Electromagnetic interference suppression device and method for intelligent high-frequency silicon carbide switching power supply

Abstract

The invention relates to an electromagnetic interference suppression device and method for an intelligent high-frequency silicon carbide switching power supply, and the device comprises a shielding housing and a circuit board, the shielding housing comprises a bottom housing and a surface housing, the inner surface of the bottom housing is provided with a first electromagnetic shielding coating, and the inner surface of the surface housing is provided with a second electromagnetic shielding coating; the edge of the upper surface of the bottom shell is provided with a plurality of metal guide columns, and the edge of the lower surface of the surface shell is provided with a plurality of metal guide sleeves matched with the metal guide columns; a mounting seat, a lifting unit and an intelligent controller are arranged in the bottom shell, and the intelligent controller monitors electromagnetic interference state data of the high-frequency silicon carbide switching power supply module and controls the lifting unit to operate according to the obtained state data; and the size of the heat dissipation gap can be effectively adjusted based on the set safety threshold value and the danger threshold value, so that the electromagnetic shielding protection and heat dissipation requirements are balanced, and the adaptability of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of silicon carbide switching power supplies, and more specifically, to an electromagnetic interference suppression device and method for an intelligent high-frequency silicon carbide switching power supply. Background Art

[0002] An intelligent high-frequency silicon carbide (SiC) switching power supply is an advanced power conversion device that combines silicon carbide semiconductor materials with high-frequency switching technology. Its core lies in using the excellent performance of SiC devices to achieve high-efficiency and high-power-density electrical energy conversion, and optimizing system stability through intelligent control. The precision components inside an intelligent high-frequency silicon carbide (SiC) switching power supply are vulnerable to electromagnetic interference, and usually a shielding enclosure is set up for electromagnetic shielding. However, a large amount of heat is also generated when the components inside the power supply work. If the shielding enclosure is too closed, it will make it difficult for the heat to dissipate. There is a need for an electromagnetic interference suppression device and method for an intelligent high-frequency silicon carbide switching power supply that can balance between the two. Summary of the Invention

[0003] The technical problem to be solved by the present invention is, in view of the above-mentioned defects of the prior art, to provide an electromagnetic interference suppression device for an intelligent high-frequency silicon carbide switching power supply, and also provide an electromagnetic interference suppression method for an intelligent high-frequency silicon carbide switching power supply.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: Construct an electromagnetic interference suppression device for an intelligent high-frequency silicon carbide switching power supply, including a shielding enclosure and a circuit board arranged inside the shielding enclosure. The circuit board is provided with a high-frequency silicon carbide switching power supply module. Among them, the shielding enclosure includes a bottom shell and a face shell. The inner surface of the bottom shell is provided with a first electromagnetic shielding coating, and the inner surface of the face shell is provided with a second electromagnetic shielding coating; a plurality of metal guide posts are arranged on the upper surface edge of the bottom shell, and a plurality of metal guide sleeves matching with the metal guide posts are arranged on the lower surface edge of the face shell; the metal guide posts are electrically connected to the first electromagnetic shielding coating, and the metal guide sleeves are electrically connected to the second electromagnetic shielding coating; an installation seat for installing the circuit board, a lifting unit for driving the face shell to lift, and an intelligent controller are arranged inside the bottom shell. The intelligent controller monitors the state data of the high-frequency silicon carbide switching power supply module being affected by electromagnetic interference, and controls the operation of the lifting unit according to the obtained state data.

[0005] In the electromagnetic interference suppression device for an intelligent high-frequency silicon carbide switching power supply of the present invention, the installation seat is made of a metal material and has an L-shaped cross-section. A hollow groove is arranged in the middle of the surface where the transverse side of the installation seat is located; the circuit board is installed directly above the hollow groove; the intelligent controller is installed on the surface where the longitudinal side of the installation seat is located.

[0006] The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to the present invention, wherein the lifting unit includes a first motor; the first motor is installed on the surface where the longitudinal side of the mounting seat is located, and a fan blade is provided at the movable end of the first motor; the lifting unit further includes a cam and a transverse movement unit for driving the cam to move horizontally, and the transverse movement unit is arranged on the surface shell.

[0007] The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to the present invention, wherein a first arc surface protruding outward is provided at the outer edge of the fan blade, and a second arc surface cooperating with the first arc surface is provided at the edge of the lower surface of the cam.

[0008] The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to the present invention, wherein the transverse movement unit includes a lead screw and a second motor for driving the lead screw; a flexible cable plug electrically connected to the lead screw and the second motor is provided on the surface shell, a socket cooperating with the flexible cable plug is provided on the mounting seat, and the socket is electrically connected to the intelligent controller.

[0009] The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to the present invention, wherein a plurality of reset springs are provided at the upper end of the mounting seat, a screw rod is provided at the upper end of the reset spring, a counterbore is provided on the surface shell, a through hole for the screw rod to pass through is provided on the bottom surface of the counterbore, and a nut for cooperating with and locking the screw rod is provided in the counterbore.

[0010] The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to the present invention, wherein a spline is provided on the rod body of the screw rod, and a keyway cooperating with the spline is provided on the inner wall of the through hole.

[0011] An electromagnetic interference suppression method for an intelligent high-frequency silicon carbide switching power supply, which applies the electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply as described above, wherein the method includes the steps: During operation, the intelligent controller monitors the state data of the high-frequency silicon carbide switching power supply module affected by electromagnetic interference; If the state data is lower than the set safety valve value, control the lifting unit to operate to drive the surface shell to rise to the first height. When the surface shell is at the first height, the metal guide posts still remain in the corresponding metal guide sleeves, and the first electromagnetic shielding coating, a plurality of metal guide posts, a plurality of metal guide sleeves and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the surface shell and the bottom shell; If the status data is higher than the set safety valve value and lower than the set danger valve value, control the lifting unit to operate to drive the face shell to lift and adjust to a second height at which the status data can be restored to be lower than the set safety valve value. The value of the second height is lower than that of the first height. The first electromagnetic shielding coating, multiple metal guide posts, multiple metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the face shell and the bottom shell. If the status data is higher than the set danger valve value, control the lifting unit to operate to drive the face shell and the bottom shell to close.

[0012] The beneficial effects of the present invention are as follows: During operation, the intelligent controller monitors the status data of the high-frequency silicon carbide switching power supply module affected by electromagnetic interference. If the status data is lower than the set safety valve value, control the lifting unit to operate to drive the face shell to rise to the first height. When the face shell is at the first height, the metal guide posts still remain in the corresponding metal guide sleeves. The first electromagnetic shielding coating, multiple metal guide posts, multiple metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the face shell and the bottom shell. If the status data is higher than the set safety valve value and lower than the set danger valve value, control the lifting unit to operate to drive the face shell to lift and adjust to a second height at which the status data can be restored to be lower than the set safety valve value. The value of the second height is lower than that of the first height. The first electromagnetic shielding coating, multiple metal guide posts, multiple metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the face shell and the bottom shell. If the status data is higher than the set danger valve value, control the lifting unit to operate to drive the face shell and the bottom shell to close. By applying the method of the present application, the size of the heat dissipation gap can be effectively adjusted based on the set safety valve value and danger valve value, thereby balancing the electromagnetic shielding protection and the heat dissipation requirements and improving the adaptability of the product. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present invention in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts: Figure 1 It is a cross-sectional view of the intelligent high-frequency silicon carbide switching power supply electromagnetic interference suppression device in a preferred embodiment of the present invention; Figure 2 It is a schematic structural diagram of the mounting seat of the intelligent high-frequency silicon carbide switching power supply electromagnetic interference suppression device in a preferred embodiment of the present invention; Figure 3 It is a flowchart of the intelligent high-frequency silicon carbide switching power supply electromagnetic interference suppression method in a preferred embodiment of the present invention. Detailed Embodiments

[0014] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0015] The electromagnetic interference suppression device of the intelligent high-frequency silicon carbide switching power supply according to a preferred embodiment of the present invention is as Figure 1 shown, and also refer to Figure 2 , which includes a shielding housing 1 and a circuit board 2 arranged in the shielding housing 1. The circuit board 2 is provided with a high-frequency silicon carbide switching power supply module 3. The shielding housing 1 includes a bottom case 10 and a top case 11. The inner surface of the bottom case 10 is provided with a first electromagnetic shielding coating 100, and the inner surface of the top case 11 is provided with a second electromagnetic shielding coating 110; a plurality of metal guide posts 101 are arranged on the edge of the upper surface of the bottom case 10, and a plurality of metal guide sleeves 111 that cooperate with the metal guide posts are arranged on the edge of the lower surface of the top case 11; the metal guide posts 101 are electrically connected to the first electromagnetic shielding coating 100, and the metal guide sleeves 111 are electrically connected to the second electromagnetic shielding coating 110; an installation seat 7 for installing the circuit board 2, a lifting unit for driving the top case 11 to lift, and an intelligent controller 5 are arranged in the bottom case 10. The intelligent controller 5 monitors the state data of the high-frequency silicon carbide switching power supply module 3 being affected by electromagnetic interference, and controls the operation of the lifting unit based on the obtained state data; During operation, the intelligent controller 5 monitors the state data of the high-frequency silicon carbide switching power supply module 3 being affected by electromagnetic interference; if the state data is lower than the set safety threshold value, it controls the lifting unit to operate to drive the top case 11 to rise to a first height. When the top case 11 is at the first height, the metal guide posts 101 are still located in the corresponding metal guide sleeves 111. The first electromagnetic shielding coating 100, the plurality of metal guide posts 101, the plurality of metal guide sleeves 111, and the second electromagnetic shielding coating 110 form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the top case 11 and the bottom case 10; if the state data is higher than the set safety threshold value and lower than the set danger threshold value, it controls the lifting unit to operate to drive the top case 11 to lift and adjust to a second height that can make the state data return to a value lower than the set safety threshold value. The value of the second height is lower than the value of the first height; the first electromagnetic shielding coating 100, the plurality of metal guide posts 101, the plurality of metal guide sleeves 111, and the second electromagnetic shielding coating 110 form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap (smaller than the previous gap) is formed between the top case 11 and the bottom case 10; if the state data is higher than the set danger threshold value, it controls the lifting unit to operate to drive the top case 11 to close with the bottom case 10; By applying the methods of the present application, the size of the heat dissipation gap can be effectively adjusted based on the set safety valve value and danger valve value, thereby balancing the electromagnetic shielding protection and heat dissipation requirements and improving the adaptability of the product; it is especially suitable for applications in scenarios where the electromagnetic interference intensity changes, such as in a computer room with a relatively dense equipment layout.

[0016] Preferably, the mounting base 7 is made of a metal material and has an L-shaped cross-section. A hollow groove 70 is provided in the middle of the surface where the transverse side of the mounting base 7 is located; the circuit board 2 is installed directly above the hollow groove 70; an intelligent controller 5 is installed on the surface where the longitudinal side of the mounting base 7 is located; the lifting unit includes a first motor 40; the first motor 40 is installed on the surface where the longitudinal side of the mounting base 7 is located, and a fan blade 41 is provided at the movable end of the first motor 40; the lifting unit further includes a cam 42 and a transverse movement unit 43 for driving the cam to move horizontally, and the transverse movement unit 43 is arranged on the front shell; the outer edge of the fan blade 41 is provided with a convex first arc surface 410, and the lower surface edge of the cam 42 is provided with a second arc surface 420 that cooperates with the first arc surface 410; During use, there are two modes, one is the active heat dissipation mode and the other is the adjustment mode; In the adjustment mode, the transverse movement unit 43 drives the cam 42 to move directly above the fan blade 41. The first motor 40 drives the fan blade 41 to rotate. By relying on the cooperation of the first arc surface 410 and the second arc surface 420, a cam assembly is formed to complete the adjustment of the height of the front shell (at this time, heat dissipation is carried out according to the heat dissipation gap described in the previous text); When adjustment is not required, the front shell descends under its own weight and fits against the bottom shell. At this time, the transverse movement unit 43 drives the cam 42 to move away from directly above the fan blade 41, and the first motor 40 drives the fan blade 41 to rotate to perform fan heat dissipation on the circuit board 2, avoiding heat accumulation on the circuit board (after the heat quickly spreads in the shielding shell 1, heat conduction dissipation is carried out between the shielding shell 1 and the outside); While providing an installation platform, the mounting base 7 is also used to dissipate the heat on the circuit board 2.

[0017] Preferably, the transverse movement unit 43 includes a lead screw 430 and a second motor 431 for driving the lead screw; a flexible cable plug 432 electrically connected to the lead screw and the second motor is provided on the front shell 11, and a socket 71 that cooperates with the flexible cable plug 432 is provided on the mounting base 7. The socket 71 is electrically connected to the intelligent controller 5; during installation, the flexible cable plug 432 is first inserted into the socket 71 in a corresponding manner, and then the front shell 11 is assembled; the structure is simple and convenient to operate.

[0018] Preferably, a plurality of reset springs 72 are provided at the upper end of the mounting base 7. A screw rod 73 is provided at the upper end of the reset spring 72. A counterbore 112 is provided on the front shell 11. A through hole for the screw rod 73 to pass through is provided on the bottom surface of the counterbore 112. A nut 114 that cooperates with and locks the screw rod 73 is provided in the counterbore 112; a spline 74 is provided on the rod body of the screw rod 73, and a keyway 115 that cooperates with the spline 74 is provided on the inner wall of the through hole; During installation, pass the screw rod 73 through the through hole, and rely on the cooperation of the spline 74 and the keyway 115 to prevent the screw rod 73 from rotating axially. Then lock and install the nut 114 with the screw rod; after installation, the multiple springs 72 pull the front shell 11. When the front shell 11 is pushed up, the springs 72 are stretched, providing a reset force for the front shell 11 to ensure the reliability of state switching and making the assembly very convenient.

[0019] A method for suppressing electromagnetic interference of an intelligent high-frequency silicon carbide switching power supply, which applies the intelligent high-frequency silicon carbide switching power supply electromagnetic interference suppression device as described above, as Figure 3 shown, the method includes the steps: S01: During operation, the intelligent controller monitors the state data of the high-frequency silicon carbide switching power supply module that is affected by electromagnetic interference; S02: If the state data is lower than the set safety valve value, control the lifting unit to operate to drive the front shell to rise to the first height. When the front shell is at the first height, the metal guide posts still remain in the corresponding metal guide sleeves. The first electromagnetic shielding coating, the multiple metal guide posts, the multiple metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the front shell and the bottom shell; S03: If the state data is higher than the set safety valve value and lower than the set danger valve value, control the lifting unit to operate to drive the front shell to lift and adjust to the second height that can make the state data return to a value lower than the set safety valve value. The value of the second height is lower than the value of the first height; the first electromagnetic shielding coating, the multiple metal guide posts, the multiple metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the front shell and the bottom shell; S04: If the state data is higher than the set danger valve value, control the lifting unit to operate to drive the front shell and the bottom shell to close; By applying the method of the present application, the size of the heat dissipation gap can be effectively adjusted based on the set safety valve value and danger valve value, thereby balancing the electromagnetic shielding protection and the heat dissipation requirements and improving the adaptability of the product; it is especially suitable for applications in scenarios where the electromagnetic interference intensity will change, such as in a computer room with a relatively dense equipment layout, etc.

[0020] It should be understood that for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. An electromagnetic interference suppression device for an intelligent high-frequency silicon carbide switching power supply, comprising a shielding housing and a circuit board arranged inside the shielding housing, the circuit board being provided with a high-frequency silicon carbide switching power supply module, characterized in that, The shielding housing includes a bottom case and a top case. The inner surface of the bottom case is provided with a first electromagnetic shielding coating, and the inner surface of the top case is provided with a second electromagnetic shielding coating. A plurality of metal guide posts are provided at the edge of the upper surface of the bottom case, and a plurality of metal guide sleeves are provided at the edge of the lower surface of the top case and are matched with the metal guide posts. The metal guide posts are electrically connected to the first electromagnetic shielding coating, and the metal guide sleeves are electrically connected to the second electromagnetic shielding coating. An installation seat for installing the circuit board, a lifting unit for driving the top case to lift, and an intelligent controller are arranged in the bottom case. The intelligent controller monitors the state data of the high-frequency silicon carbide switching power supply module being affected by electromagnetic interference, and controls the operation of the lifting unit according to the obtained state data.

2. The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to claim 1, characterized in that, The installation seat is made of a metal material and has an L-shaped cross-section. A hollow groove is provided in the middle of the surface where the transverse side of the installation seat is located. The circuit board is installed directly above the hollow groove. The intelligent controller is installed on the surface where the longitudinal side of the installation seat is located.

3. The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to claim 2, wherein The lifting unit includes a first motor. The first motor is installed on the surface where the longitudinal side of the installation seat is located, and a fan blade is provided at the movable end of the first motor. The lifting unit further includes a cam and a transverse movement unit for driving the cam to move horizontally. The transverse movement unit is arranged on the top case.

4. The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to claim 3, characterized in that, The outer edge of the fan blade is provided with a first convex arc surface, and the lower surface edge of the cam is provided with a second arc surface that cooperates with the first arc surface.

5. The electromagnetic interference suppression device for intelligent high-frequency silicon carbide switching power supply according to claim 3, wherein The transverse movement unit includes a lead screw and a second motor for driving the lead screw. A flexible cable plug electrically connected to the lead screw and the second motor is provided on the top case, and a socket matched with the flexible cable plug is provided on the installation seat. The socket is electrically connected to the intelligent controller.

6. The electromagnetic interference suppression device for the intelligent high-frequency silicon carbide switching power supply according to claim 2, wherein A plurality of reset springs are provided at the upper end of the installation seat. The upper end of the reset spring is provided with a screw rod. A counterbore is provided on the top case, and a through hole for the screw rod to pass through is provided on the bottom surface of the counterbore. A nut for locking in cooperation with the screw rod is provided in the counterbore.

7. The electromagnetic interference suppression device for intelligent high-frequency silicon carbide switching power supply according to claim 6, wherein A spline is provided on the rod body of the screw rod, and a key groove for cooperating with the spline is provided on the inner wall of the through hole.

8. A method for suppressing electromagnetic interference of an intelligent high-frequency silicon carbide switching power supply, which applies the intelligent high-frequency silicon carbide switching power supply electromagnetic interference suppression device as described in any one of claims 1-7, characterized in that, The method includes the steps: During operation, the intelligent controller monitors the state data of the high-frequency silicon carbide switching power supply module being affected by electromagnetic interference; If the state data is lower than the set safety threshold value, the lifting unit is controlled to operate to drive the top case to rise to a first height. When the top case is at the first height, the metal guide posts are still located in the corresponding metal guide sleeves. The first electromagnetic shielding coating, the plurality of metal guide posts, the plurality of metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the top case and the bottom case; If the state data is higher than the set safety threshold value and lower than the set danger threshold value, the lifting unit is controlled to operate to drive the top case to lift and adjust to a second height that can make the state data return to a value lower than the set safety threshold value. The value of the second height is lower than the value of the first height. The first electromagnetic shielding coating, the plurality of metal guide posts, the plurality of metal guide sleeves, and the second electromagnetic shielding coating form an electromagnetic shielding network for electromagnetic shielding protection, and a heat dissipation gap is formed between the top case and the bottom case; If the status data is higher than the set dangerous threshold value, control the lifting unit to operate to drive the front shell and the bottom shell to close.

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