in from one side of the radiator (100) until the edge of the thyristor (200) is tightly attached to the positioning pin;
5) Repeating steps 2) through 4) until all thyristors (200) are in close contact with the locating pins on the corresponding heat sink (100), and all edges of the heat sink (100) are in close contact with the first insulating barrier (300) and the second insulating barrier (310);
6) And placing the upper clamping piece (400), connecting the upper clamping piece (400) with the lower clamping piece (410) through a connecting piece, and adjusting the connecting piece to enable the pressure between the upper clamping piece (400) and the lower clamping piece (410) to reach the required value of the module.
CN202110928669.7A 2021-08-13 2021-08-13 Radiator, thyristor string module and crimping method thereof Active CN113809025B (en)

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