CN219457578U

CN219457578U - Thyristor (T-R)

Info

Publication number: CN219457578U
Application number: CN202320683846.4U
Authority: CN
Inventors: 陈丽蒙
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-01
Anticipated expiration: 2033-03-24

Abstract

The utility model relates to a thyristor, which comprises an integrally formed shell, and a cathode block, a thyristor chip and an anode block which are positioned in the shell, wherein a sealing sleeve is sleeved outside the cathode block, the thyristor chip and the anode block which are sequentially overlapped, and two ends of the sealing sleeve respectively form limit and contact seal for the cathode block and the anode block. The sealing sleeve is additionally arranged to have good sealing effect on the cathode block, the thyristor chip and the anode block.

Description

Thyristor (T-R)

Technical Field

The utility model belongs to the field of power semiconductor devices, and particularly relates to a thyristor.

Background

Thyristors are a type of high power semiconductor device developed on a transistor basis. The advent of thyristors has led to the expansion of semiconductor devices from the weak to the strong regime. The packaging forms of the thyristors mainly comprise ceramic packaging, plastic packaging, metal shell packaging, bolt packaging and flat plate packaging. The medium-and small-current thyristors are mainly packaged by ceramics, plastics and metal shells, and the large-current thyristors are mainly packaged by bolts and plates.

The CN215495U provides a flat-plate thyristor, which comprises an upper lantern ring, a lower lantern ring, a cathode block, a thyristor chip and an anode block, wherein the cathode block and the anode block of the thyristor chip are sequentially overlapped, the upper lantern ring and the lower lantern ring are connected and sleeved outside the cathode block, the thyristor chip and the anode block, and the upper lantern ring forms a limiting effect on the cathode block and the lower lantern ring forms a limiting effect on the anode block so as to keep the three blocks combined; the inner wall of the lower lantern ring is provided with at least one limiting lug, the anode block is provided with a limiting groove matched with the limiting lug, and the limiting lug is matched with the limiting groove to enable the lower lantern ring and the anode block to form a circumferential linkage matching relationship. The above-mentioned packaging structure has the following drawbacks: the upper lantern ring and the lower lantern ring are connected in a split and spliced way, the upper lantern ring and the lower lantern ring are easy to separate under the action of external force, and a sealing structure is not arranged between the upper lantern ring and the lower lantern ring, so that an internal cathode block, a thyristor chip and an anode block are easy to be influenced by external media, and the thyristor has the use problem.

Disclosure of Invention

The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides the thyristor, and the sealing sleeve is additionally arranged to have good sealing effect on the cathode block, the thyristor chip and the anode block.

The technical scheme of the utility model is as follows: the thyristor comprises an integrally formed shell, and a cathode block, a thyristor chip and an anode block which are positioned in the shell, wherein a sealing sleeve is sleeved outside the cathode block, the thyristor chip and the anode block which are sequentially overlapped, and two ends of the sealing sleeve respectively form limit and contact seal for the cathode block and the anode block.

By adopting the technical scheme, the sealing sleeve is sleeved outside the cathode block, the thyristor chip and the anode block, the cathode block and the anode block are respectively limited and contact-sealed through the two ends of the sealing sleeve, the cathode block, the thyristor chip and the anode block can be tightly held and positioned through the sealing sleeve on one hand, the sealing sleeve is sealed on the other hand, the inner structure of the thyristor is effectively prevented from being influenced by external media, and the outer integrated shell is additionally arranged, so that the whole structure of the thyristor is firm, the thyristor is not easy to separate, and the service life of the thyristor is long.

Still further, the present utility model provides: the gate electrode lead wire and the cathode lead wire are further arranged on the cathode block, the inner connecting end of the gate electrode lead wire penetrates through the wire passing channel and then is connected with the gate electrode of the thyristor chip, and the inner connecting end of the cathode lead wire is connected with the cathode block.

Preferably, a plug is further arranged at the outer opening of the wire passing channel, a wire passing hole for the gate electrode lead to pass through is formed in the plug, and the outer diameter of a matching surface of the plug and the inner wall of the wire passing channel is gradually increased.

Preferably, the mating surface on the plug is a conical surface or a spherical surface.

By adopting the above arrangement, the gate lead is convenient to install, and passes through the wire passing hole on the plug, and as the outer diameter of the matching surface of the plug and the inner wall of the wire passing channel is gradually increased, when the plug is continuously plugged into the wire passing channel, the plug is extruded to deform, so that the inner hole of the wire passing hole is reduced, the effect of wrapping and sealing the gate lead by the hole wall of the wire passing hole is achieved, and impurities are effectively prevented from entering.

Still further, the present utility model is provided with: the outer wall of the cathode block is provided with a wiring hole, and the inner end of the cathode lead is arranged in the wiring hole in a penetrating way and is pressed and positioned by a connecting piece.

By adopting the further arrangement, the cathode lead is connected in the hole on the outer wall of the cathode block and is fixed by the connecting piece, and the connection operation is convenient.

Still further, the present utility model is provided with: the inner connecting end of the cathode lead is welded with the outer wall of the cathode block.

By adopting the further arrangement, the cathode lead is directly welded with the cathode block, so that the connection is convenient.

Still further, the present utility model is provided with: the inner rings at the two ends of the sealing sleeve are provided with convex ring parts, and the outer walls of the cathode block and the anode block are provided with limit grooves A matched with the corresponding convex ring parts.

By adopting the arrangement, the convex ring parts on the two ends of the sealing sleeve are respectively positioned in the corresponding limit grooves on the outer walls of the cathode block and the anode block, so that the cathode block, the thyristor chip and the anode block are prevented from being separated, and the cathode block, the thyristor chip and the anode block are tightly held and positioned, so that the installation is convenient.

Drawings

FIG. 1 is a block diagram of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of an embodiment of the present utility model;

FIG. 3 is an internal block diagram of an embodiment of the present utility model;

FIG. 4 is a block diagram of a plug in an embodiment of the utility model;

figure 5 is a cross-sectional view of a sealing boot in an embodiment of the utility model.

In the figure: the device comprises a shell 1, a cathode block 2, a thyristor chip 3, an anode block 4, a sealing sleeve 5, a wire passing channel 21, a plug 8, a wire passing hole 81, a matching surface 82, a wire connecting hole 22, a convex ring part 51 and a limiting groove A.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-5, the thyristor comprises an integrally formed shell 1, and a cathode block 2, a thyristor chip 3 and an anode block 4 which are positioned in the shell 1, wherein a sealing sleeve 5 is sleeved outside the cathode block 2, the thyristor chip 3 and the anode block 4 which are sequentially overlapped, two ends of the sealing sleeve 5 respectively form limit and contact seal on the cathode block 2 and the anode block 4, the inner rings at two ends of the sealing sleeve 5 are provided with convex ring parts 51, the outer walls of the cathode block 2 and the anode block 4 are provided with limit grooves A matched with the corresponding convex ring parts 51, and of course, the sealing sleeve 5 can also be provided with limit grooves A, and the outer walls of the cathode block 2 and the anode block 4 are provided with convex ring parts.

According to the utility model, the sealing sleeve 5 is sleeved outside the cathode block 2, the thyristor chip 3 and the anode block 4, the cathode block 2, the thyristor chip 3 and the anode block 4 are tightly held and positioned by the convex ring parts 51 on the two ends of the sealing sleeve 5 in the corresponding limit grooves A on the outer walls of the cathode block 2 and the anode block 4 respectively, the two ends of the sealing sleeve 5 are contacted and sealed with the cathode block 2 and the anode block 4, the internal structure of the thyristor is prevented from being influenced by external media, and the external integrated shell 1 is added, so that the whole structure of the thyristor is firm, the thyristor is not easy to separate, and the service life of the thyristor is long.

Specifically, the thyristor further comprises a gate electrode lead and a cathode lead, the cathode block 2 is further provided with a wire passing channel 21, the inner connecting end of the gate electrode lead passes through the wire passing channel 21 and then is connected with the gate electrode of the thyristor chip 3, the outer outlet of the wire passing channel 21 is further provided with a plug 8, the plug 8 is provided with a wire passing hole 81 for the gate electrode lead to pass through, the outer diameter of a matching surface of the plug 8 and the inner wall of the wire passing channel 21 is gradually increased, and the matching surface 82 on the plug 8 is a conical surface or a spherical surface; the outer wall of the cathode block 2 is provided with a wiring hole 22, the inner connecting end of the cathode lead is penetrated in the wiring hole 22 and is pressed and positioned by a connecting piece, the connecting piece can be a rivet or a screw connected with the wiring hole 22 in a threaded manner, and the inner connecting end of the cathode lead can be directly welded with the outer wall of the cathode block 2.

When the wire is assembled, the gate electrode lead passes through the wire passing hole 81 on the plug 8, and as the outer diameter of the matching surface 82 on the plug 8 and the inner wall of the wire passing channel 21 is gradually increased, when the plug 8 is continuously plugged into the wire passing channel 21, the plug 8 is extruded to deform, so that the inner hole of the wire passing hole 81 is reduced, the effect of wrapping and sealing the gate electrode lead by the hole wall of the wire passing hole 81 is achieved, and impurities are effectively prevented from entering; the cathode lead is connected to the outer wall of the cathode block 2, and the connection is convenient.

It should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Claims

1. A thyristor, characterized in that: the cathode block (2), the thyristor chip (3) and the anode block (4) which are arranged inside the shell (1) are sequentially overlapped, a sealing sleeve (5) is further sleeved outside the cathode block (2), the thyristor chip (3) and the anode block (4), and two ends of the sealing sleeve (5) are respectively used for limiting and contacting with the cathode block (2) and the anode block (4) to be sealed.

2. A thyristor according to claim 1, wherein: the semiconductor device further comprises a gate electrode lead and a cathode lead, wherein a wire passing channel (21) is further formed in the cathode block (2), the inner connecting end of the gate electrode lead passes through the wire passing channel (21) and then is connected with the gate electrode of the thyristor chip (3), and the inner connecting end of the cathode lead is connected with the cathode block (2).

3. A thyristor according to claim 2, wherein: and a plug (8) is further arranged at the outer opening of the wire passing channel (21), a wire passing hole (81) for the gate electrode lead to pass through is formed in the plug (8), and the outer diameter of a matching surface of the plug (8) and the inner wall of the wire passing channel (21) is gradually increased.

4. A thyristor according to claim 3, wherein: the matching surface (82) on the plug (8) is a conical surface or a spherical surface.

5. A thyristor according to claim 2, wherein: the outer wall of the cathode block (2) is provided with a wiring hole (22), and the inner end of the cathode lead is penetrated in the wiring hole (22) and is pressed and positioned by a connecting piece.

6. A thyristor according to claim 2, wherein: the inner end of the cathode lead is welded with the outer wall of the cathode block (2).

7. A thyristor according to any one of claims 1 to 5, wherein: the inner rings at the two ends of the sealing sleeve (5) are provided with convex ring parts (51), and limit grooves (A) matched with the corresponding convex ring parts (51) are arranged on the outer walls of the cathode block (2) and the anode block (4).