Silicon carbide power device and solid-state relay thereof

Abstract

The utility model discloses a silicon carbide power device and a solid-state relay thereof, and relates to the technical field of relays. The device comprises a base, clamping plates are fixedly arranged on the two sides of the base, clamping grooves are formed in one sides of the two clamping plates, a plurality of mounting screw cylinders are fixedly arranged on one side of the base, a relay shell is arranged on one side of the base, and clamping blocks matched with the two clamping grooves for use are fixedly arranged on the two sides of the relay shell. According to the solid-state relay, through the clamping plate and the clamping groove on the base, rapid installation and stable connection of the relay shell are achieved, the assembling efficiency is improved, meanwhile, follow-up disassembly and maintenance are facilitated through the structure, the overall stability and durability of the relay are enhanced, and the solid-state relay is convenient to assemble and disassemble. According to the silicon carbide power device, the high-temperature-resistant and high-strength silicon carbide shell is adopted, so that the heat dissipation performance and the structural stability of the device are improved, and the protection effect is enhanced through the protection plate.

Description

Technical Field

[0001] This application relates to the technical field of relays, in particular to silicon carbide power devices and their solid-state relays. Background Art

[0002] As a wide-bandgap semiconductor material, silicon carbide has excellent physical and chemical properties, such as high hardness, high melting point, high thermal conductivity, high electron saturation mobility, and wide bandgap. These properties make silicon carbide an ideal material for fabricating high-temperature, high-frequency, and high-power electronic devices; a solid-state relay is a new type of contactless switching device composed entirely of solid-state electronic components. It utilizes the switching characteristics of electronic components (such as switching silicon carbide power devices, thyristors, and other semiconductor devices) to achieve on-off control of the circuit. Compared with traditional mechanical relays, solid-state relays have the advantages of no contacts, no sparks, long life, high speed, and low electromagnetic interference.

[0003] After checking the publication number: CN2466788Y, an AC relay with a diode is disclosed. In this technology, "a coil, an iron core, a yoke, an armature, contacts, a reed, a lead-out piece, a base, a bottom plate, and a housing are provided. A series diode and a parallel diode are respectively provided on the coil. The series diode converts the input signal into a half-wave direct current, making the coil input current only half of that of a bridge rectifier, reducing the requirement of the coil power consumption for the relay coil winding window. The diode connected in parallel on the coil plays a transient suppression role, effectively utilizing the energy of the coil inductance, improving the working reliability of the AC relay, solving the problem of insufficient internal space of the relay, reducing the cost, and being particularly suitable for AC relays with a small volume."

[0004] Regarding the above related technologies, the inventor believes that the installation and stability of most existing solid-state relays are poor, resulting in a cumbersome installation process for solid-state relays and low structural strength. Moreover, the heat dissipation performance and protection effect of most existing silicon carbide power devices are poor, resulting in overheating or damage of silicon carbide power devices during use. Summary of the Utility Model

[0005] The purpose of this application is to provide a silicon carbide power device and its solid-state relay to improve the problems of poor installation and stability of solid-state relays and poor heat dissipation performance and protection effect of silicon carbide power devices.

[0006] The silicon carbide power device and its solid-state relay provided by this application adopt the following technical solutions:

[0007] A silicon carbide power device and its solid-state relay, including a base. On both sides of the base, there are fixed clamping plates. On one side of each of the two clamping plates, there is a clamping groove. On one side of the base, there are fixed a plurality of mounting screw barrels. On one side of the base, there is a relay housing. On both sides of the relay housing, there are fixed clamping blocks respectively cooperating with the two clamping grooves. On one side of the relay housing, there are a plurality of mounting screws respectively cooperating with the plurality of mounting screw barrels.

[0008] By adopting the above technical solution, the solid-state relay realizes the rapid installation and stable connection of the relay housing through the mutual cooperation of the clamping plates and clamping grooves on the base, and the mounting screw barrels and mounting screws, improving the assembly efficiency. At the same time, this structure also facilitates subsequent disassembly and maintenance, enhancing the overall stability and durability of the relay.

[0009] Optionally, on the upper end of the base, there is a fixed hanging plate, and on one side of the hanging plate, there is a hanging hole.

[0010] By adopting the above technical solution, the base can be conveniently hung or fixed in a suitable position through the hanging plate and the hanging hole.

[0011] Optionally, there are four mounting screws, and the four mounting screws are distributed in a rectangular array on one side of the relay housing.

[0012] By adopting the above technical solution, the rectangular array distribution of the mounting screws can effectively improve the stability after fixation.

[0013] Optionally, on one side of the relay housing, there are a plurality of mounting holes, and the inner surfaces of the plurality of mounting holes are respectively rotationally fitted with the outer surfaces of the plurality of mounting screws.

[0014] By adopting the above technical solution, the mounting screw can pass through one side of the relay housing through the mounting hole for rotation.

[0015] A silicon carbide power device, including two silicon carbide housings. On one side of the two silicon carbide housings, there are a plurality of electrodes in common. At one end of each of the two silicon carbide housings, there is a fixing opening. At one end of the opposite sides of the two silicon carbide housings, there are protective plates. At one end of each of the two protective plates, there are threadedly inserted two fixing bolts respectively cooperating with the two silicon carbide housings.

[0016] By adopting the above technical solution, the silicon carbide power device adopts silicon carbide housings with high temperature resistance and high strength, combined with the multi-electrode design and the fixing opening setting, not only improves the heat dissipation performance and structural stability of the device, but also enhances the protection effect through the combination of the protective plate and the fixing bolt, facilitating installation and maintenance, and significantly improving the working reliability and service life of the silicon carbide power device in high-temperature and high-pressure environments.

[0017] Optionally, fixing grooves are formed at one ends of the two protective plates, and inner surfaces of the two fixing grooves are respectively fitted with outer surfaces of the two fixing ports.

[0018] By adopting the above technical solution, the protective plate can be limited and engaged on the outer surface of the fixing port through the fixing groove.

[0019] Optionally, two fixing holes are formed at one ends of the two protective plates, and the four fixing holes are respectively rotatably fitted with outer surfaces of the four fixing bolts.

[0020] By adopting the above technical solution, the fixing bolts can fix the protective plate to the silicon carbide housing through the fixing holes.

[0021] Optionally, there are three electrodes, and the three electrodes are linearly distributed on one side of the two silicon carbide housings. Insulating rubber rings are sleeved on outer surfaces of the three electrodes.

[0022] By adopting the above technical solution, the linear distribution of the electrodes can effectively make connections, and the connection safety can be improved through the insulating rubber rings.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The solid-state relay of the present utility model realizes the quick installation and stable connection of the relay housing through the clamping plate and the clamping groove on the base, improves the assembly efficiency. At the same time, this structure is also convenient for subsequent disassembly and maintenance, enhancing the overall stability and durability of the relay.

[0025] 2. The silicon carbide power device of the present utility model not only improves the heat dissipation performance and structural stability of the device by adopting a silicon carbide housing with high temperature resistance and high strength, but also enhances the protection effect through the protective plate, significantly improving the working reliability and service life of the silicon carbide power device in high-temperature and high-pressure environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the solid-state relay of the present utility model.

[0027] Figure 2 is an exploded schematic structural diagram of the solid-state relay of the present utility model.

[0028] Figure 3 is a schematic structural diagram of the silicon carbide power device of the present utility model.

[0029] In the figure, 1 is a silicon carbide housing; 2 is a fixing port; 3 is a fixing groove; 4 is a protection plate; 5 is a fixing bolt; 6 is a fixing hole; 7 is an insulating rubber ring; 8 is an electrode; 20 is a base; 21 is a relay housing; 22 is a clamping plate; 23 is a clamping groove; 24 is an installation screw cylinder; 25 is an installation screw rod; 26 is an installation hole; 27 is a clamping block; 28 is a hanging plate; 29 is a hanging hole. Detailed implementation mode

[0030] The following combines the attached Figure 1 - attached Figure 3 to further elaborate on this application in detail.

[0031] Embodiment

[0032] The silicon carbide power device and its solid-state relay, referring to Figure 1-2 , include a base 20. The base 20 serves as a basic support member, and clamping plates 22 are fixedly welded on both sides thereof. The clamping plates 22 are made of elastic metal material, and clamping grooves 23 are respectively formed on these clamping plates 22 for subsequent connection and fixation. On one side of the base 20, a plurality of installation screw cylinders 24 are also welded and fixed. These screw cylinders provide threaded connection points for the stable installation of the relay housing 21. The relay housing 21 is the main part of the solid-state relay, and clamping blocks 27 that cooperate with the clamping grooves 23 on the base 20 are welded on both sides thereof. Through the precise docking of the clamping blocks 27 with the clamping grooves 23, the preliminary positioning and connection between the relay housing 21 and the base 20 are achieved. In addition, a plurality of installation screw rods 25 are provided on one side of the relay housing 21. These installation screw rods 25 correspond to the installation screw cylinders 24 on the base 20 one by one. By rotating and tightening, the stable connection between the relay housing 21 and the base 20 is achieved.

[0033] Referring to Figure 2 , a hanging plate 28 is welded and fixed to the upper end of the base 20. A hanging hole 29 is formed on one side of the hanging plate 28. There are four installation screw rods 25, and the four installation screw rods 25 are distributed in a rectangular array on one side of the relay housing 21. A plurality of installation holes 26 are formed on one side of the relay housing 21, and the inner surfaces of the plurality of installation holes 26 are respectively rotationally fitted with the outer surfaces of the plurality of installation screw rods 25. The base 20 can be conveniently hung or fixed at a suitable position through the hanging plate 28 and the hanging hole 29. The rectangular array distribution of the installation screw rods 25 can effectively improve the stability after fixation. The installation screw rods 25 can pass through one side of the relay housing 21 through the installation holes 26 for rotation.

[0034] The silicon carbide power device, referring to Figure 3, including two silicon carbide housings 1, on one side of which there are a plurality of electrodes 8 provided together for connection with an external circuit. At one end of the two silicon carbide housings 1, fixing ports 2 are opened, which facilitate fixing the silicon carbide power device at the required position. Each silicon carbide housing 1 is equipped with a protective plate 4, and the protective plate 4 is closely attached to the surface of the housing to play a protective role. At the same time, two fixing bolts 5 are fixed at one end of the protective plate 4 by means of threaded insertion, and these two fixing bolts 5 are respectively matched with the reserved hole positions on the two silicon carbide housings 1, thereby realizing a firm connection between the protective plate 4 and the silicon carbide housing 1.

[0035] Refer to Figure 3 , fixing grooves 3 are opened at one end of the two protective plates 4, and the inner surfaces of the two fixing grooves 3 are respectively fitted with the outer surfaces of the two fixing ports 2. Two fixing holes 6 are opened at one end of the two protective plates 4, and the four fixing holes 6 are respectively rotatably fitted with the outer surfaces of the four fixing bolts 5. There are three electrodes 8, and the three electrodes 8 are linearly distributed on one side of the two silicon carbide housings 1. Insulating rubber rings 7 are sleeved on the outer surfaces of the three electrodes 8. The protective plate 4 can be limited and clamped on the outer surface of the fixing port 2 through the fixing groove 3, and the fixing bolts 5 can fix the protective plate 4 and the silicon carbide housing 1 through the fixing holes 6. The linear distribution of the electrodes 8 can effectively conduct connections, and the connection safety can be improved through the insulating rubber rings 7.

[0036] The implementation principle of the embodiment of the present application is as follows: When the solid-state relay needs to be installed, the relay housing 21 is fitted with one side of the base 20, so that the clamping plate 22 is bent and can be limited and fixed with the clamping block 27 in cooperation with the clamping groove 23, and the quick positioning installation can be completed. Then, the installation screw 25 is screwed into the installation barrel 24 from one side of the relay housing 21, thereby realizing the quick installation and firm connection of the relay housing 21 and improving the assembly efficiency.

[0037] The base 20 can be conveniently hung or fixed at a suitable position through the hanging plate 28 and the hanging hole 29. The rectangular array distribution of the installation screws 25 can effectively improve the stability after fixation. The installation screws 25 can pass through one side of the relay housing 21 through the installation holes 26 for rotation.

[0038] When the silicon carbide power device needs to be installed, the two silicon carbide housings 1 are fitted together, and at the same time, the electrodes 8 are installed on one side of the housing. Then, the protective plate 4 is installed at the fixing port 2 of the silicon carbide housing 1, and the two silicon carbide housings 1 and the two protective plates 4 are fixed through the fixing bolts 5, thereby improving the heat dissipation performance and structural stability of the silicon carbide power device and enhancing the protection effect.

[0039] The protection plate 4 can be limited and engaged on the outer surface of the fixing port 2 through the fixing groove 3. The fixing bolt 5 can fix the protection plate 4 to the silicon carbide housing 1 through the fixing hole 6. The electrodes 8 are linearly distributed for effective connection, and the connection safety can be improved through the insulating rubber ring 7.

[0040] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. Solid state relay, including a base (20), characterized in that: Both sides of the base (20) are fixedly provided with clamping plates (22), one side of each of the two clamping plates (22) is provided with a clamping groove (23), one side of the base (20) is fixedly provided with a plurality of mounting screw barrels (24), one side of the base (20) is provided with a relay housing (21), both sides of the relay housing (21) are fixedly provided with clamping blocks (27) respectively cooperating with the two clamping grooves (23), and one side of the relay housing (21) is provided with a plurality of mounting screw rods (25) respectively cooperating with the plurality of mounting screw barrels (24).

2. The solid state relay according to claim 1, wherein: The upper end of the base (20) is fixedly provided with a hanging plate (28), and one side of the hanging plate (28) is provided with a hanging hole (29).

3. The solid-state relay according to claim 1, characterized in that: There are four mounting screw rods (25), and the four mounting screw rods (25) are distributed in a rectangular array on one side of the relay housing (21).

4. The solid-state relay according to claim 1, characterized in that: A plurality of mounting holes (26) are formed in one side of the relay housing (21), and the inner surfaces of the plurality of mounting holes (26) are respectively rotationally fitted with the outer surfaces of the plurality of mounting screw rods (25).

5. A silicon carbide power device, characterized in that: Comprising the solid-state relay according to any one of claims 1-4, further comprising two silicon carbide housings (1), a plurality of electrodes (8) are jointly provided on one side of the two silicon carbide housings (1), fixing ports (2) are formed at one end of each of the two silicon carbide housings (1), protective plates (4) are provided at one end of the opposite sides of the two silicon carbide housings (1), and two fixing bolts (5) respectively cooperating with the two silicon carbide housings (1) are threadedly inserted at one end of each of the two protective plates (4).

6. The silicon carbide power device according to claim 5, characterized in that: Fixing grooves (3) are formed at one end of each of the two protective plates (4), and the inner surfaces of the two fixing grooves (3) are respectively fitted with the outer surfaces of the two fixing ports (2).

7. The silicon carbide power device according to claim 5, wherein: Two fixing holes (6) are formed at one end of each of the two protective plates (4), and the four fixing holes (6) are respectively rotationally fitted with the outer surfaces of the four fixing bolts (5).

8. The silicon carbide power device according to claim 5, characterized in that: There are three electrodes (8), and the three electrodes (8) are linearly distributed on one side of the two silicon carbide housings (1), and insulating rubber rings (7) are sleeved on the outer surfaces of the three electrodes (8).

Images