Electrical isolation structure of IGBT module

Abstract

The utility model discloses an electrical isolation structure of an IGBT (Insulated Gate Bipolar Translator) module, which comprises a substrate, an IGBT electrical piece, an absorption capacitor and an isolation piece, and is characterized in that the IGBT electrical piece comprises a body and a connecting part; the body is attached to the substrate. The two connecting parts are matched with the body to form an inserting groove with an outward opening, at least part of the connecting parts are suspended on the substrate, and an accommodating channel is formed between the connecting parts and the substrate; the absorption capacitor is provided with two connecting bars which are respectively suitable for being connected with the positive terminal and the negative terminal; the separator is provided with a partition plate, a first limiting part and a second limiting part, the partition plate is suitable for being inserted into the insertion groove and is configured to form electrical isolation between the positive terminal and the negative terminal when the partition plate is inserted in place, and the first limiting part is suitable for being inserted into the accommodating channel; the second limiting part is suitable for abutting against the two connecting rows when the partition plate is inserted in place so as to limit the isolation piece to move in the direction away from the body. Electrical isolation can be formed between the positive terminal and the negative terminal, the structure is simple, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to an electrical isolation structure of an IGBT module. Background Art

[0002] IGBT modules are commonly used power devices in frequency conversion equipment. There are certain requirements for the electrical clearance and creepage distance between the positive and negative terminals. If the electrical clearance or creepage distance between them is too close or the voltage is abnormal, discharge will occur between the positive and negative terminals and damage the equipment. Similarly, there are certain requirements for the electrical clearance and creepage distance between the two pins of the absorption capacitor. If the electrical clearance or creepage distance between them is too close or the voltage is abnormal, discharge will occur between the two pins and damage the equipment. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology and to provide an electrical isolation structure of an IGBT module, which can form electrical isolation between the positive terminal and the negative terminal and has a simple structure, low cost and convenient installation.

[0004] In order to achieve the above objectives, the present invention and its related embodiments adopt the following technical solutions but are not limited to the following solutions:

[0005] The first technical scheme and its related embodiments relate to an electrical isolation structure of an IGBT module, which includes a substrate; an IGBT electrical component, which includes a body extending in a first direction and two connecting parts protruding from at least one end of the body and arranged at intervals in a second direction; the body is attached to the substrate; the two connecting parts cooperate with the body to form a plug-in slot that opens outward and extends and passes through the third direction, and the connecting part is at least partially suspended from the substrate and forms a accommodating channel with the substrate; the two connecting parts are respectively provided with a positive terminal and a negative terminal; the first direction, the second direction and the third direction are orthogonal to each other; an absorption capacitor, which is provided with two connection rows respectively suitable for connecting with the positive terminal and the negative terminal; and an isolating member, which is provided with a partition, a first limiting portion and a second limiting portion, the partition is suitable for being inserted into the plug-in slot and is configured to form electrical isolation between the positive terminal and the negative terminal when plugged in place, the first limiting portion is suitable for being inserted into the accommodating channel, and the second limiting portion is suitable for abutting against the two connection rows when the partition is plugged in place to limit the movement of the isolating member in a direction away from the body.

[0006] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein an end of the main body close to the connecting portion is further provided with a limiting surface away from the substrate, and the limiting surface is suitable for abutting against the second limiting portion to limit the movement of the isolation member in a direction close to the substrate.

[0007] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein the first limiting portion, the second limiting portion and the partition are connected as a whole, the partition is provided with a protrusion protruding from the second limiting portion, and the limiting surface is also suitable for abutting against the protrusion to limit the movement of the isolation member in the direction close to the substrate.

[0008] The fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein the connecting row includes a first section extending along a first direction and a second section extending along a third direction that are connected to each other, the first section is suitable for connecting to a positive terminal or a negative terminal; the second section is closer to the main body relative to the first section, and the side of the second section facing away from the first section is suitable for abutting against the second limiting portion.

[0009] The fifth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the first limiting portion extends along the first direction, the second limiting portion extends along the second direction, and the first limiting portion and the second limiting portion are symmetrical about the partition.

[0010] The sixth technical solution is based on any one of the first to fifth technical solutions and is a preferred embodiment of any one of the first to fifth technical solutions, wherein the absorption capacitor also includes a capacitor body, and the connecting row is configured to be suitable for making the capacitor body and the IGBT electrical component spaced apart along a third direction and at least partially opposite to the IGBT electrical component; the partition forms a cutting line on one side close to the capacitor body that is suitable for avoiding the notch of the capacitor body.

[0011] The seventh technical solution is based on the sixth technical solution and is a preferred embodiment of the sixth technical solution, wherein the cutting line includes a first cutting line extending along a third direction and at least two second cutting lines arranged at intervals along the third direction, extending along the first direction and intersecting with the first cutting line.

[0012] The eighth technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein reinforcing ribs are symmetrically provided on both sides of the partition.

[0013] The ninth technical solution is based on the eighth technical solution and is a preferred embodiment of the eighth technical solution, wherein the reinforcing rib is integrally connected with the first limiting portion and the second limiting portion.

[0014] The tenth technical solution is based on the ninth technical solution and is a preferred embodiment of the ninth technical solution, wherein the reinforcing ribs include first reinforcing ribs, second reinforcing ribs and third reinforcing ribs, the second reinforcing ribs extend along the first direction and are located in the middle of the partition along the third direction, the first reinforcing ribs and the third reinforcing ribs are respectively connected to the two ends of the second reinforcing ribs and both extend along the third direction, the first limiting portion connects the first reinforcing ribs and the third reinforcing ribs, and the second limiting portion connects the second reinforcing ribs.

[0015] From the above description of the utility model and its specific embodiments, it can be seen that, compared with the prior art, the technical solution of the utility model and its related embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In the first technical solution and related embodiments, the partition being plugged into place means that the partition abuts against the bottom of the slot and cannot continue to move toward the main body. During installation, the IGBT electrical component is first installed on the substrate, and then the first limiting portion of the isolating member and the partition are respectively inserted into the accommodating channel and the slot until the partition abuts against the bottom of the slot. At this time, the second limiting portion is located outside the slot. Subsequently, the two connecting rows of the absorption capacitor are respectively connected to the positive terminal and the negative terminal, and the connecting rows can abut against the second limiting portion and limit it. Among them, the direction of the isolating member approaching the main body and the direction away from the main body are both the first direction.

[0017] Specifically, the cooperation between the partition and the plug-in slot allows the isolating member and the IGBT electrical component to be limited in the second direction, and the cooperation between the first limiting portion and the accommodating channel allows the assembly formed by the isolating member, the IGBT and the substrate to be limited in the third direction. The second limiting portion is suitable for abutting the two connection rows when the partition is plugged into place to limit the movement of the isolating member in the direction away from the main body. At this time, the bottom of the plug-in slot limits the movement of the isolating member in the direction close to the main body. Since the IGBT electrical component, the substrate and the absorption capacitor are fixed to each other, the above-mentioned arrangement allows the isolating member and the IGBT electrical component, the substrate and the absorption capacitor to form a limiting structure. The limiting structure allows the isolating member to be limited in the first direction, the second direction and the third direction relative to the IGBT electrical component, so that the isolating member can form electrical isolation between the positive terminal and the negative terminal. Therefore, the technical solution can utilize the structure of the IGBT electrical component, the substrate and the absorption capacitor itself to form a limiting structure suitable for the isolating member, which has a simple structure, low cost and is easy to install.

[0018] In the second technical solution and related embodiments, the limiting surface is suitable for contacting with the second limiting portion to limit the movement of the isolating member in the direction close to the substrate, so that the movement margin of the isolating member in the third direction relative to the IGBT electrical component is smaller, so that it is less likely to shake after installation and the structure is more stable. The direction in which the isolating member is close to the substrate is the third direction.

[0019] In the third technical solution and related embodiments, the partition is provided with a protrusion protruding from the second limiting portion, and the limiting surface is also suitable for abutting against the protrusion to limit the movement of the isolation member in the direction close to the substrate. On the one hand, this makes the connection between the second limiting portion and the partition more stable, and on the other hand, it further makes the movement margin of the isolation member relative to the IGBT electrical component along the third direction smaller.

[0020] In the fourth technical solution and related embodiments, the arrangement of the connecting row facilitates abutment against the second limiting portion, thereby facilitating installation.

[0021] In the fifth technical solution and related embodiments, the first limiting portion extends along the first direction, and the second limiting portion extends along the second direction. The first limiting portion and the second limiting portion are symmetrical about the partition, so that the isolation member is subjected to more balanced force, and the structure is simple and easy to process, avoiding unnecessary interference.

[0022] In the sixth technical solution and related embodiments, a cutting line suitable for avoiding the gap of the capacitor body is formed on one side of the partition close to the absorption capacitor. Therefore, when the distance between the capacitor body and the IGBT electrical component in the third direction is large, the partition does not need to be cut. When the distance between the capacitor body and the IGBT electrical component in the third direction is small, the partition can be cut along the cutting line to form a gap to avoid the capacitor body. In this case, the partition can be inserted between the capacitor body and the IGBT electrical component to increase the safety distance. Therefore, the isolation component of the present technical solution can be applicable to IGBT electrical components and absorption capacitors with various spacings, has strong versatility and lower cost.

[0023] In the seventh technical solution and related embodiments, the cutting lines include a first cutting line extending along a third direction and at least two second cutting lines arranged along the third direction and extending along the first direction and intersecting with the first cutting lines. Therefore, in actual applications, according to the cutting of the first cutting line and different second cutting lines, the partition can be suitable for IGBT electrical components and capacitor bodies with different spacings, with strong versatility and lower cost.

[0024] In the eighth technical solution and related embodiments, reinforcing ribs are symmetrically provided on both sides of the partition, which increases the structural strength of the partition and makes the electrical isolation more stable.

[0025] In the ninth technical solution and related implementations, the reinforcing ribs are connected as a whole with the first limiting portion and the second limiting portion, which ensures the strength of the first limiting portion and the second limiting portion and further increases the structural strength of the partition, making the electrical isolation more stable.

[0026] In the tenth technical solution and related embodiments, the arrangement of the first reinforcing rib, the second reinforcing rib and the third reinforcing rib is easy to process and strengthens the middle part of the partition, further increasing the strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of an embodiment of the present utility model Figure 1 ;

[0029] Figure 2 An exploded view of an embodiment of the utility model;

[0030] Figure 3 This is an example of the utility model Figure 2 ;

[0031] Figure 4 for Figure 3 An enlarged schematic diagram of part A;

[0032] Figure 5 It is a schematic diagram of a partition according to an embodiment of the utility model.

[0033] Description of main reference numerals:

[0034] Substrate 10; IGBT electrical component 20; body 21; limiting surface 211; connecting portion 22; plug-in slot 23; accommodating channel 01; absorption capacitor 30; capacitor body 31; connecting row 32; first section 321; second section 322; isolating member 40; partition 41; bump 411; first reinforcing rib 412; second reinforcing rib 413; third reinforcing rib 414; first cutting line 415; second cutting line 416; first limiting portion 42; second limiting portion 43. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0036] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0037] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0038] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0039] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0040] See also Figure 1-5 , Figure 1-5 An electrical isolation structure of an IGBT module is shown, comprising a substrate 10, an IGBT electrical component 20, an absorption capacitor 30 and an isolation component 40.

[0041] In this embodiment, the substrate 10 is mainly a substrate 10 of a heat sink, which is used to dissipate heat for the IGBT electrical component 20. The substrate 10 is parallel to the first direction and the second direction and perpendicular to the third direction, that is, the first direction, the second direction and the third direction are orthogonal to each other. Figure 1 In the embodiment, the first direction is the front-to-back direction, the second direction is the left-to-right direction, and the third direction is the up-down direction.

[0042] See also Figure 2 The IGBT electrical component 20 includes a body 21 extending along a first direction and two connecting portions 22 protruding from at least one end of the body 21 and arranged at intervals along a second direction; Figure 2In the figure, two connecting parts 22 are provided at both ends of the body 21 along the first direction; the body 21 is attached to the substrate 10; the two connecting parts 22 cooperate with the body 21 to form a plug-in slot 23 that opens outward and extends along the third direction and passes through, and the connecting part 22 is at least partially suspended from the substrate 10 and forms a receiving channel 01 with the substrate 10; the upper ends of the two connecting parts 22 are respectively provided with a positive terminal and a negative terminal. In practical applications, the parts of the connecting part 22 other than the positive terminal and the negative terminal are all insulated. Among them, one end of the body 21 close to the connecting part 22 is also provided with a limiting surface 211 away from the substrate 10, Figure 2 In the embodiment, a limiting surface 211 is formed on the upper surface of the body 21 , and the limiting surface 211 is perpendicular to the third direction.

[0043] The absorption capacitor 30 can absorb the voltage fluctuation of the IGBT electrical component 20 so that the IGBT electrical component 20 operates more stably. Figure 2 The absorption capacitor 30 includes a capacitor body 31 and two connection rows 32 respectively suitable for connecting to the positive terminal and the negative terminal; the connection row 32 is configured to be suitable for making the capacitor body 31 and the IGBT electrical component 20 spaced apart along the third direction and at least partially opposite to the IGBT electrical component 20; specifically, the connection row 32 includes a first section 321 extending along the first direction and a second section 322 extending along the third direction connected to each other, the first section 321 is suitable for connecting to the positive terminal or the negative terminal; the second section 322 is closer to the body 21 relative to the first section 321, that is, the second section 322 is located on the rear side of the first section 321.

[0044] See also Figure 2 and Figure 5The isolating member 40 is provided with a partition 41, a first limiting portion 42 and a second limiting portion 43. The partition 41 is perpendicular to the second direction and extends along the first direction. The first limiting portion 42, the second limiting portion 43 and the partition 41 are connected as a whole. The first limiting portion 42 extends along the first direction and is located at the bottom end of the partition 41. The first limiting portion 42 is a plate-shaped portion perpendicular to the third direction. The second limiting portion 43 extends along the second direction and is located at the rear end of the partition 41. The second limiting portion 43 is a plate-shaped portion perpendicular to the first direction. The first limiting portion 42 and the second limiting portion 43 are symmetrical about the partition 41. The partition 41 is suitable for being inserted into the plug-in slot 23 and is configured to be inserted into place when Electrical isolation is formed between the positive terminal and the negative terminal. The partition 41 is plugged into place, which means that the partition 41 abuts against the bottom of the plug slot 23 and cannot continue to move toward the direction close to the body 21. In addition to the part located in the plug slot 23, the partition 41 should also extend out of the plug slot 23 to increase the safety distance. The first limiting portion 42 is suitable for being inserted into the accommodating channel 01. The second limiting portion 43 is suitable for abutting against the two connecting rows 32 when the partition 41 is plugged into place to limit the movement of the isolation member 40 away from the body 21. In this embodiment, the second limiting portion 43 is suitable for abutting against the side of the second section 322 away from the first section 321, that is, the rear surface of the second section 322. The direction of the isolation member 40 approaching the body 21 and the direction away from the body 21 are both the first direction.

[0045] See also Figure 4-5 The partition plate 41 is provided with a protrusion 411 protruding from the second limiting portion 43, and the limiting surface 211 is also suitable for abutting against the protrusion 411 to limit the movement of the isolation member 40 in the direction close to the substrate 10, and the direction in which the isolation member 40 is close to the substrate 10 is the third direction. The limiting surface 211 is suitable for abutting against the second limiting portion 43 to limit the movement of the isolation member 40 in the direction close to the substrate 10.

[0046] In order to increase the overall strength of the isolation member 40, in this embodiment, reinforcing ribs are further provided on both sides of the partition plate 41. The reinforcing ribs are integrally connected with the first limiting portion 42 and the second limiting portion 43. Figure 5 The reinforcing ribs include a first reinforcing rib 412, a second reinforcing rib 413 and a third reinforcing rib 414. The second reinforcing rib 413 extends along the first direction and is located in the middle of the partition 41 along the third direction. The first reinforcing rib 412 and the third reinforcing rib 414 are respectively connected to the two ends of the second reinforcing rib 413 and both extend along the third direction. The first limiting portion 42 connects the first reinforcing rib 412 and the third reinforcing rib 414. The third reinforcing rib 414 is closer to the second limiting portion 43. The second limiting portion 43 is connected to the second reinforcing rib 413.

[0047] In practical applications, there are different distances between the capacitor body 31 and the IGBT electrical component 20. When the distance is small, the partition 41 may interfere with the capacitor body 31 of the absorption capacitor 30. Therefore, in this embodiment, see Figure 2and Figure 5 The partition 41 is formed on one side close to the absorption capacitor 30 with a cutting line suitable for avoiding the notch of the absorption capacitor 30. The cutting line includes a first cutting line 415 extending along the third direction and at least two second cutting lines 416 arranged at intervals along the third direction, extending along the first direction and intersecting with the first cutting line 415. Both the first cutting line 415 and the second cutting line 416 are located above the bump 411.

[0048] When assembling this embodiment, the IGBT electrical component 20 is first installed on the substrate 10, and then the first limiting portion 42 and the partition 41 of the isolation member 40 are respectively inserted into the accommodating channel 01 and the plug-in slot 23 until the partition 41 abuts against the bottom of the plug-in slot 23. At this time, the second limiting portion 43 and the protrusion 411 are located outside the plug-in slot 23 and abut against the limiting surface 211. Subsequently, the two connecting rows 32 of the absorption capacitor 30 are respectively connected to the positive terminal and the negative terminal. In actual applications, the connecting row 32 can abut against the second limiting portion 43 and limit it mainly by screw locking.

[0049] It can be seen that the cooperation between the partition 41 and the plug-in slot 23 limits the isolation member 40 and the IGBT along the second direction, and the cooperation between the first limiting portion 42 and the accommodating channel 01 limits the isolation member 40 and the assembly formed by the IGBT and the substrate 10 along the third direction. The limiting surface 211 cooperates with the second limiting portion 43 and the protrusion 411 to limit the isolation member 40 from moving in the direction close to the base. The second limiting portion 43 is suitable for abutting against the two connection rows 32 when the partition 41 is plugged in place to limit the isolation member 40 from moving in the direction away from the body 21. At this time, the insertion slot 23 The groove bottom limits the isolation member 40 from moving in the direction approaching the main body 21, while the connection row 32 limits the isolation member 40 from moving in the direction away from the main body 21. Since the IGBT electrical component 20, the substrate 10 and the absorption capacitor 30 are fixed to each other, the above-mentioned arrangement enables the isolation member 40 to form a limiting structure with the IGBT electrical component 20, the substrate 10 and the absorption capacitor 30. The limiting structure limits the isolation member 40 relative to the IGBT electrical component 20 in the first direction, the second direction and the third direction, so that the isolation member 40 can form electrical isolation between the positive terminal and the negative terminal.

[0050] Therefore, in this embodiment, the structures of the IGBT electrical component 20, the substrate 10 and the absorption capacitor 30 can be used to form a limiting structure suitable for the isolation component 40, which has a simple structure, low cost and convenient installation. The limiting surface 211 is suitable for abutting with the second limiting portion 43 to limit the movement of the isolation component 40 in the direction close to the substrate 10, so that the movement margin of the isolation component 40 relative to the IGBT electrical component 20 in the third direction is smaller, so it is less likely to shake after installation, and the structure is more stable. The partition 41 is provided with a protrusion 411 protruding from the second limiting portion 43, and the limiting surface 211 is also suitable for abutting with the protrusion 411 to limit the movement of the isolation component 40 in the direction close to the substrate 10, which makes the connection between the second limiting portion 43 and the partition 41 more stable on the one hand, and further makes the movement margin of the isolation component 40 relative to the IGBT electrical component 20 in the third direction smaller on the other hand.

[0051] In this embodiment, the arrangement of the connecting row 32 is easy to achieve abutment with the second limiting portion 43, so as to facilitate installation. The first limiting portion 42 extends along the first direction, and the second limiting portion 43 extends along the second direction. The first limiting portion 42 and the second limiting portion 43 are symmetrical about the partition 41, and the isolating member 40 is subjected to a more balanced force, and the structure is simple and easy to process, and unnecessary interference is avoided. The two sides of the partition 41 are also symmetrically provided with reinforcing ribs, which increase the structural strength of the partition 41 and make the electrical isolation more stable. The reinforcing ribs are connected as a whole with the first limiting portion 42 and the second limiting portion 43, which ensures the strength of the first limiting portion 42 and the second limiting portion 43, and further increases the structural strength of the partition 41, making the electrical isolation more stable. The arrangement of the first reinforcing rib 412, the second reinforcing rib 413 and the third reinforcing rib 414 is easy to process, and strengthens the middle part of the partition 41, further increasing the strength.

[0052] In the present embodiment, a cutting line suitable for avoiding the gap of the capacitor body 31 is formed on one side of the partition 41 close to the absorption capacitor 30. Therefore, when the distance between the capacitor body 31 and the IGBT electrical component 20 in the third direction is large, the partition 41 may not be cut. When the distance between the capacitor body 31 and the IGBT electrical component 20 in the third direction is small, the partition 41 may be cut along the cutting line to form a gap in the partition 41 to avoid the capacitor body 31. In this case, the partition 41 can be inserted between the capacitor body 31 and the IGBT electrical component 20, thereby increasing the safety distance. In addition, the isolation component 40 of the present embodiment can be applicable to IGBT electrical components 20 and absorption capacitors 30 with various spacings, and has strong versatility and lower cost.

[0053] In this embodiment, the cutting lines include a first cutting line 415 extending along a third direction and at least two second cutting lines 416 arranged along the third direction at intervals and extending along the first direction and intersecting with the first cutting line 415. Therefore, in actual applications, according to the cutting of the first cutting line 415 and different second cutting lines 416, the partition 41 can be suitable for IGBT electrical components 20 and capacitor bodies 31 with different spacings, with strong versatility and lower cost.

[0054] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. An electrical isolation structure of an IGBT module, characterized in that: include base(10); An IGBT electrical component (20), comprising a body (21) extending in a first direction and two connecting portions (22) protruding from at least one end of the body (21) and arranged at intervals in a second direction; the body (21) is attached to the substrate (10); the two connecting portions (22) cooperate with the body (21) to form a plug-in slot (23) extending and penetrating in a third direction and opening outward, the connecting portion (22) is at least partially suspended from the substrate (10) and forms a receiving channel (01) between the substrate (10); the two connecting portions (22) are respectively provided with a positive terminal and a negative terminal; the first direction, the second direction and the third direction are orthogonal to each other; An absorption capacitor (30) having two connection banks (32) respectively adapted to be connected to the positive terminal and the negative terminal; and An isolating member (40) is provided with a partition (41), a first limiting portion (42) and a second limiting portion (43), wherein the partition (41) is suitable for being inserted into the plug-in slot (23) and is configured to form electrical isolation between the positive terminal and the negative terminal when plugged in place, the first limiting portion (42) is suitable for being inserted into the accommodating channel (01), and the second limiting portion (43) is suitable for abutting against two connecting rows (32) when the partition (41) is plugged in place to limit the movement of the isolating member (40) in a direction away from the body (21).

2. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: An end of the body (21) close to the connecting portion (22) is also provided with a limiting surface (211) away from the substrate (10), and the limiting surface (211) is suitable for abutting against the second limiting portion (43) to limit the movement of the isolation member (40) in a direction close to the substrate (10).

3. The electrical isolation structure of an IGBT module as claimed in claim 2, characterized in that: The first limiting portion (42), the second limiting portion (43) and the partition (41) are connected as a whole; the partition (41) is provided with a convex block (411) protruding from the second limiting portion (43); and the limiting surface (211) is also suitable for abutting against the convex block (411) to limit the movement of the isolation member (40) in a direction close to the substrate (10).

4. The electrical isolation structure of an IGBT module as claimed in claim 3, characterized in that: The connecting row (32) comprises a first section (321) extending along a first direction and a second section (322) extending along a third direction which are connected to each other, the first section (321) being suitable for being connected to a positive terminal or a negative terminal; the second section (322) being closer to the body (21) than the first section (321), and a side of the second section (322) facing away from the first section (321) being suitable for abutting against the second limiting portion (43).

5. The electrical isolation structure of an IGBT module as claimed in claim 4, characterized in that: The first limiting portion (42) extends along a first direction, the second limiting portion (43) extends along a second direction, and the first limiting portion (42) and the second limiting portion (43) are both symmetrical with respect to the partition plate (41).

6. An electrical isolation structure of an IGBT module according to any one of claims 1 to 5, characterized in that: The absorption capacitor (30) further comprises a capacitor body (31); the connection row (32) is configured to enable the capacitor body (31) and the IGBT electrical component (20) to be arranged at intervals along a third direction and at least partially opposite to the IGBT electrical component (20); and a cutting line is formed on a side of the partition (41) close to the capacitor body (31) to avoid a notch in the capacitor body (31).

7. The electrical isolation structure of an IGBT module as claimed in claim 6, characterized in that: The cutting lines include a first cutting line (415) extending along a third direction and at least two second cutting lines (416) arranged at intervals along the third direction, extending along the first direction and intersecting the first cutting line (415).

8. The electrical isolation structure of an IGBT module according to claim 1, characterized in that: Reinforcing ribs are symmetrically arranged on both sides of the partition plate (41).

9. The electrical isolation structure of an IGBT module as claimed in claim 8, characterized in that: The reinforcing rib is integrally connected to the first limiting portion (42) and the second limiting portion (43).

10. The electrical isolation structure of an IGBT module as claimed in claim 9, characterized in that: The reinforcing ribs include a first reinforcing rib (412), a second reinforcing rib (413) and a third reinforcing rib (414); the second reinforcing rib (413) extends along a first direction and is located in the middle of the partition (41) along a third direction; the first reinforcing rib (412) and the third reinforcing rib (414) are respectively connected to two ends of the second reinforcing rib (413) and both extend along the third direction; the first limiting portion (42) connects the first reinforcing rib (412) and the third reinforcing rib (414); and the second limiting portion (43) connects the second reinforcing rib (413).

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