A high-strength insulating baffle for a flexible direct current converter valve power module

Abstract

The present invention discloses a high-strength insulating baffle for a flexible direct current converter valve power module, comprising a baffle frame and reinforcing fins. The baffle frame comprises a top connecting plate, two side connecting plates and a bottom reinforcing rib plate. The two ends of the top connecting plate are respectively connected to the upper ends of the two side connecting plates, the two ends of the bottom reinforcing rib plate are respectively connected to the lower ends of the two side connecting plates, the plate surface of the top connecting plate and the plate surface of the bottom reinforcing rib plate are perpendicular to each other, and the top connecting plate, the two side connecting plates and the bottom reinforcing rib plate are jointly enclosed to form a socket space; the reinforcing fins are located on both sides of the baffle frame, the reinforcing fins are connected to the side connecting plates, and the reinforcing fins are extended along the length direction of the side connecting plates. The high-strength insulating baffle of the present invention is connected to the power module radiator to achieve rapid installation and disassembly. By adopting a polymer one-piece molding process, by controlling the length and proportion of glass fibers in the polymer, the structural strength is improved while ensuring electrical performance, and the impact of explosive force is effectively resisted.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible direct current converter valves, and in particular to a high-strength insulating baffle for a flexible direct current converter valve power module. Background Art

[0002] In the field of flexible DC transmission, the converter valve is composed of many IGBT (Insulated Gate Bipolar Transistor) power modules. Under special fault conditions (such as overvoltage of the power module, mistaken closing of the bypass switch, etc.), the IGBT device will break down and cause the device to explode. The instantaneous explosion airflow will splash the material inside or on the outer shell of the device. The splash has high kinetic energy under the action of the explosion force. If it is ejected from the power module, it may affect the normal operation of other modules. At present, the common practice in the industry is to use metal or insulating panels to cover the module head completely.

[0003] The disadvantage of covering the entire head of the flexible DC converter valve module is that the panel will not only increase the volume of the entire power module, but also increase the difficulty and time consumption of module maintenance, which is not conducive to on-site operation and maintenance and component status observation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-strength insulating baffle for a flexible DC converter valve power module. The baffle has a small size and covers the head of the intermediate radiator of the flexible DC converter valve alone, thereby achieving quick installation and disassembly, avoiding increasing the size of the flexible DC converter valve, and not affecting the maintenance and status observation of the flexible DC converter valve. While ensuring electrical performance, the strength of the structural parts is improved, and the impact of explosive forces can be effectively resisted.

[0005] The technical solution of the present invention is: a high-strength insulating baffle for a flexible direct current converter valve power module, comprising a baffle frame and reinforcing fins, wherein the baffle frame comprises a top connecting plate, two side connecting plates and a bottom reinforcing rib plate, the two ends of the top connecting plate are respectively connected to the upper ends of the two side connecting plates, the two ends of the bottom reinforcing rib plate are respectively connected to the lower ends of the two side connecting plates, the plate surface of the top connecting plate and the plate surface of the bottom reinforcing rib plate are perpendicular to each other, and the top connecting plate, the two side connecting plates and the bottom reinforcing rib plate are jointly enclosed to form a sleeve space;

[0006] The reinforcing fins are located on both sides of the baffle frame, the reinforcing fins are connected to the side connecting plates, and the reinforcing fins are extended along the length direction of the side connecting plates.

[0007] The flexible direct current converter valve power module of the present invention uses a high-strength insulating baffle, and the baffle frame is installed on the intermediate radiator of the flexible direct current converter valve power module, wherein the top connecting plate abuts against the top of the intermediate radiator, the two side connecting plates abut against the two sides of the intermediate radiator respectively, and the bottom reinforcing rib plate abuts against the front end surface of the intermediate radiator. The baffle frame is connected to the intermediate radiator from the front end surface of the intermediate radiator and then fixed, which is convenient for installation and disassembly. At the same time, the bottom reinforcing rib plate is fixed to the front end surface of the intermediate radiator, which reduces the volume of the baffle frame in the up and down directions, strengthens the fin shielding of the IGBT module, and improves the strength of the structural parts while ensuring the electrical performance, which can effectively resist the impact of explosive force.

[0008] Furthermore, the connection between the bottom reinforcing rib plate and the side connecting plate adopts an inclined transition, and the connection between the bottom reinforcing rib plate and the side connecting plate forms an obtuse angle greater than 120°, which can effectively improve the structural strength of the connection between the bottom reinforcing rib plate and the side connecting plate.

[0009] Furthermore, the flexible direct current converter valve power module includes two side heat sinks, a middle heat sink and two IGBTs. The two IGBTs jointly clamp the middle heat sink. The two side heat sinks are respectively located on the outsides of the two IGBTs. The baffle frame is sleeved to the end of the middle heat sink. The middle heat sink enters the sleeve space, and the reinforced fins cover the IGBTs on both sides of the middle heat sink.

[0010] Furthermore, the top connecting plate is provided with a first bolt hole, the bottom reinforcing rib plate is provided with a second bolt hole, the axis of the first bolt hole is perpendicular to the axis of the second bolt hole, and the middle radiator is provided with mounting holes corresponding to the first bolt hole and the second bolt hole respectively. The baffle frame can be mounted to the middle radiator by bolts, which is convenient for installation and removal.

[0011] Furthermore, the reinforcing fin includes a fin transverse plate and a fin vertical plate, one end of the fin transverse plate is vertically connected to the plate surface of the side connecting plate, the fin transverse plate extends along the length direction of the side connecting plate, and the fin vertical plate is vertically connected to the fin transverse plate. The fin transverse plate and the fin vertical plate shield and cover the IGBT to resist the impact of the explosion force.

[0012] Furthermore, the connection between the fin transverse plate and the side connecting plate adopts an arc transition to enhance the connection strength between the fin transverse plate and the side connecting plate.

[0013] Furthermore, the relationship between the number N of the fin risers and the length A of the fin transverse plates is N=A / 2.2.

[0014] Furthermore, the ratio of the fin transverse plate width B1 to the fin vertical plate width B2 is B1:B2=(8-12):(2-3), and B2 is greater than 2 mm.

[0015] Furthermore, the baffle frame and the reinforcing fins are made of polymer by integral molding, and the polymer includes glass fiber and epoxy resin or unsaturated resin.

[0016] Furthermore, the length of the glass fiber is 25-35 mm, and the proportion of the glass fiber to the polymer is 30-40%. By controlling the length and proportion of the glass fiber in the polymer, the strength of the structural parts can be improved while ensuring the electrical performance, and the impact of the explosive force can be effectively resisted.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The high-strength insulating baffle for the flexible direct current converter valve power module of the present invention is connected to the power module heat sink to achieve rapid installation and removal. The polymer one-piece molding process is adopted to control the length and proportion of glass fiber in the polymer, thereby improving the strength of the structural parts while ensuring electrical performance, and can effectively resist the impact of explosive force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a high-strength insulating baffle for a flexible DC converter valve power module of the present invention.

[0020] Figure 2 It is a schematic diagram of the assembly of the high-strength insulating baffle and the flexible DC converter valve power module of the present invention.

[0021] Figure 3 It is a cross-sectional view of the high-strength insulating baffle of the present invention.

[0022] Side heat sink 1, middle heat sink 2, IGBT 3, baffle frame 4, top connecting plate 41, first bolt hole 411, side connecting plate 42, bottom reinforcing rib plate 43, second bolt hole 431, socket space 44, reinforcing fin 5, fin transverse plate 51, and fin vertical plate 52. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0024] Example

[0025] like Figure 1 As shown, this embodiment provides a high-strength insulating baffle for a flexible DC converter valve power module, including a baffle frame and reinforced fins.

[0026] like Figure 2 As shown, the flexible direct current converter valve power module includes two side heat sinks 1, a middle heat sink 2 and two IGBTs 3. The two IGBTs clamp the middle heat sink together, and the two side heat sinks are respectively located on the outsides of the two IGBTs.

[0027] like Figure 1 and Figure 2 As shown, the baffle frame 4 includes a top connecting plate 41, two side connecting plates 42 and a bottom reinforcing rib plate 43, the two ends of the top connecting plate are respectively connected to the upper ends of the two side connecting plates, the two ends of the bottom reinforcing rib plate are respectively connected to the lower ends of the two side connecting plates, the plate surface of the top connecting plate and the plate surface of the bottom reinforcing rib plate are perpendicular to each other, and the top connecting plate, the two side connecting plates and the bottom reinforcing rib plate are jointly enclosed to form a socket space 44.

[0028] like Figure 1 and Figure 2 As shown, the connection between the bottom reinforcing rib plate and the side connecting plate adopts an inclined transition, and the connection between the bottom reinforcing rib plate and the side connecting plate forms an obtuse angle greater than 120°, which can effectively improve the structural strength of the connection between the bottom reinforcing rib plate and the side connecting plate.

[0029] like Figure 1 and Figure 2 As shown, the baffle frame is sleeved to the end of the middle radiator, the middle radiator enters the sleeve space, and the reinforcing fins cover the IGBTs on both sides of the middle radiator. A first bolt hole 411 is provided on the top connecting plate, and a second bolt hole 431 is provided on the bottom reinforcing rib plate. The axis of the first bolt hole is perpendicular to the axis of the second bolt hole, and the middle radiator is provided with mounting holes corresponding to the first bolt hole and the second bolt hole respectively. The baffle frame can be installed to the middle radiator by bolts, which is convenient for installation and removal.

[0030] like Figure 1 and Figure 3 As shown, the reinforcing fin 5 includes a fin cross plate 51 and a fin vertical plate 52, one end of the fin cross plate is vertically connected to the plate surface of the side connecting plate, the fin cross plate extends along the length direction of the side connecting plate, and the fin vertical plate is vertically connected to the fin cross plate. The connection between the fin cross plate and the side connecting plate adopts an arc transition. The fin cross plate and the fin vertical plate shield and cover the IGBT to resist the impact of the explosion force.

[0031] The relationship between the number of fin risers N and the length A of the fin cross plate is N=A / 2.2. In this embodiment, A is 4.4 mm and N is 2. The ratio of the width B1 of the fin cross plate to the width B2 of the fin riser is B1:B2=(8-12):(2-3), and B2 is greater than 2 mm. In this embodiment, B2 is 2.5 mm and B1 is 10 mm.

[0032] The baffle frame and the reinforcing fins are made of a polymer integrally formed, and the polymer includes glass fiber and epoxy resin or unsaturated resin. The length of the glass fiber is 25-35 mm, and the proportion of glass fiber to the polymer is 30-40%. By controlling the length and proportion of the glass fiber in the polymer, the strength of the structural parts is improved while ensuring the electrical performance, and the impact of the explosive force can be effectively resisted. In this embodiment, the length of the glass fiber is 30 mm, and the proportion of glass fiber to the polymer is 35%.

[0033] The flexible direct current converter valve power module of the present invention uses a high-strength insulating baffle, and the baffle frame is installed on the intermediate radiator of the flexible direct current converter valve power module, wherein the top connecting plate abuts against the top of the intermediate radiator, the two side connecting plates abut against the two sides of the intermediate radiator respectively, and the bottom reinforcing rib plate abuts against the front end surface of the intermediate radiator. The baffle frame is connected to the intermediate radiator from the front end surface of the intermediate radiator and then fixed, which is convenient for installation and disassembly. At the same time, the bottom reinforcing rib plate is fixed to the front end surface of the intermediate radiator, which reduces the volume of the baffle frame in the up and down directions, strengthens the fin shielding of the IGBT module, and improves the strength of the structural parts while ensuring the electrical performance, which can effectively resist the impact of explosive force.

[0034] As described above, the present invention can be better implemented. The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made according to the content of the present invention are covered by the scope of protection required by the claims of the present invention.

Claims

1. A high-strength insulating baffle for a flexible direct current converter valve power module, characterized in that: It comprises a baffle frame and a reinforcing fin, wherein the baffle frame comprises a top connecting plate, two side connecting plates and a bottom reinforcing rib plate, the two ends of the top connecting plate are respectively connected to the upper ends of the two side connecting plates, the two ends of the bottom reinforcing rib plate are respectively connected to the lower ends of the two side connecting plates, the plate surface of the top connecting plate and the plate surface of the bottom reinforcing rib plate are perpendicular to each other, and the top connecting plate, the two side connecting plates and the bottom reinforcing rib plate are jointly enclosed to form a sleeve space; The reinforcing fins are located on both sides of the baffle frame, the reinforcing fins are connected to the side connecting plates, and the reinforcing fins are extended along the length direction of the side connecting plates.

2. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 1, characterized in that: The connection between the bottom reinforcing rib plate and the side connecting plate adopts an inclined transition, and the connection between the bottom reinforcing rib plate and the side connecting plate forms an obtuse angle greater than 120°.

3. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 1, characterized in that: The flexible direct current converter valve power module includes two side heat sinks, a middle heat sink and two IGBTs. The two IGBTs jointly clamp the middle heat sink. The two side heat sinks are respectively located on the outsides of the two IGBTs. The baffle frame is sleeved to the end of the middle heat sink. The middle heat sink enters the sleeve space, and the reinforcing fins cover the IGBTs on both sides of the middle heat sink.

4. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 3 is characterized in that: The top connecting plate is provided with a first bolt hole, the bottom reinforcing rib plate is provided with a second bolt hole, the axis of the first bolt hole is perpendicular to the axis of the second bolt hole, and the middle radiator is provided with mounting holes corresponding to the first bolt hole and the second bolt hole respectively.

5. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 1, characterized in that: The reinforcing fin comprises a fin transverse plate and a fin vertical plate, one end of the fin transverse plate is vertically connected to the plate surface of the side connecting plate, the fin transverse plate extends along the length direction of the side connecting plate, and the fin vertical plate is vertically connected to the fin transverse plate.

6. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 5, characterized in that: The connection between the fin transverse plate and the side connecting plate adopts arc transition.

7. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 5, characterized in that: The relationship between the number N of the vertical fin plates and the length A of the horizontal fin plates is N=A / 2.

2.

8. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 5, characterized in that: The ratio of the fin transverse plate width B1 to the fin vertical plate width B2 is B1:B2=(8-12):(2-3), and B2 is greater than 2 mm.

9. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 1, characterized in that: The baffle frame and the reinforcing fins are made of polymer in one piece, and the polymer includes glass fiber and epoxy resin or unsaturated resin.

10. The high-strength insulating baffle for a flexible direct current converter valve power module according to claim 9, characterized in that: The length of the glass fiber is 25-35 mm, and the proportion of the glass fiber to the polymer is 30-40%.

Images