A permanent magnet direct current inductor

Abstract

The application relates to the technical field of direct-current inductors, and discloses a permanent-magnet direct-current inductor which comprises a circuit board, a mounting frame is arranged on the top of the circuit board, a transmission assembly is arranged on the top of the circuit board, a gas guide assembly is arranged on the top of the circuit board, a heat dissipation assembly is arranged on the outer wall of the mounting frame, and a magnetic core is arranged in the inner cavity of the mounting frame. The permanent-magnet direct-current inductor is provided with the transmission assembly arranged at the bottom of the mounting frame, in the process of mechanical vibration of the mounting frame, the transmission assembly can push the rotation of the rotating plate and the rotating plate, so that the moving block and the sliding block can slide along the outer wall of the supporting rod, and then the supporting spring is compressed; at this time, the supporting spring and the supporting column can play the roles of fixing and limiting the inductor, and the vibration of the inductor is prevented from being transmitted downward, the hard connection between the traditional inductor and the circuit board is avoided, and the vibration generated by the inductor is prevented from being transmitted downward to the circuit board, so that the circuit board is not affected.

Description

Technical Field

[0001] This invention relates to the field of DC inductor technology, specifically to a permanent magnet DC inductor. Background Technology

[0002] An inductor is a component that converts electrical energy into magnetic energy and stores it. The structure of an inductor is similar to a transformer, but it has only one winding. An inductor has a certain inductance; it only impedes changes in current. If no current is flowing through the inductor, it will attempt to impede the current flow when the circuit is closed; if current is flowing through the inductor, it will attempt to maintain a constant current when the circuit is open. Inductors are also called chokes or dynamic reactors. Permanent magnet DC inductors are a type of inductor.

[0003] Traditional inductors are typically mounted directly on a circuit board, connecting them to the circuitry. During operation, changes in the current cause variations in the inductor's internal magnetic field, resulting in electromagnetic forces acting on the windings. This causes the inductor to vibrate on top of the circuit board. Since traditional inductors are often rigidly fixed to the top, this vibration is transmitted downwards to the board, affecting both the board and the inductor's normal operation. Furthermore, inductors generate significant heat during use, and traditional devices lack active cooling, leading to higher inductor temperatures and shortening their lifespan. Summary of the Invention

[0004] This invention provides a permanent magnet DC inductor that solves the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a permanent magnet DC inductor, comprising a circuit board, a mounting bracket mounted on the top of the circuit board, a transmission assembly provided on the top of the circuit board, a gas guiding assembly provided on the top of the circuit board, a heat dissipation assembly provided on the outer wall of the mounting bracket, a magnetic core mounted in the inner cavity of the mounting bracket, a coil mounted on the outer wall of the magnetic core, and a support column fixedly mounted on the top of the circuit board.

[0006] As a preferred embodiment of the present invention: the transmission assembly includes a limiting rod, a rotating plate rotatably connected to the outer wall of the limiting rod, a rotating plate rotatably connected to the outer wall of the limiting rod, a slider rotatably connected to the outer wall of the rotating plate, a moving block rotatably connected to the outer wall of the rotating plate, a support rod installed on the top of the circuit board, a support spring movably sleeved on the outer wall of the support rod, a fixing plate fixedly assembled on the outer wall of the moving block, and a connecting plate fixedly assembled on the outer wall of the slider.

[0007] As a preferred embodiment of the present invention: the two ends of the outer wall of the support spring are in contact with the outer walls of the movable block, the slider and the support rod respectively, and the support spring is made of high carbon steel, and the slider and the movable block are respectively movably sleeved on the outer wall of the support rod.

[0008] As a preferred technical solution of the present invention: the air guiding assembly includes an air collecting cylinder, a movable rod is movably sleeved in the inner cavity of the air collecting cylinder, a piston plate is fixedly mounted on the outer wall of the movable rod, an air vent is opened on the outer wall of the piston plate, a one-way valve plate is rotatably connected to the outer wall of the piston plate, and a connecting pipe is fixedly mounted on the outer wall of the air collecting cylinder.

[0009] As a preferred technical solution of the present invention: the outer wall of the movable rod is connected to the outer wall of the connecting plate, the outer wall diameter of the piston plate is adapted to the inner wall diameter of the gas collecting cylinder, there are two movable rods, and the two movable rods are respectively movably sleeved at both ends of the inner cavity of the gas collecting cylinder, and the outer wall shape of the one-way valve plate is larger than the inner wall shape of the vent hole.

[0010] As a preferred embodiment of the present invention: the heat dissipation assembly includes a mounting frame, a heat-conducting plate is installed in the inner cavity of the mounting frame, heat sinks are fixedly mounted on the outer wall of the heat-conducting plate, a rotating shaft is rotatably connected to the inner cavity of the mounting frame, a cooling fan is fixedly mounted on the outer wall of the rotating shaft, an air guide impeller is fixedly mounted on the outer wall of the rotating shaft, blades are fixedly mounted on the outer wall of the air guide impeller, a sealing box is fixedly mounted on the outer wall of the mounting frame, and an air inlet box is fixedly mounted on the outer wall of the sealing box.

[0011] As a preferred embodiment of the present invention: the outer wall of the heat-conducting plate is in contact with the outer wall of the magnetic core, and both the heat-conducting plate and the heat sink are made of copper. The inner cavity of the air inlet box is connected to the inner cavity of the sealing box. The outer wall of the rotating shaft passes through the inner cavity of the sealing box. The air guide impeller is rotatably connected to the inner cavity of the sealing box. The installation position of the cooling fan corresponds to the installation position of the heat sink.

[0012] As a preferred embodiment of the present invention: the connecting pipe is made of natural rubber, the inner cavity of the connecting pipe is connected to the inner cavity of the gas collecting cylinder, and the connecting pipe is installed in the middle of the outer wall of the gas collecting cylinder.

[0013] As a preferred embodiment of the present invention: the outer wall of the support column passes through the bottom of the mounting frame, the bottom of the mounting frame is connected to the top of the limiting rod, and the top of the circuit board is connected to the outer wall of the gas collecting cylinder.

[0014] As a preferred embodiment of the present invention: the inner wall diameter of the sealing box is larger than the outer wall diameter of the air guide impeller, the blades are made of stainless steel, and the inner cavity of the air inlet box is connected to the inner cavity of the connecting pipe.

[0015] The present invention has the following beneficial effects:

[0016] 1. This permanent magnet DC inductor, through a transmission component set at the bottom of the mounting bracket, causes the mounting bracket to vibrate under the action of electromagnetic force. During the mechanical vibration of the mounting bracket, it drives the rotating plate and the rotating plate to rotate, thereby allowing the moving block and the slider to slide along the outer wall of the support rod, which in turn compresses the support spring. At this time, the support spring and the support column can fix and limit the inductor, and prevent the vibration of the inductor from being transmitted downward. This avoids the traditional rigid connection between the inductor and the circuit board, which would cause the vibration generated by the inductor to be transmitted downward to the circuit board and affect the circuit board.

[0017] 2. This permanent magnet DC inductor uses a connecting plate on the outer wall of the slider. As the slider moves, the connecting plate moves, which in turn drives the movable rod and piston plate. During the reciprocating motion of the piston plate, the one-way valve plate rotates, allowing external air to enter the air collecting cylinder. The air inside the air collecting cylinder cannot escape outward, thus continuously ventilating the air intake box. This drives the air guide impeller, which in turn drives the rotating shaft to rotate, causing the cooling fan to rotate. This accelerates the airflow around the heat sink and, with the help of the heat sink and heat conduction plate, provides auxiliary cooling for the magnetic core and coil. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the circuit board structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the support column structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the limiting rod structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the gas collecting cylinder structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the piston plate structure of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the mounting frame of the present invention;

[0025] Figure 8 This is a schematic diagram of the heat-conducting plate structure of the present invention;

[0026] Figure 9 This is a schematic diagram of the air guide impeller structure of the present invention;

[0027] Figure 10 This is a schematic diagram of the air guide vane structure of the present invention.

[0028] In the diagram: 1. Circuit board; 2. Mounting bracket; 3. Transmission assembly; 4. Air guide assembly; 5. Heat dissipation assembly; 6. Magnetic core; 7. Coil; 8. Support column;

[0029] 301. Limiting rod; 302. Rotating plate; 303. Rotating plate; 304. Moving block; 305. Sliding block; 306. Support rod; 307. Support spring; 308. Connecting plate; 309. Fixing plate;

[0030] 401. Gas collecting cylinder; 402. Movable rod; 403. Piston plate; 404. Vent hole; 405. One-way valve plate; 406. Connecting pipe;

[0031] 501. Mounting frame; 502. Heat-conducting plate; 503. Heat sink; 504. Rotating shaft; 505. Cooling fan; 506. Air guide impeller; 507. Blade; 508. Sealing box; 509. Air inlet box. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 - Figure 10 A permanent magnet DC inductor includes a circuit board 1, a mounting bracket 2 mounted on the top of the circuit board 1, a transmission assembly 3 provided on the top of the circuit board 1, a gas guiding assembly 4 provided on the top of the circuit board 1, a heat dissipation assembly 5 provided on the outer wall of the mounting bracket 2, a magnetic core 6 installed in the inner cavity of the mounting bracket 2, a coil 7 installed on the outer wall of the magnetic core 6, and a support column 8 fixedly mounted on the top of the circuit board 1.

[0034] In the above structure, the mounting bracket 2 set on the top of the circuit board 1 and the magnetic core 6 set in the inner cavity of the mounting bracket 2 form an inductor under the action of the magnetic core 6 and the coil 7, thereby removing the filter in the circuit, thus providing a stable DC power supply for the electronic device and ensuring the stable operation of the circuit.

[0035] In a preferred embodiment: the transmission assembly 3 includes a limiting rod 301, a rotating plate 302 rotatably connected to the outer wall of the limiting rod 301, a rotating plate 303 rotatably connected to the outer wall of the limiting rod 301, a slider 305 rotatably connected to the outer wall of the rotating plate 303, a moving block 304 rotatably connected to the outer wall of the rotating plate 302, a support rod 306 mounted on the top of the circuit board 1, a support spring 307 movably sleeved on the outer wall of the support rod 306, a fixing plate 309 fixedly mounted on the outer wall of the moving block 304, and a connecting plate 308 fixedly mounted on the outer wall of the slider 305.

[0036] In the above structure, the limiting rod 301, the rotating plate 303 and the moving block 304 on the outer wall of the limiting rod 301, and the electromagnetic force generated when the current in the circuit changes when the mounting frame 2 is in use will affect the mounting frame 2, causing the mounting frame 2 to vibrate. At this time, as the mounting frame 2 moves up and down, it will drive the rotating plate 303 and the rotating plate 302, causing the angle between the rotating plate 303 and the rotating plate 302 to change.

[0037] In a preferred embodiment: the two ends of the outer wall of the support spring 307 are in contact with the outer walls of the movable block 304, the slider 305 and the support rod 306 respectively, and the support spring 307 is made of high carbon steel, and the slider 305 and the movable block 304 are respectively movably sleeved on the outer wall of the support rod 306.

[0038] In the above structure, by connecting the top of the limiting rod 301 to the bottom of the mounting frame 2, when the mounting frame 2 vibrates under the influence of electromagnetic force, the vibration can be transmitted downward to the outer wall of the limiting rod 301. This allows the limiting rod 301 to push the rotating plate 303 and the rotating plate 302 to change the angle, and to compress the support springs 307 at both ends of the outer wall of the support rod 306. Furthermore, when the mounting frame 2 is stationary, the support springs 307 can support the moving block 304 and the slider 305.

[0039] In a preferred embodiment: the air guiding assembly 4 includes an air collecting cylinder 401, a movable rod 402 is movably sleeved in the inner cavity of the air collecting cylinder 401, a piston plate 403 is fixedly mounted on the outer wall of the movable rod 402, an air vent 404 is opened on the outer wall of the piston plate 403, a one-way valve plate 405 is rotatably connected to the outer wall of the piston plate 403, and a connecting pipe 406 is fixedly mounted on the outer wall of the air collecting cylinder 401.

[0040] In the above structure, the movable rod 402 is installed in the inner cavity of the gas collecting cylinder 401, and the piston plate 403 is installed on the outer wall of the movable rod 402. Since the outer wall of the movable rod 402 is connected to the outer wall of the connecting plate 308, the movable rod 402 will also reciprocate in the inner cavity of the gas collecting cylinder 401 as the slider 305 and the connecting plate 308 move. During the reciprocating motion of the movable rod 402, gas will be continuously supplied into the inner cavity of the gas collecting cylinder 401 under the action of the piston plate 403.

[0041] In a preferred embodiment: the outer wall of the movable rod 402 is connected to the outer wall of the connecting plate 308, the outer diameter of the piston plate 403 is adapted to the inner diameter of the gas collecting cylinder 401, there are two movable rods 402, and the two movable rods 402 are respectively movably sleeved at both ends of the inner cavity of the gas collecting cylinder 401, and the outer shape of the one-way valve plate 405 is larger than the inner shape of the vent hole 404.

[0042] In the above structure, the movable rod 402 and piston plate 403 installed in the inner cavity of the air collecting cylinder 401 continuously supply air into the inner cavity of the air collecting cylinder 401 during the continuous reciprocating motion of the movable rod 402 and piston plate 403. The air then enters the connecting pipe 406 through the inner cavity of the air collecting cylinder 401, and is pushed into the inner cavity of the air inlet box 509 by the connecting pipe 406. This drives the rotating shaft 504 in the inner cavity of the air guide impeller 506. The one-way valve plate 405 installed on the outer wall of the vent hole 404 can only rotate in one direction.

[0043] In a preferred embodiment: the heat dissipation assembly 5 includes a mounting frame 501, a heat-conducting plate 502 is mounted in the inner cavity of the mounting frame 2, a heat sink 503 is fixedly mounted on the outer wall of the heat-conducting plate 502, a rotating shaft 504 is rotatably connected to the inner cavity of the mounting frame 501, a cooling fan 505 is fixedly mounted on the outer wall of the rotating shaft 504, an air guide impeller 506 is fixedly mounted on the outer wall of the rotating shaft 504, blades 507 are fixedly mounted on the outer wall of the air guide impeller 506, a sealing box 508 is fixedly mounted on the outer wall of the mounting frame 501, and an air inlet box 509 is fixedly mounted on the outer wall of the sealing box 508.

[0044] In the above structure, by installing a heat-conducting plate 502 and a heat sink 503 on the outer wall of the mounting bracket 2, during the use of the magnetic core 6 and the coil 7, the outer wall of the heat-conducting plate 502 is in contact with the outer wall of the magnetic core 6 and the coil 7, so that the heat generated by the magnetic core 6 and the coil 7 during operation can be transferred to the heat-conducting plate 502 and the heat sink 503, and the heat generated can be released to the outside through the heat-conducting plate 502 and the heat sink 503, so as to play an auxiliary role in heat dissipation for the magnetic core 6 and the coil 7.

[0045] In a preferred embodiment: the outer wall of the heat-conducting plate 502 is in contact with the outer wall of the magnetic core 6, and both the heat-conducting plate 502 and the heat sink 503 are made of copper. The inner cavity of the air inlet box 509 is connected to the inner cavity of the sealing box 508. The outer wall of the rotating shaft 504 passes through the inner cavity of the sealing box 508. The air guide impeller 506 is rotatably connected to the inner cavity of the sealing box 508. The installation position of the cooling fan 505 corresponds to the installation position of the heat sink 503.

[0046] In the above structure, the cooling fan 505 and the air guide impeller 506 installed on the outer wall of the rotating shaft 504 supply the gas in the inner cavity of the air collecting cylinder 401 into the inner cavity of the connecting pipe 406 during the reciprocating motion of the movable rod 402. The gas then enters the inner cavity of the air inlet box 509 along the inner cavity of the connecting pipe 406, thereby driving the air guide impeller 506. This causes the rotating shaft 504 to rotate with the rotation of the air guide impeller 506, which in turn drives the rotation of the cooling fan 505. During the rotation of the cooling fan 505, the heat around the heat sink 503 and the heat conduction plate 502 is carried away.

[0047] In a preferred embodiment: the connecting pipe 406 is made of natural rubber, the inner cavity of the connecting pipe 406 communicates with the inner cavity of the gas collecting cylinder 401, and the connecting pipe 406 is installed at the middle of the outer wall of the gas collecting cylinder 401.

[0048] In the above structure, through the connecting pipe 406 set in the middle of the outer wall of the gas collecting cylinder 401, when the movable rod 402 moves towards the middle of the gas collecting cylinder 401, the gas will be squeezed into the middle of the gas collecting cylinder 401 and enter the inner cavity of the connecting pipe 406. When the movable rod 402 moves towards both ends of the gas collecting cylinder 401, the one-way valve plate 405 will open, so that the air in the inner cavity of the connecting pipe 406 will not be drawn out. Therefore, during the continuous reciprocating motion of the movable rod 402, the air in the inner cavity of the connecting pipe 406 will not be drawn out, but only gas will be supplied to the inner cavity of the connecting pipe 406.

[0049] In a preferred embodiment: the outer wall of the support column 8 passes through the bottom of the mounting frame 2, the bottom of the mounting frame 2 is connected to the top of the limiting rod 301, and the top of the circuit board 1 is connected to the outer wall of the air collecting cylinder 401.

[0050] In the above structure, the support column 8 set on the top of the circuit board 1 can restrict the mounting frame 2 under the action of the support column 8, so that the mounting frame 2 can only float up and down on the top of the circuit board 1, thereby driving the rotating plate 303 and the rotating plate 302, and then pulling the movable rod 402 to move.

[0051] In a preferred embodiment: the inner diameter of the sealing box 508 is larger than the outer diameter of the air guide impeller 506, the blade 507 is made of stainless steel, and the inner cavity of the air inlet box 509 is connected to the inner cavity of the connecting pipe 406.

[0052] In the above structure, the sealing box 508 provided on the outer wall of the mounting frame 501 can seal the air guide impeller 506 under the action of the sealing box 508, so that the air guide impeller 506 can be better driven by the gas in the inner cavity of the sealing box 508, so that the air guide impeller 506 and the rotating shaft 504 can rotate in the inner cavity of the sealing box 508, thereby driving the cooling fan 505. During the rotation of the cooling fan 505, the heat around the heat sink 503 and the heat conduction plate 502 is dissipated to the outside, thereby playing an auxiliary role in cooling the magnetic core 6 and the coil 7.

[0053] Working principle: During use, the mounting bracket 2 is installed on top of the circuit board 1. As the current in the circuit changes, the magnetic field inside the magnetic core 6 changes, causing the coil 7 to be subjected to electromagnetic force. Under this force, the mounting bracket 2 floats on top of the circuit board 1. With the continuous change in current, the mounting bracket 2 vibrates on top of the circuit board 1, causing it to move up and down along the outer wall of the support column 8. This vibration transmits downwards to the limiting rod 301, causing it to move downwards. This, in turn, changes the support angle between the rotating plate 303 and the rotating plate 302, thereby pushing the slider 305 and... The movement of the movable block 304 causes the slider 305 and the movable block 304 to move along the outer wall of the support rod 306. During the movement of the slider 305 and the movable block 304, the support spring 307 is compressed, and the connecting plate 308 moves with the slider 305. Since the outer wall of the connecting plate 308 is connected to the outer wall of the movable rod 402, the movable rod 402 moves with the movement of the connecting plate 308. When the movable rod 402 moves, it pulls the piston plate 403, causing the piston plate 403 to reciprocate within the cavity of the air collecting cylinder 401. When the piston plate 403 moves towards both ends of the air collecting cylinder 401, the one-way valve plate 405 rotates, opening the cavity of the vent hole 404 and allowing air to collect. Air from outside the cylinder 401 enters the inner cavity of the air collecting cylinder 401. When the piston plate 403 moves to the middle position of the air collecting cylinder 401, the one-way valve plate 405 will adhere to the outer wall of the piston plate 403 and cannot rotate, thus blocking the inner cavity of the vent hole 404. Then, with the movement of the movable rod 402 and the piston plate 403, the external air is forced into the inner cavity of the air collecting cylinder 401 and transmitted upwards through the connecting pipe 406, allowing the air to enter the inner cavity of the air inlet box 509 and be released into the inner cavity of the sealing box 508. At this point, the air drives the air guide impeller 506 in the inner cavity of the sealing box 508, causing the air guide impeller 506 to drive the rotation of the rotating shaft 504, thereby… The rotating shaft 504 drives the cooling fan 505, causing it to rotate within the cavity of the mounting frame 501. During the use of the mounting bracket 2, the magnetic core 6 and coil 7 continuously generate heat. The heat is transferred to the air by the heat-conducting plate 502 and heat sink 503 located on the outer walls of the magnetic core 6 and coil 7. As the cooling fan 505 rotates, it carries away heat from the air surrounding the heat sink 503, accelerating the airflow and thus providing auxiliary cooling for the mounting bracket 2. Furthermore, during the up-and-down movement of the mounting bracket 2, it is buffered by the rotating plate 303 and rotating plate 302, as well as the slider 305 and moving block 304.This prevents vibrations from being transmitted downwards, thus avoiding any impact on the normal operation of circuit board 1.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet DC inductor, comprising a circuit board (1), characterized in that: The top of the circuit board (1) is equipped with a mounting bracket (2), the top of the circuit board (1) is provided with a transmission component (3), the top of the circuit board (1) is provided with a gas guiding component (4), the outer wall of the mounting bracket (2) is provided with a heat dissipation component (5), the inner cavity of the mounting bracket (2) is equipped with a magnetic core (6), the outer wall of the magnetic core (6) is equipped with a coil (7), and the top of the circuit board (1) is fixedly equipped with a support column (8). The transmission assembly (3) includes a limit rod (301), a rotating plate (302) is rotatably connected to the outer wall of the limit rod (301), a rotating plate (303) is rotatably connected to the outer wall of the limit rod (301), a slider (305) is rotatably connected to the outer wall of the rotating plate (303), a moving block (304) is rotatably connected to the outer wall of the rotating plate (302), a support rod (306) is installed on the top of the circuit board (1), a support spring (307) is movably sleeved on the outer wall of the support rod (306), a fixing plate (309) is fixedly assembled on the outer wall of the moving block (304), and a connecting plate (308) is fixedly assembled on the outer wall of the slider (305). The air guiding assembly (4) includes an air collecting cylinder (401), a movable rod (402) is movably sleeved in the inner cavity of the air collecting cylinder (401), a piston plate (403) is fixedly mounted on the outer wall of the movable rod (402), an air vent (404) is opened on the outer wall of the piston plate (403), a one-way valve plate (405) is rotatably connected to the outer wall of the piston plate (403), and a connecting pipe (406) is fixedly mounted on the outer wall of the air collecting cylinder (401). The outer wall of the movable rod (402) is connected to the outer wall of the connecting plate (308), the outer wall diameter of the piston plate (403) is equal to the inner wall diameter of the gas collecting cylinder (401), there are two movable rods (402), and the two movable rods (402) are respectively movably sleeved at both ends of the inner cavity of the gas collecting cylinder (401), and the outer wall shape of the one-way valve plate (405) is larger than the inner wall shape of the vent hole (404); The heat dissipation assembly (5) includes a mounting frame (501), a heat-conducting plate (502) is installed in the inner cavity of the mounting bracket (2), a heat sink (503) is fixedly mounted on the outer wall of the heat-conducting plate (502), a rotating shaft (504) is rotatably connected to the inner cavity of the mounting frame (501), a cooling fan (505) is fixedly mounted on the outer wall of the rotating shaft (504), an air guide impeller (506) is fixedly mounted on the outer wall of the rotating shaft (504), blades (507) are fixedly mounted on the outer wall of the air guide impeller (506), a sealing box (508) is fixedly mounted on the outer wall of the mounting frame (501), and an air inlet box (509) is fixedly mounted on the outer wall of the sealing box (508). The inner diameter of the sealing box (508) is larger than the outer diameter of the air guide impeller (506), the blade (507) is made of stainless steel, and the inner cavity of the air inlet box (509) is connected to the inner cavity of the connecting pipe (406).

2. A permanent magnet DC inductor according to claim 1, characterized in that: The outer ends of the support spring (307) are in contact with the outer walls of the movable block (304), the slider (305) and the support rod (306), respectively. The support spring (307) is made of high carbon steel. The slider (305) and the movable block (304) are respectively movably sleeved on the outer wall of the support rod (306).

3. A permanent magnet DC inductor according to claim 1, characterized in that: The outer wall of the heat-conducting plate (502) is in contact with the outer wall of the magnetic core (6), and both the heat-conducting plate (502) and the heat sink (503) are made of copper. The inner cavity of the air inlet box (509) is connected to the inner cavity of the sealing box (508). The outer wall of the rotating shaft (504) passes through the inner cavity of the sealing box (508). The air guide impeller (506) is rotatably connected to the inner cavity of the sealing box (508). The installation position of the cooling fan (505) corresponds to the installation position of the heat sink (503).

4. A permanent magnet DC inductor according to claim 3, characterized in that: The connecting pipe (406) is made of natural rubber. The inner cavity of the connecting pipe (406) is connected to the inner cavity of the gas collecting cylinder (401), and the connecting pipe (406) is installed in the middle of the outer wall of the gas collecting cylinder (401).

5. A permanent magnet DC inductor according to claim 4, characterized in that: The outer wall of the support column (8) passes through the bottom of the mounting bracket (2), the bottom of the mounting bracket (2) is connected to the top of the limiting rod (301), and the top of the circuit board (1) is connected to the outer wall of the gas collecting cylinder (401).

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