Annular inductor
By designing the support boss and vent holes in the inductor to form an annular airway and sidewall airway, combining the fixing method of rib strips and elastic parts, the magnetic characteristics decay and shaking caused by the rise in the magnetic core temperature are solved, and the magnetic properties are shaking are achieved. Efficient heat dissipation and stable assembly reduce costs and resource waste.
Patent Information
- Application Number
- CN202411306090.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2024-12-27
AI Technical Summary
The magnetic properties of existing inductors deteriorate when the core temperature rises, resulting in a degradation of performance, and there is a shaking problem when the core is assembled with the plastic case. The current solutions increase product costs and resource waste.
A ring inductor is designed, and the upper and lower end surfaces of the magnetic core accommodating cavity are equipped with supporting bosses and ventilation holes to form an annular airway and a side wall airway, which improves heat dissipation effect through air circulation and is fixed by ribs and elastic parts. Magnetic core to avoid shaking.
Without increasing costs and resource waste, the core temperature rise is effectively reduced, the magnetic characteristics decay and core shaking are avoided, and the performance and stability of the inductor are improved.
Smart Images
Figure CN119207967A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of inductors, and in particular to a toroidal inductor. Background Art
[0002] In the field of inductors, due to the inherent physical properties of the magnetic materials of inductors, when the core temperature rises to a certain temperature range, the magnetic properties will decline significantly, seriously affecting the performance of the magnetic components. In order to avoid the temperature range of magnetic property decline, current inductors are usually made by increasing the cross-sectional area of the conductor to reduce the core operating temperature rise and below the decline temperature, thereby avoiding the decline of magnetic properties; however, this method leads to a significant increase in product costs and waste of resources.
[0003] On the other hand, due to the physical properties of magnetic materials or process factors, the sizes of magnetic cores of the same specification have certain deviations. Usually, the matching plastic shell size needs to reserve a certain size space to ensure the smooth assembly of the magnetic core and the plastic shell; but this will cause a certain gap between the magnetic core and the plastic shell, causing the abnormal situation of the magnetic core shaking after assembly. At present, in order to bridge the core size deviation and core shaking, the magnetic core is usually fixed by the glue dispensing process when the magnetic core and the plastic shell are assembled to prevent the magnetic core from shaking. However, this method is inconvenient to operate and is easily affected by human factors. For example, the operator forgets to dispense glue, or the dispensing process is unqualified, which will still cause the magnetic core to shake. Summary of the invention
[0004] The first purpose of the present invention is to provide a toroidal inductor that can effectively improve the heat dissipation effect without increasing product costs and wasting resources, so as to reduce the operating temperature rise of the magnetic core and be lower than the decay temperature, thereby avoiding the decay of magnetic properties.
[0005] The second object of the present invention is to provide a toroidal inductor which can effectively prevent the shaking of the magnetic core.
[0006] The technical solution of the present invention is: A toroidal inductor comprises a magnetic core and two mutually connected upper and lower shells, wherein the upper and lower shells are both provided with an annular cavity, and the annular cavities in the upper and lower shells together constitute a magnetic core accommodating cavity, and at least one of the upper and lower end surfaces of the magnetic core accommodating cavity is provided with a plurality of supporting bosses; the magnetic core is arranged in the magnetic core accommodating cavity, the magnetic core abuts against the supporting bosses, and the magnetic core is confined between the upper and lower end surfaces of the magnetic core accommodating cavity, and an annular airway is formed between the magnetic core and the end surface of the magnetic core accommodating cavity where the supporting bosses are located, and a vent is also provided on the end surface of the magnetic core accommodating cavity where the supporting bosses are located. In this way, on the one hand, the end surface of the magnetic core can be abutted against the supporting bosses, so that most of the end surface of the magnetic core is in a suspended state, effectively increasing the heat dissipation area of the end surface of the magnetic core; on the other hand, heat can be circulated with air outside the shell through the annular airway and the vent to form heat convection, thereby further improving the heat dissipation effect, so that there is no need to increase the cross-sectional area of the conductor production, and the heat dissipation effect can be effectively improved without increasing the product cost and wasting resources, so as to reduce the working temperature rise of the magnetic core and lower it below the decay temperature, thereby avoiding the decay of magnetic properties.
[0007] Preferably, a plurality of supporting bosses are provided on both the upper and lower end surfaces of the magnetic core accommodating cavity, and at least one of the inner and outer side walls of the annular cavity has a gap with the magnetic core, the gap constitutes a side wall airway, and the side wall airway is connected to the annular airways located at both ends of the magnetic core. In this way, on the one hand, both end surfaces of the magnetic core can be abutted against the supporting bosses, so that most of the end surfaces of the magnetic core are in a suspended state, and at least one side of the inner and outer side surfaces of the magnetic core is in a suspended state, thereby greatly increasing the heat dissipation area of the end surfaces of the magnetic core; more importantly, the annular airways at both ends of the magnetic core can be connected through the side wall airway, so that the heat can be circulated with the air outside the shell through the annular airways, side wall airways and air vents at both ends, forming heat convection, thereby further improving the heat dissipation effect.
[0008] Preferably, the outer wall of the annular cavity is provided with a plurality of supporting convex strips distributed in sequence in the circumferential direction, the supporting convex strips extend along the axial direction of the magnetic core, and the outer wall of the magnetic core is close to or abuts against the supporting convex strips, so that the side wall air channel is formed between the outer wall of the annular cavity and the magnetic core. In this way, on the one hand, a side wall air channel can be formed between the outer wall of the annular cavity and the outer wall of the magnetic core to improve the heat dissipation effect; on the other hand, the structural strength and stability of the upper and lower shells can be effectively guaranteed by the supporting convex strips, so as to avoid the problem of deformation of the upper and lower shells during the process of winding the coil on the upper and lower shells.
[0009] Preferably, compressed air is connected to the vent hole to achieve forced air cooling of the magnetic core. In this way, an active air flow can be formed in the annular airway, or in the annular airway and the side wall airway, and the temperature of the magnetic core can be effectively reduced through air circulation, thereby further improving the heat dissipation effect.
[0010] Preferably, the inner wall of the annular cavity is provided with a plurality of ribs distributed in sequence in the circumferential direction, the ribs extending along the axial direction of the magnetic core, and the inner side wall of the magnetic core is pressed tightly against the ribs to fix the magnetic core in the magnetic core accommodating cavity. In this way, during the installation of the magnetic core, by applying pressure to the magnetic core, the side wall of the inner hole of the magnetic core presses against the ribs, causing the ribs to deform, thereby effectively preventing the magnetic core from shaking, especially preventing the magnetic core from shaking in the radial direction.
[0011] Preferably, an elastic member is further included, which is arranged between the magnetic core and one end of the magnetic core accommodating cavity, and the gap between the magnetic core and the two ends of the magnetic core accommodating cavity is eliminated by elastic deformation of the elastic member, so that the magnetic core can be effectively prevented from shaking in the axial direction.
[0012] Preferably, it also includes a base and a central baffle, and both the upper and lower shells include an inner annular shell wall and an outer annular shell wall. The space between the inner annular shell wall and the outer annular shell wall constitutes the annular cavity, and the space surrounded by the inner annular shell wall constitutes the winding cavity. A fixed pressure hook is provided at one end of the central baffle, and a buckle is provided at the other end of the central baffle. The central baffle passes through the winding cavity, and the upper and lower shells are located between the fixed pressure hook and the base, and the buckle is connected to the base by clamping, so that the upper and lower shells are pressed tightly between the fixed pressure hook and the base. In this way, the upper and lower shells can be connected to each other and fixed on the base by the buckle of the central baffle and the base.
[0013] Preferably, a plurality of partitions are arranged on the central baffle, which are sequentially distributed in the circumferential direction, and the partitions extend along the axial direction of the magnetic core and divide the winding cavity into a plurality of winding vias. In this way, each coil can be separated by the partitions to avoid short circuits between coils.
[0014] Preferably, a plurality of one-to-one corresponding barrier ribs are provided on the outer surfaces of the upper and lower shells, and the barrier ribs include inner ribs provided on the inner side surface of the winding cavity, outer ribs provided on the outer side surface of the outer annular shell wall, and end surface connecting ribs connecting the inner ribs and the outer ribs, the inner ribs and the outer ribs extend along the axial direction of the magnetic core, and the inner ribs are provided with limiting grooves that cooperate with the partitions, and the partitions extend into the corresponding limiting grooves. In this way, on the one hand, the barrier ribs can be used to separate the coils by cooperating with the partitions to further avoid short circuits between the coils; on the other hand, the relative positions of the upper and lower shells and the center barrier can be determined by cooperating with the partitions and the limiting grooves to avoid relative rotation between the shells and the center barrier, which may cause friction between the center barrier and the coils.
[0015] Preferably, the base is provided with a plurality of mounting holes and a plurality of terminal holes, and the terminal holes are provided with wiring terminals. The mounting holes are used to mount the base, so that the inductor can be independently mounted on the client chassis or body without relying on the PCB board; the terminal holes are used to mount the wiring terminals, and the coil can be connected to the wiring terminals.
[0016] The beneficial effects of the present invention are: First, it can effectively improve the heat dissipation effect without increasing product costs and wasting resources, so as to reduce the operating temperature rise of the core and lower it below the decay temperature, thereby avoiding the decay of magnetic properties.
[0017] Secondly, it can effectively prevent the core from shaking, including radial shaking and axial shaking. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is an exploded diagram of the toroidal inductor of the present invention.
[0019] Figure 2 It is an assembly diagram of the toroidal inductor of the present invention.
[0020] Figure 3 It is a bottom view of the upper case of the toroidal inductor of the present invention.
[0021] Figure 4 It is a schematic diagram of a cross-sectional structure of the upper shell of the toroidal inductor of the present invention.
[0022] Figure 5 It is a three-dimensional structural schematic diagram of the upper shell of the toroidal inductor of the present invention.
[0023] Figure 6 It is a structural schematic diagram of the connection terminal of the toroidal inductor of the present invention.
[0024] In the figure: Upper shell 1a, lower shell 1b, Annular cavity 1.1, magnetic core accommodating cavity 1.2, barrier rib 1.3, inner rib 1.31, outer rib 1.32, end surface connecting rib 1.33, inner annular shell wall 1.4, outer annular shell wall 1.5, rib 1.6, supporting boss 1.7; Magnetic core 2; Annular rubber pad 3; Central baffle 4, fixed pressure hook 4.1, buckle 4.2, partition 4.3; Base 5, clamping hole 5.1, wiring terminal 5.2, undercut 5.21, wiring hole 5.22, mounting hole 5.3; Winding cavity 6, winding via 6.1; Ventilation hole 7; Annular airway 8; Side wall airway 9. DETAILED DESCRIPTION
[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Specific embodiment 1, as Figure 1-Figure 4As shown, a toroidal inductor includes a magnetic core 2 and upper and lower shells 1a and 1b (i.e., an upper shell 1a and a lower shell 1b) connected to each other. The magnetic core 2 is a toroidal magnetic core 2. The upper and lower shells connected to each other can be connected by snap-on 4.2 connection, threaded connection, bolt connection, welding, bonding, etc. Of course, the upper and lower shells can also be connected to each other by other connection methods. In this embodiment, the upper and lower shells are both plastic shells.
[0026] An annular cavity 1.1 is provided in both the upper and lower shells. The annular cavities 1.1 in the upper and lower shells together constitute a magnetic core accommodating cavity 1.2. A plurality of supporting bosses 1.7 are provided on at least one of the upper and lower end surfaces of the magnetic core accommodating cavity 1.2. The magnetic core 2 is arranged in the magnetic core accommodating cavity 1.2. The magnetic core 2 abuts against the supporting bosses 1.7, and the magnetic core 2 is confined between the upper and lower end surfaces of the magnetic core accommodating cavity 1.2, and an annular airway 8 is formed between the magnetic core 2 and the end surface of the magnetic core accommodating cavity 1.2 where the supporting bosses 1.7 are located, and an air vent 7 is also provided on the end surface of the magnetic core accommodating cavity 1.2 where the supporting bosses 1.7 are located, and the air vent 7 connects the annular airway 8 with the air outside the shell.
[0027] In one embodiment, a plurality of support bosses 1.7 are provided on both upper and lower end surfaces of the magnetic core accommodating cavity 1.2. Both ends of the magnetic core 2 abut against the support bosses 1.7 on the upper and lower end surfaces of the magnetic core accommodating cavity 1.2. In this embodiment, an annular airway 8 is formed at each end of the magnetic core 2. Ventilation holes 7 are provided on both upper and lower end surfaces of the magnetic core accommodating cavity 1.2.
[0028] In another embodiment, a plurality of support bosses 1.7 are provided on the upper end surface or the lower end surface of the magnetic core accommodating cavity 1.2. One end of the magnetic core 2 abuts against the support boss 1.7 on one end of the magnetic core accommodating cavity 1.2, and the other end of the magnetic core 2 abuts against the other end surface of the magnetic core accommodating cavity 1.2. In this embodiment, only one annular air channel 8 is formed at one end of the magnetic core 2.
[0029] The annular inductor of the present embodiment, on the one hand, can make the end face of the magnetic core 2 abut against the supporting boss 1.7, so that most of the end face of the magnetic core 2 is in a suspended state, effectively increasing the heat dissipation area of the end face of the magnetic core 2; on the other hand, the heat can be circulated with the air outside the shell through the annular airway 8 and the air vent 7 to form heat convection, thereby further improving the heat dissipation effect. Therefore, there is no need to increase the cross-sectional area of the conductor production. The heat dissipation effect can be effectively improved without increasing the product cost and wasting resources, so as to reduce the working temperature rise of the magnetic core 2 and lower it below the decay temperature, thereby avoiding the decay of magnetic properties.
[0030] Specifically, Figure 1-Figure 4As shown, the upper and lower shells 1a, 1b both include an inner annular shell wall 1.4 and an outer annular shell wall 1.5. The upper shell also includes a top wall connecting the inner annular shell wall 1.4 and the outer annular shell wall 1.5, and the lower shell also includes a bottom wall connecting the inner annular shell wall 1.4 and the outer annular shell wall 1.5. The space between the inner annular shell wall 1.4 and the outer annular shell wall 1.5 constitutes the annular cavity 1.1. The space enclosed by the inner annular shell wall 1.4 constitutes the winding cavity 6. The coil of the annular inductor passes through the winding cavity 6 and surrounds the outer sides of the upper and lower shells.
[0031] The support bosses 1.7 on the same end surface of the magnetic core accommodating cavity 1.2 are divided into several groups, and each group of support bosses 1.7 is evenly distributed around the circumference of the magnetic core 2. Each group of support bosses 1.7 includes two support bosses 1.7, which are distributed along the radial direction of the magnetic core 2, and there is a gap between the two support bosses 1.7 for airflow.
[0032] Furthermore, compressed air is connected to the vent hole 7 to achieve forced air cooling of the magnetic core 2. In this way, an active air flow can be formed in the annular airway 8, and the temperature of the magnetic core 2 can be effectively reduced through air circulation, thereby further improving the heat dissipation effect. Of course, it should be noted that connecting compressed air to the vent hole 7 is a preferred solution, and compressed air may not be connected.
[0033] There are one or more vent holes 7 communicating with the same annular air channel 8 .
[0034] In one embodiment, there are multiple vents 7 connected to the same annular air channel 8 , and compressed air is connected to one of the vents 7 , thereby forming an air flow in the annular air channel 8 to achieve forced air cooling of the magnetic core 2 .
[0035] Specific embodiment 2, as Figure 1-Figure 4 As shown, a toroidal inductor includes a magnetic core 2 and upper and lower shells 1a and 1b (i.e., an upper shell 1a and a lower shell 1b) connected to each other. The upper and lower shells connected to each other can be connected by snap-on 4.2 connection, threaded connection, bolt connection, welding, bonding, etc. Of course, the upper and lower shells can also be connected to each other by other connection methods. In this embodiment, both the upper and lower shells are plastic shells.
[0036] An annular cavity 1.1 is provided in both the upper and lower shells. The annular cavities 1.1 in the upper and lower shells together constitute a magnetic core accommodating cavity 1.2. A plurality of supporting bosses 1.7 are provided on at least one of the upper and lower end surfaces of the magnetic core accommodating cavity 1.2. The magnetic core 2 is arranged in the magnetic core accommodating cavity 1.2. The magnetic core 2 abuts against the supporting bosses 1.7, and the magnetic core 2 is confined between the upper and lower end surfaces of the magnetic core accommodating cavity 1.2. An annular airway 8 is formed between the magnetic core 2 and the end surface of the magnetic core accommodating cavity 1.2 where the supporting bosses 1.7 are located, and an air vent 7 is also provided on the end surface of the magnetic core accommodating cavity 1.2 where the supporting bosses 1.7 are located. The air vent 7 connects the annular airway 8 with the air outside the shell.
[0037] In this embodiment, a plurality of support bosses 1.7 are provided on both upper and lower end surfaces of the magnetic core accommodating cavity 1.2. The two ends of the magnetic core 2 are respectively in contact with the support bosses 1.7 on the upper and lower end surfaces of the magnetic core accommodating cavity 1.2. In this embodiment, an annular airway 8 is formed at each end of the magnetic core 2. Ventilation holes 7 are provided on both upper and lower end surfaces of the magnetic core accommodating cavity 1.2.
[0038] There is a gap between at least one of the inner and outer walls of the annular cavity 1.1 and the magnetic core 2, and the gap constitutes a side wall air channel 9, and the side wall air channel 9 is connected to the annular air channels 8 located at both ends of the magnetic core 2.
[0039] In one embodiment, there is a gap between the outer side wall of the annular cavity 1.1 and the magnetic core 2, and the gap constitutes a side wall air channel 9, and the side wall air channel 9 is connected to the annular air channels 8 located at both ends of the magnetic core 2.
[0040] In another embodiment, there is a gap between the inner wall of the annular cavity 1.1 and the magnetic core 2, and the gap constitutes a side wall air channel, and the side wall air channel is connected to the annular air channels 8 located at both ends of the magnetic core 2.
[0041] In the third embodiment, there are gaps between the inner and outer side walls of the annular cavity 1.1 and the magnetic core 2, and the gaps constitute side wall air channels, and the side wall air channels are connected to the annular air channels 8 located at the two ends of the magnetic core 2.
[0042] The annular inductor of this embodiment can, on the one hand, make both end surfaces of the magnetic core 2 abut against the supporting boss 1.7, so that most of the end surfaces of the magnetic core 2 are in a suspended state, and at least one of the inner and outer side surfaces of the magnetic core 2 is in a suspended state, thereby greatly increasing the heat dissipation area of the end surfaces of the magnetic core 2; more importantly, the annular airways 8 at both ends of the magnetic core 2 can be connected through the side wall airways 9, so that heat can be circulated with the air outside the shell through the annular airways 8, the side wall airways 9 and the air holes 7 at both ends of the magnetic core accommodating cavity 1.2, forming heat convection, thereby further improving the heat dissipation effect; therefore, there is no need to increase the cross-sectional area of the conductor production, and the heat dissipation effect can be effectively improved without increasing the product cost and wasting resources, so as to reduce the working temperature rise of the magnetic core 2 and lower it below the decay temperature, thereby avoiding the decay of magnetic properties.
[0043] Specifically, Figure 1-Figure 4 As shown, both the upper and lower shells include an inner annular shell wall 1.4 and an outer annular shell wall 1.5. The upper shell also includes a top wall connecting the inner annular shell wall 1.4 and the outer annular shell wall 1.5, and the lower shell also includes a bottom wall connecting the inner annular shell wall 1.4 and the outer annular shell wall 1.5. The space between the inner annular shell wall 1.4 and the outer annular shell wall 1.5 constitutes the annular cavity 1.1. The space enclosed by the inner annular shell wall 1.4 constitutes the winding cavity 6. The coil of the annular inductor passes through the winding cavity 6 and surrounds the outer sides of the upper and lower shells.
[0044] The support bosses 1.7 on the same end surface of the magnetic core accommodating cavity 1.2 are divided into several groups, and each group of support bosses 1.7 is evenly distributed around the circumference of the magnetic core 2. Each group of support bosses 1.7 includes two support bosses 1.7, which are distributed along the radial direction of the magnetic core 2, and there is a gap between the two support bosses 1.7 for airflow.
[0045] Furthermore, compressed air is connected to the vent hole 7 to achieve forced air cooling of the magnetic core 2. In this way, active air flow can be formed in the annular air channel 8 and the side wall air channel 9 at both ends of the magnetic core accommodating cavity 1.2, and the temperature of the magnetic core 2 is effectively reduced through air circulation, thereby further improving the heat dissipation effect. Of course, it should be noted that connecting compressed air to the vent hole 7 is a preferred solution, and compressed air may not be connected.
[0046] There are one or more vent holes 7 communicating with the same annular air channel 8 .
[0047] In one embodiment, there is one vent hole 7 connected to one of the annular air channels 8, and compressed air is connected to the vent hole 7; there are one or more vent holes 7 connected to the other annular air channel 8; thereby, active air flow is formed in the annular air channels 8 and the side wall air channels 9 at both ends of the core accommodating cavity 1.2, and the temperature of the magnetic core 2 is effectively reduced through air circulation.
[0048] Further, such as Figure 1-Figure 5 As shown, the outer wall of the annular cavity 1.1 is provided with a plurality of circumferentially evenly distributed supporting ridges (not shown in the figure), the supporting ridges extend along the axial direction of the magnetic core 2, and the outer wall of the magnetic core 2 is close to or abuts against the supporting ridges, so that the side wall air channel 9 is formed between the outer wall of the annular cavity 1.1 and the magnetic core 2. In this way, on the one hand, the side wall air channel 9 can be formed between the outer wall of the annular cavity 1.1 and the outer wall of the magnetic core 2 to improve the heat dissipation effect; on the other hand, the structural strength and stability of the upper and lower shells can be effectively guaranteed by the supporting ridges, so as to avoid the problem of deformation of the upper and lower shells during the process of winding the coil on the upper and lower shells.
[0049] Specific embodiment 3: The rest of the structure of this embodiment refers to specific embodiment 1 or specific embodiment 2, and the difference is that: like Figure 3-Figure 5 As shown, a plurality of ribs 1.6 uniformly distributed in the circumferential direction are provided on the inner wall of the annular cavity 1.1. The ribs 1.6 extend axially along the magnetic core 2. The inner side wall of the magnetic core 2 is pressed tightly against each rib 1.6 to fix the magnetic core 2 in the magnetic core accommodating cavity 1.2. The ribs 1.6 are made of plastic and are integrally formed with the shell. In this way, during the installation of the magnetic core 2, by applying pressure to the magnetic core 2, the side wall of the inner hole of the magnetic core 2 presses against the ribs 1.6, causing the ribs 1.6 to deform, thereby effectively preventing the magnetic core 2 from shaking, especially preventing the magnetic core 2 from shaking in the radial direction.
[0050] In one embodiment, if Figure 3-Figure 5 As shown, the inner wall of the annular cavity 1.1 in the upper shell is provided with a plurality of ribs 1.6 evenly distributed in the circumference, and the protrusion height of the ribs 1.6 gradually increases from bottom to top. The inner wall of the annular cavity 1.1 in the lower shell is also provided with a plurality of ribs 1.6 evenly distributed in the circumference, and the protrusion height of the ribs 1.6 gradually increases from top to bottom. Since the protrusion height of the ribs 1.6 in the upper shell gradually increases from bottom to top, and the protrusion height of the ribs 1.6 in the lower shell gradually increases from top to bottom, it is convenient for the magnetic core 2 to be sleeved in the annular cavity 1.1. On the other hand, after the magnetic core 2 is installed, the ribs 1.6 in the upper shell and the lower shell can be used to prevent the magnetic core 2 from shaking.
[0051] In another embodiment, a plurality of ribs 1.6 evenly distributed in the circumferential direction are provided on the inner wall of the annular cavity 1.1 in the upper shell, and the protruding height of the ribs 1.6 gradually increases from bottom to top. Since the protruding height of the ribs 1.6 in the upper shell gradually increases from bottom to top, it is convenient to sleeve the magnetic core 2 in the annular cavity 1.1. On the other hand, after the magnetic core 2 is installed, the ribs 1.6 in the upper shell can prevent the magnetic core 2 from shaking.
[0052] In the other three embodiments, a plurality of ribs 1.6 evenly distributed in the circumferential direction are provided on the inner wall of the annular cavity 1.1 in the lower shell, and the protruding height of the ribs 1.6 gradually increases from top to bottom. Since the protruding height of the ribs 1.6 in the lower shell gradually increases from top to bottom, it is convenient to sleeve the magnetic core 2 in the annular cavity 1.1. On the other hand, after the magnetic core 2 is installed, the ribs 1.6 in the lower shell can prevent the magnetic core 2 from shaking.
[0053] Further, such as Figure 1 As shown, the annular inductor also includes an elastic member. The elastic member is arranged between the magnetic core 2 and one end of the magnetic core accommodating cavity 1.2, and one end of the magnetic core 2 is pressed against the elastic member, and the gap between the magnetic core 2 and the two ends of the magnetic core accommodating cavity 1.2 is eliminated by elastic deformation of the elastic member. In this way, the magnetic core 2 can be effectively prevented from shaking in the axial direction.
[0054] In one embodiment, if Figure 1 As shown, the elastic member is an annular rubber pad 3. The outer diameter of the annular rubber pad 3 is smaller than the outer diameter of the annular cavity 1.1 where the annular rubber pad 3 is located, and the inner diameter of the annular rubber pad 3 is smaller than the inner diameter of the annular cavity 1.1 where the annular rubber pad 3 is located.
[0055] In one example, a plurality of support bosses 1.7 are provided on both upper and lower end surfaces of the magnetic core accommodating cavity 1.2. One end of the magnetic core 2 abuts against the support boss 1.7 on one end of the magnetic core accommodating cavity 1.2, and the annular rubber pad 3 is located between the other end of the magnetic core 2 and the support boss 1.7 on the other end of the magnetic core accommodating cavity 1.2, and one end of the magnetic core 2 abuts against the annular rubber pad 3. The annular rubber pad 3 abuts against the support boss 1.7. The inner ring of the annular rubber pad 3 is provided with a plurality of convex heads evenly distributed in the circumferential direction, and each convex head abuts against the inner side surface of the annular cavity 1.1.
[0056] In another example, a plurality of supporting bosses 1.7 are provided on the upper end surface or the lower end surface of the magnetic core accommodating cavity 1.2. One end of the magnetic core 2 abuts against the supporting boss 1.7 on one end of the magnetic core accommodating cavity 1.2, and the annular rubber pad 3 is located between the other end of the magnetic core 2 and the other end of the magnetic core accommodating cavity 1.2, and one end of the magnetic core 2 abuts against the annular rubber pad 3. The inner ring of the annular rubber pad 3 is provided with a plurality of convex heads evenly distributed in the circumferential direction, and each convex head abuts against the inner side surface of the annular cavity 1.1.
[0057] In another embodiment, the elastic member is a spring or a spring (not shown in the figure).
[0058] Specific embodiment 4: The rest of the structure of this embodiment refers to specific embodiment 1, specific embodiment 2 or specific embodiment 3, and the difference is that: like Figure 1-Figure 4As shown, the annular inductor also includes a base 5 and a central baffle 4. A fixed pressure hook 4.1 is provided at one end of the central baffle 4. In the present embodiment, there are multiple fixed pressure hooks 4.1, and the multiple fixed pressure hooks 4.1 are evenly distributed around the magnetic core 2. A buckle 4.2 is provided at the other end of the central baffle 4, and a clamping hole 5.1 is provided on the base 5. The central baffle 4 passes through the winding cavity 6. The upper and lower shells are located between the fixed pressure hook 4.1 and the base 5, and the buckle 4.2 is connected to the clamping hole 5.1 of the base 5 by clamping, so that the upper and lower shells are pressed tightly between the fixed pressure hook 4.1 and the base 5. In this way, the upper and lower shells can be connected to each other and fixed on the base 5 by clamping the buckle 4.2 of the central baffle to the base 5.
[0059] In this embodiment, the upper and lower shells are connected in such a way that the buckle 4.2 of the central partition is connected with the base 5 by snapping, and the upper and lower shells are pressed tightly between the fixed pressure hook 4.1 and the base 5.
[0060] Further, such as Figure 1 , Figure 2 As shown, the central baffle 4 is provided with a plurality of partitions 4.3 distributed in sequence in the circumferential direction, the partitions 4.3 are located in the winding cavity 6, and the partitions 4.3 extend axially along the magnetic core 2 and divide the winding cavity 6 into a plurality of winding vias 6.1. In this way, each coil can be separated by the partitions 4.3 to avoid short circuits between coils.
[0061] The number of the partitions 4.3 can be set as required, for example, the number of the partitions 4.3 is 3 to 6. The number of the partitions 4.3 shown in the figure is 3.
[0062] Further, such as Figure 1 , Figure 2 , Figure 4 As shown, a plurality of barrier ribs 1.3 are provided on the outer surfaces of the upper and lower shells. The barrier ribs 1.3 of the upper and lower shells correspond one to one. The barrier ribs 1.3 are U-shaped. The barrier ribs 1.3 include an inner rib 1.31 provided on the inner side surface of the winding cavity 6, an outer rib 1.32 provided on the outer side surface of the outer annular shell wall 1.5, and an end surface connecting rib 1.33 connecting the inner rib 1.31 and the outer rib 1.32. The inner rib 1.31 and the outer rib 1.32 both extend axially along the magnetic core 2, and the corresponding barrier ribs 1.3 in the upper and lower shells together form an annular barrier rib. The inner rib 1.31 is provided with a limiting groove that cooperates with the partition 4.3, and the partition 4.3 extends into the corresponding limiting groove. In this way, on the one hand, the coils can be separated by the barrier rib 1.3 in cooperation with the partition 4.3 to further avoid short circuits between the coils; on the other hand, the partition 4.3 can be used in cooperation with the limiting groove to determine the relative positions of the upper and lower shells and the center partition 4 to avoid relative rotation between the shells and the center partition 4, which may cause friction between the center partition 4 and the coils.
[0063] Further, such as Figure 1 , Figure 2 , Figure 4 As shown, each barrier rib 1.3 comprises two mutually parallel rib plates and a plurality of connecting plates connecting the two rib plates. The vent hole 7 is located between the two rib plates.
[0064] Further, such as Figure 1 , Figure 2 , Figure 6 As shown, the base 5 is provided with a plurality of mounting holes 5.3 and a plurality of terminal holes, and the terminal holes are provided with connection terminals 5.2. Among them, the mounting holes 5.3 are used to mount the base 5, so that the inductor can be independently mounted on the client chassis or body without relying on the PCB board; the terminal holes are used to mount the connection terminals 5.2, and the coil can be connected to the connection terminals 5.2.
[0065] Specifically, the connection terminal 5.2 is provided with an undercut 5.21, and the connection terminal 5.2 cooperates with the terminal hole through the undercut 5.21 to prevent the connection terminal 5.2 from being loosened.
[0066] The wiring terminal 5.2 is provided with a wiring hole 5.22, and the coil of the ring inductor passes through the wiring hole 5.22 and is welded to the wiring terminal 5.2. In actual production, the coil can first pass through the wiring hole 5.22 and be welded to the wiring terminal 5.2, and then the wiring terminal 5.2 is plugged into the terminal hole; or the wiring terminal 5.2 can be first plugged into the terminal hole, and then the coil is passed through the wiring hole 5.22 and is welded to the wiring terminal 5.2.
[0067] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A toroidal inductor, comprising a magnetic core and two interconnected upper and lower shells, characterized in that: The upper and lower shells are both provided with an annular cavity, and the annular cavities in the upper and lower shells together constitute a magnetic core accommodating cavity, and at least one of the upper and lower end surfaces of the magnetic core accommodating cavity is provided with a plurality of supporting bosses; The magnetic core is arranged in the magnetic core accommodating cavity, the magnetic core abuts against the supporting boss, and the magnetic core is confined between the upper and lower end surfaces of the magnetic core accommodating cavity, an annular airway is formed between the magnetic core and the end surface of the magnetic core accommodating cavity where the supporting boss is located, and a vent hole is also provided on the end surface of the magnetic core accommodating cavity where the supporting boss is located.
2. The toroidal inductor according to claim 1, characterized in that: A plurality of supporting bosses are provided on the upper and lower end surfaces of the magnetic core accommodating cavity. There is a gap between at least one side wall of the inner and outer side walls of the annular cavity and the magnetic core. The gap constitutes a side wall airway, and the side wall airway is connected to the annular airways located at both ends of the magnetic core.
3. The toroidal inductor according to claim 2, characterized in that: The outer wall of the annular cavity is provided with a plurality of circumferentially distributed supporting ridges, which extend axially along the magnetic core. The outer wall of the magnetic core is close to or abuts against the supporting ridges, so that the side wall airway is formed between the outer wall of the annular cavity and the magnetic core.
4. The toroidal inductor according to claim 1, 2 or 3, characterized in that: Compressed air is introduced into the vent hole to achieve forced air cooling of the magnetic core.
5. The toroidal inductor according to claim 1, 2 or 3, characterized in that: The inner wall of the annular cavity is provided with a plurality of ribs distributed in sequence in the circumferential direction, the ribs extending along the axial direction of the magnetic core, and the inner side wall of the magnetic core is tightly pressed against the ribs to fix the magnetic core in the magnetic core accommodating cavity.
6. The toroidal inductor according to claim 5, characterized in that: It also includes an elastic member, which is arranged between the magnetic core and one end of the magnetic core accommodating cavity, and the gap between the magnetic core and the two ends of the magnetic core accommodating cavity is eliminated by elastic deformation of the elastic member.
7. The toroidal inductor according to claim 1, 2 or 3, characterized in that: It also includes a base and a central partition. The upper and lower shells both include an inner annular shell wall and an outer annular shell wall. The space between the inner annular shell wall and the outer annular shell wall constitutes the annular cavity. The space surrounded by the inner annular shell wall constitutes the winding cavity. A fixed pressure hook is provided at one end of the central partition, and a buckle is provided at the other end of the central partition. The central partition passes through the winding cavity. The upper and lower shells are located between the fixed pressure hook and the base, and the buckle is connected to the base so that the upper and lower shells are pressed tightly between the fixed pressure hook and the base.
8. The toroidal inductor according to claim 7, characterized in that: The central baffle is provided with a plurality of partitions which are sequentially distributed in the circumferential direction. The partitions extend along the axial direction of the magnetic core and divide the winding cavity into a plurality of winding through holes.
9. The toroidal inductor according to claim 8, characterized in that: A number of corresponding barrier ribs are provided on the outer surfaces of the upper and lower shells, and the barrier ribs include inner ribs arranged on the inner side surface of the winding cavity, outer ribs arranged on the outer side surface of the outer annular shell wall, and end surface connecting ribs connecting the inner ribs and the outer ribs. The inner ribs and the outer ribs extend along the axial direction of the magnetic core, and the inner ribs are provided with limit grooves that cooperate with the partitions, and the partitions extend into the corresponding limit grooves.
10. The toroidal inductor according to claim 7, characterized in that: The base is provided with a plurality of mounting holes and a plurality of terminal holes, and the terminal holes are provided with connection terminals.