Magnetic ring insulation structure and high-power and high-output multi-winding annular inductor

Abstract

The invention discloses a magnetic ring insulation structure and a high-power high-output multi-winding annular inductor, and relates to the technical field of inductors, the magnetic ring insulation structure comprises an annular shell, the annular shell is provided with an annular mounting groove, an annular cover plate and at least three mounting seats, each mounting seat is provided with a mounting part, and the mounting parts of every two adjacent mounting seats are jointly connected with flexible nomex paper; in the plane direction parallel to the radial direction of the annular shell, the paper length L1 of the two connecting positions of the flexible nomex paper is larger than the linear distance L2 of the connecting positions of the two installing parts, the flexible nomex paper has the insulating property, and the flexible nomex paper can be bent through the bendable characteristic of the flexible nomex paper and the length of the flexible nomex paper. A winding space formed by the flexible nomex paper and the corresponding winding section of the shell is variable; when corresponding to a coil winding with a large number of turns, the flexible nomex paper can be expanded by the coil winding, so that the paper length L1 of the flexible nomex paper can be used as much as possible, and the redundant winding space of the flexible nomex paper of the coil winding with a small number of turns can be utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of inductance, and in particular to a magnetic ring insulation structure and a multi-winding toroidal inductor with high power and high output. Background Art

[0002] The existing magnetic ring insulation setting in multi-winding toroidal inductors mainly adopts paint on the surface of the magnetic ring, or adds insulating tape to cover the surface of the magnetic ring to achieve a certain insulation effect. However, the insulation strength is far from enough for high power and high output. And the processing of adhesive tape is relatively difficult.

[0003] To this end, a design of adding an insulating partition in the magnetic ring has been proposed and continuously promoted. Many of its structures are as shown in the Chinese invention application with publication number CN116913646A, "A toroidal inductor with high high-frequency impedance characteristics", which includes a toroidal magnetic core, the outer surface of which is circumferentially equidistantly provided with a plurality of groups of coil windings, the inner wall of which is circumferentially equidistantly fixedly connected with a plurality of holders, the inner side of which is provided with a slot, an epoxy plate is inserted into the inside of the slot, the epoxy plate is used to separate the plurality of coil windings, the top of the toroidal magnetic core is circumferentially equidistantly fixedly connected with a plurality of locking components, the locking components are used to limit the position of the epoxy plate.

[0004] However, the epoxy plate is designed as an integrated structure. When the coil winding is set to 3, 4 or more groups, the integrated epoxy plate structure is correspondingly set to a three-diamond shape, a four-diamond shape (also called a cross shape) or other multi-diamond shapes of a larger number. Due to the high strength of the epoxy plate, when the integrated multi-diamond epoxy plate is installed on the magnetic ring, the actual winding thickness or width of each winding is very limited.

[0005] When a multi-winding toroidal inductor product is adjusted to have a different number of winding turns for each winding, it is easy for a certain winding (such as a winding with a small number of turns) to occupy a smaller space in the magnetic ring after winding, while a certain winding (such as a winding with a large number of turns) to occupy a larger space in the magnetic ring after winding. If the above-mentioned one-piece multi-diamond-shaped epoxy board with high hardness continues to be used, it is easy for the space reserved for the winding with a small number of turns to be large enough, while the space reserved for the winding with a large number of turns is usually insufficient. In some cases, the wire of the winding with a large number of turns may be squeezed against the epoxy board. When such squeezing is severe, conversely, it may cause the connection and fixing structure of the epoxy board to be squeezed and loosened, and the outer insulation layer or outer insulation skin of the winding wire may be damaged and cracked. Summary of the invention

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a solution that can solve the above-mentioned technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a magnetic ring insulation structure, comprising an annular shell, an annular mounting groove for inserting the magnetic ring is formed on one axial end face of the annular shell, an annular cover plate corresponding to the notch of the annular mounting groove is arranged on the annular shell, at least three mounting seats are arranged on the annular shell along the annular direction of the annular shell, and the annular shell is spaced apart by the adjacent mounting seats in the annular direction of the annular shell to form a shell winding segment; the mounting seat has a mounting portion corresponding to the inner ring channel of the annular shell, and the mounting portions of each two adjacent mounting seats are commonly connected with flexible nomex paper; wherein, in the plane direction parallel to the radial direction of the annular shell, the paper length L1 of the flexible nomex paper from the position where the flexible nomex paper is connected with the mounting portion of the first mounting seat to the position where the flexible nomex paper is connected with the mounting portion of the adjacent mounting seat satisfies that the paper length L1 is greater than the straight-line distance L2 from the connection position of the mounting portion of the first mounting seat to the connection position of the mounting portion of the adjacent second mounting seat.

[0008] As a further solution of the present invention: the mounting seat has an axial connecting portion close to the outer annular side surface of the annular shell, and a first radial connecting portion and a second radial connecting portion respectively close to the two axial end surfaces of the annular shell; the first radial connecting portion and the second radial connecting portion both extend radially along the annular shell to form a mounting portion, and the mounting portion extends to exceed the inner annular side surface of the annular shell and corresponds to the inner ring channel of the annular shell.

[0009] As a further solution of the present invention: a guide groove arranged radially along the annular shell is provided on the axial connecting portion and / or the second radial connecting portion; a guide block corresponding to the guide groove is formed on the outer annular side surface of the annular shell and / or the axial end surface of the annular shell.

[0010] As a further solution of the present invention: an installation groove is penetrated on the installation part along the axial direction of the annular shell, and the installation groove is also formed with an installation groove opening away from the axial connection part along the radial direction of the annular shell; a connecting piece matching with the installation part is correspondingly arranged on the installation seat, and the length direction of the connecting piece is the same as the axial direction of the annular shell, and the connecting piece is configured to be able to slide on the installation groove along the axial direction of the annular shell, and the length of the connecting piece satisfies that the connecting piece can be simultaneously located on the installation groove of the first radial connection part and on the installation groove of the second radial connection part; the connecting piece has a first side plate and a second side plate which match the two inner side walls of the installation groove one by one, and a connecting plate for connecting the first side plate and the second side plate, and when the connecting piece slides on the installation groove, the first side plate, the second side plate, the connecting plate and the radial inner bottom wall of the installation groove jointly enclose a paper edge accommodating space; a penetration hole corresponding to the connecting plate is penetrated on the flexible nomex paper, wherein the penetration hole also satisfies that the first side plate can be passed through.

[0011] As a further solution of the present invention: the two inner side walls adjacent to the installation groove are formed with a card slot, and the card slot passes through the installation part along the axial direction of the annular shell; the first side plate and the second side plate are formed with a card block that cooperates with the card slot on the corresponding installation groove.

[0012] As a further solution of the present invention: a plurality of air-avoiding grooves are formed at intervals on the side surfaces of the block on the first side panel, and the plurality of air-avoiding grooves are arranged at intervals along the axial direction of the annular shell; the air-avoiding grooves extend to the first side panel and the connecting plate in a planar direction parallel to the radial direction of the annular shell; wherein the air-avoiding grooves completely penetrate the block on the first side panel, the first side panel and the connecting plate in the planar direction to form a connecting channel from the block on the first side panel to the connecting plate, and the connecting channel simultaneously forms an inner ring channel connecting the paper edge accommodating space and the annular shell.

[0013] As a further solution of the present invention: when the penetration holes are prepared in the flexible Nomex paper, the connecting edge paper corresponding to the connecting channel is retained.

[0014] As a further solution of the present invention: after the clamping block and the clamping slot slide into place, the connecting piece is fixed to the mounting portion by means of glue dispensing.

[0015] The present invention also provides the following technical solution: a high-power and high-output multi-winding toroidal inductor, characterized in that it includes the above-mentioned magnetic ring insulation structure, the shell winding segment of the magnetic ring insulation structure is wound with a coil winding, and a magnetic ring is installed in the annular installation groove.

[0016] As a further solution of the present invention: it also includes a base for fixing the wire ends of the coil winding, and the base is connected to the annular shell by glue dispensing.

[0017] Compared with the prior art, the beneficial effects of the technical solution are as follows: the flexible nomex paper has insulating properties, and the flexible nomex paper is used for isolation insulation. When the annular shell is used to wind multiple groups of coil windings with different numbers of turns, the winding space formed by the flexible nomex paper and the corresponding shell winding segment is variable due to the bendable characteristics of the flexible nomex paper and the length setting of the flexible nomex paper; when corresponding to the coil winding with a large number of turns, the flexible nomex paper can be stretched out by the coil winding to apply the paper length L1 of the flexible nomex paper as much as possible, so as to utilize the redundant winding space of the flexible nomex paper of the coil winding with a smaller number of turns, so that the winding space suitable for the coil winding with a larger number of turns can be in a larger space.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural stereogram of the present invention; Figure 2 It is a structural front view of the present invention; Figure 3 yes Figure 2 A magnified view of the local structure at center A; Figure 4 It is a schematic diagram of the connection structure between the connecting member and the flexible nomex paper in the present invention; Figure 5 It is a structural schematic diagram of the connecting piece in the present invention.

[0021] The corresponding reference numerals in the accompanying drawings are described as follows: Annular housing-1, inner ring line side-101, outer ring line side-102, first axial end face 103, second axial end face-104, annular mounting groove-105, annular cover plate-106, housing winding section-107, Mounting seat-2, mounting portion-201, axial connection portion-202, first radial connection portion-203, second radial connection portion-204, Mounting groove-2011, mounting notch-2012, first inner side wall-2013, second inner side wall-2014, radial inner bottom wall-2015, card slot-2016, Flexible nomex paper-3, penetration hole-301, edge paper-302, Connecting member 4, first side plate 401, second side plate 402, connecting plate 403, card block 404, paper edge accommodating space 405, connecting channel 406. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5In this embodiment, a magnetic ring insulation structure includes an annular shell 1, the annular shell 1 has an inner annular side surface 101, an outer annular side surface 102, and a pair of axial end surfaces corresponding to the axial direction of the annular shell 1, the pair of axial end surfaces are respectively a first axial end surface 103 and a second axial end surface 104, and an annular mounting groove 105 for mounting the magnetic ring is formed on the first axial side surface 103.

[0024] The annular installation groove 105 is configured such that after the magnetic ring is installed in the annular installation groove 105 , the inner annular channel of the magnetic ring corresponds to the inner annular channel of the annular housing 1 .

[0025] An annular cover plate 106 corresponding to the notch of the annular mounting groove 105 is provided on the annular housing 1 .

[0026] At least three mounting seats 2 are arranged on the annular shell 1 at intervals along the annular direction of the annular shell 1. The adjacent mounting seats in the annular direction of the annular shell 1 allow the annular shell 1 to be spaced apart to form a shell winding segment 107, that is, multiple mounting seats separate the annular shell 1 into multiple shell winding segments in the annular direction of the annular shell 1.

[0027] The mounting seat 2 has a mounting portion 201 corresponding to the inner ring channel of the annular housing 1. The mounting portions of each two adjacent mounting seats are connected together with a flexible nomex paper 3, which is also called flexible glutinous rice paper and flexible Nomex paper. It is a synthetic aromatic amide polymer insulating paper. The calendered Nomex paper has good elasticity, tear resistance and abrasion resistance, and the thinner product has flexibility. Currently, the Nomex paper produced by DuPont is widely used in the market.

[0028] In the plane direction parallel to the radial direction of the annular shell 1, the paper length L1 of the flexible nomex paper 3 from the position where the flexible nomex paper 3 is connected to the mounting portion of the first mounting seat to the position where the flexible nomex paper 3 is connected to the mounting portion of the adjacent mounting seat satisfies that the paper length L1 is greater than the straight-line distance L2 from the connection position of the mounting portion of the first mounting seat to the connection position of the mounting portion of the adjacent second mounting seat.

[0029] The flexible Nomex paper 3 has insulation performance. Through the flexible Nomex paper 3 for insulation separation, when the annular housing 1 is used to wind multiple sets of coil windings with different numbers of turns, due to the bendable characteristics of the flexible Nomex paper 3 and the length setting of the flexible Nomex paper 3, the winding space formed by the flexible Nomex paper 3 and the corresponding housing winding segment 107 is variable; when corresponding to a coil winding with a larger number of turns, it can use the way of the coil winding to stretch the flexible Nomex paper to make the best use of the paper length L1 of the flexible Nomex paper 3, so as to utilize the redundant winding space of the flexible Nomex paper of the coil winding with a smaller number of turns, so that the winding space applicable to the coil winding with a larger number of turns can be in a larger space; it is not easy to occur that the wire of the winding with a large number of turns squeezes the paper or board for insulation and loosens the connection and fixing structure of the paper or board for insulation, and the outer insulation layer or outer insulation skin of the wire of the winding is damaged and cracked.

[0030] In this embodiment, the mounting seat 2 is arranged in a U shape, that is, the mounting seat 2 has an axial connection portion 202 close to the outer annular side surface 102 of the annular housing 1, the length direction of the axial connection portion 202 is parallel to the axis of the annular housing 1, the mounting seat 2 has a first radial connection portion 203 and a second radial connection portion 204 respectively close to the two axial end faces of the annular housing 1, and the length directions of the first radial connection portion 203 and the second radial connection portion 204 are both the same as the radius of the annular housing 1. The axial connection portion 202 is used to connect the first radial connection portion 203 and the second radial connection portion 204. One end of the first radial connection portion 203 far from the axial connection portion 202 and one end of the second radial connection portion 204 far from the axial connection portion 202 both extend along the radius of the annular housing 1 to form a mounting portion 201. Among them, the mounting portion 201 extends to exceed the inner annular side surface 101 of the annular housing 1 to correspond to the inner ring channel of the annular housing 1.

[0031] The mounting portion 201 is axially penetrated with a mounting groove 2011 along the annular housing 1, and the mounting groove 2011 also forms a mounting groove opening 2012 far from the axial connection portion 202 along the radius of the annular housing 1. The two inner side walls adjacent to the mounting groove opening 2012 on the mounting groove 2012 are respectively a first inner side wall 2013 and a second inner side wall 2014, and the inner side wall of the mounting groove 2011 opposite to the mounting groove opening 2012 is a radial inner bottom wall 2015.

[0032] The first inner side wall 2013 and the second inner side wall 2014 are both formed with a clamping groove 2016. The clamping groove 2016 axially penetrates the mounting portion 201 along the annular housing 1. The cross-sectional shape after the mounting groove 2011 is combined with the clamping groove 2016 is set in a convex shape or a T shape.

[0033] A connecting piece 4 is correspondingly arranged on the mounting seat 2 to cooperate with the mounting portion 201. The length direction of the connecting piece 4 is the same as the axial direction of the annular shell 1. The connecting piece 4 can slide on the mounting groove 2011 along the axial direction of the annular shell 1. The length of the connecting piece 4 is sufficient to allow the connecting piece 4 to be located on the mounting groove of the first radial connecting portion 203 and the mounting groove of the second radial connecting portion 204 at the same time.

[0034] The connecting member 4 has a first side plate 401 that cooperates with the first inner wall 2013 of the installation groove 2011, a second side plate 402 that cooperates with the second inner wall 2014 of the installation groove 2011, and a connecting plate 403 for connecting the first side plate 401 and the second side plate 402. The first side plate 401 and the second side plate 402 are both formed with a card block 404 that cooperates with the card slot on the corresponding installation groove.

[0035] When the connecting member 4 slides on the installation groove 2011 , the first side plate 401 , the second side plate 402 , the connecting plate 403 and the radial inner bottom wall 2015 of the installation groove 2011 are jointly enclosed to form a paper edge accommodating space 405 .

[0036] The flexible nomex paper 3 is provided with a penetration hole 301 corresponding to the connecting plate 403 , wherein the penetration hole 301 can simultaneously allow the first side plate 401 and the block 404 on the first side plate to pass through.

[0037] When installing the flexible Nomex paper, the block 404 on the first side plate and the first side plate 401 can be passed through the insertion holes in sequence, so that the connecting plate 403 is inserted into the insertion hole 301, and multiple pieces of flexible Nomex paper are connected to corresponding connecting pieces in sequence, each piece of flexible Nomex paper can be inserted and matched with two adjacent connecting pieces, and each connecting piece can be inserted and matched with two adjacent pieces of flexible Nomex paper.

[0038] After the penetration is completed, the connecting plate of the connecting piece is slid into the installation groove along the axial direction of the annular shell, and the clamping block on the first side plate and the clamping block on the second side plate are matched with the corresponding clamping grooves, and slide into the connecting piece and the installation part on the first radial connection part and the installation part on the second radial connection part.

[0039] The paper edge accommodating space is used to accommodate the paper edge of the flexible nomex paper (the portion from the insertion hole to the paper edge). The cooperation between the card block and the card slot is used to guide the sliding of the connecting plate on the one hand, and on the other hand, in the absence of other connecting and fastening structures, by combining the connection between the connecting plate and the insertion hole, when the coil winding with a large number of turns stretches the flexible nomex paper, it can prevent the flexible nomex paper from falling off, so that a relatively stable structure can be maintained in the next process.

[0040] In some embodiments, a plurality of air avoidance grooves are formed at intervals on the side surfaces of the block on the first side plate 401, and the plurality of air avoidance grooves are arranged at intervals along the axial direction of the annular shell 1, and the air avoidance grooves extend to the first side plate 401 and the connecting plate 403 in a planar direction parallel to the radial direction of the annular shell 1, wherein the air avoidance grooves completely penetrate the block on the first side plate, the first side plate 401, and the connecting plate 403 in the planar direction to form a connecting channel from the block on the first side plate to the connecting plate 403, wherein the connecting channel 406 simultaneously forms an inner ring channel connecting the paper edge accommodating space 405 and the annular shell 1.

[0041] When preparing the penetration hole 301, the flexible nomex paper 3 retains the connecting edge paper 302 corresponding to the connecting channel 406. By setting the connecting edge paper 302, the connection range of the paper edge of the flexible nomex paper 3 is greatly increased, and the paper edge is less likely to be cracked by the opening of the penetration hole 301 when subjected to force; by splitting the entire connecting plate into multiple connecting plates, the multiple connecting plates and the flexible nomex paper form a multi-position penetration, and the flexible nomex paper and the connecting member are less likely to separate during the pre-installation of the connecting member and the flexible nomex paper. In this case, when preparing the connecting member 4, especially when the connecting member 4 is prepared by injection molding, the material consumption of the workpiece can also be effectively reduced.

[0042] In some embodiments, the diameter of the penetration hole 301 is larger than the width of the corresponding portion of the connecting plate 403, so that the portion of the flexible nomex paper 3 having the penetration hole 301 can be moved and adjusted for a certain distance on the connecting plate 403, especially along the radial direction of the annular shell 1. This provides additional space for the expansion and squeezing of the flexible nomex paper 3, and has better applicability.

[0043] In some embodiments, the axial connection portion 202 and the second radial connection portion 204 are provided with guide grooves arranged along the radial direction of the annular housing 1, and guide blocks corresponding to the guide grooves are formed on the outer annular side surface 102 of the annular housing 1 and the second axial end surface 104 of the annular housing 1. Through the provision of the guide grooves and the guide blocks, on the one hand, the mounting seat 2 can be connected to the designated position on the annular housing 1 in a designated manner, and on the other hand, a device can be formed to limit the circumferential movement of the mounting seat 2 on the annular housing 1 to ensure the length of each housing winding segment 107.

[0044] In some embodiments, after the block 404 and the slot 2016 slide into place, the connector 4 can be fixed to the mounting portion 201 by dispensing glue.

[0045] See also Figure 1-5In this embodiment, a high-power and high-output multi-winding toroidal inductor includes a magnetic ring insulation structure of any of the above embodiments, a coil winding is wound on the shell winding segment 107 of the magnetic ring insulation structure, and a magnetic ring is installed in the annular installation groove 105.

[0046] In some embodiments, the multi-winding toroidal inductor further includes a base for fixing the wire ends of the coil windings, and the base can be connected to the annular housing by, for example, dispensing glue.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A magnetic ring insulation structure, comprising an annular housing, an annular mounting groove for receiving the magnetic ring is formed on one axial end surface of the annular housing, and an annular cover plate corresponding to the notch of the annular mounting groove is provided on the annular housing, characterized in that: At least three mounting seats are arranged at intervals along the annular direction of the annular shell, and the annular shell is spaced apart by the adjacent mounting seats in the annular direction of the annular shell to form a shell winding segment; The mounting seat has a mounting portion corresponding to the inner ring channel of the annular housing, and the mounting portions of each two adjacent mounting seats are commonly connected with a flexible nomex paper; Among them, in the plane direction parallel to the radial direction of the annular shell, the paper length L1 of the flexible nomex paper from the position where the flexible nomex paper is connected to the mounting part of the first mounting seat to the position where the flexible nomex paper is connected to the mounting part of the adjacent mounting seat satisfies that the paper length L1 is greater than the straight-line distance L2 from the connection position of the mounting part of the first mounting seat to the connection position of the mounting part of the adjacent second mounting seat.

2. The magnetic ring insulation structure according to claim 1, characterized in that: The mounting seat has an axial connection portion close to the outer annular side surface of the annular shell, and a first radial connection portion and a second radial connection portion respectively close to two axial end surfaces of the annular shell; The first radial connection portion and the second radial connection portion both extend in the radial direction of the annular shell to form a mounting portion, and the mounting portion extends beyond the inner annular side surface of the annular shell to correspond to the inner annular channel of the annular shell.

3. The magnetic ring insulation structure according to claim 2, characterized in that: The axial connection portion and / or the second radial connection portion are provided with a guide groove arranged along the radial direction of the annular housing; A guide block corresponding to the guide groove is formed on the outer annular side surface of the annular shell and / or the axial end surface of the annular shell.

4. The magnetic ring insulation structure according to claim 2 or 3, characterized in that: The mounting portion is provided with a mounting groove penetrating along the axial direction of the annular shell, and the mounting groove is further provided with a mounting notch away from the axial connecting portion along the radial direction of the annular shell; A connecting piece matching the mounting portion is correspondingly arranged on the mounting seat, the length direction of the connecting piece is the same as the axial direction of the annular housing, the connecting piece is configured to be able to slide on the mounting groove along the axial direction of the annular housing, and the length of the connecting piece is sufficient to allow the connecting piece to be located on the mounting groove of the first radial connecting portion and the mounting groove of the second radial connecting portion at the same time; The connecting member comprises a first side plate and a second side plate matched with two inner side walls of the mounting groove one by one, and a connecting plate for connecting the first side plate and the second side plate. When the connecting member slides on the mounting groove, the first side plate, the second side plate, the connecting plate and the radial inner bottom wall of the mounting groove jointly enclose a paper edge accommodating space; The flexible nomex paper is provided with penetration holes corresponding to the connecting plate, wherein the penetration holes can also be provided so that the first side plate can pass through.

5. The magnetic ring insulation structure according to claim 4, characterized in that: The two inner side walls of the installation groove adjacent to the installation groove opening are both formed with a clamping groove, and the clamping groove penetrates the installation portion along the axial direction of the annular shell; The first side plate and the second side plate are both formed with clamping blocks that match with the clamping grooves on the corresponding installation grooves.

6. The magnetic ring insulation structure according to claim 5, characterized in that: A plurality of air-avoiding grooves are formed at intervals on the side surface of the clamping block on the first side plate, and the plurality of air-avoiding grooves are arranged at intervals along the axial direction of the annular housing; The air avoidance groove extends to the first side plate and the connecting plate in a plane direction parallel to the radial direction of the annular housing; Among them, the air avoidance groove completely penetrates the block on the first side plate, the first side plate and the connecting plate in the plane direction to form a connecting channel from the block on the first side plate to the connecting plate, and the connecting channel simultaneously forms an inner ring channel connecting the paper edge accommodating space and the annular shell.

7. The magnetic ring insulation structure according to claim 6, characterized in that: When the penetration holes are prepared in the flexible Nomex paper, the connecting edge paper corresponding to the connecting channel is retained.

8. The magnetic ring insulation structure according to any one of claims 5 to 7, characterized in that: After the card block and the card slot slide into place, the connector is fixed to the mounting portion by means of glue dispensing.

9. A high-power, high-output multi-winding toroidal inductor, characterized in that: It comprises the magnetic ring insulation structure as described in any one of claims 1 to 8, wherein a coil winding is wound on a shell winding segment of the magnetic ring insulation structure, and a magnetic ring is installed in the annular installation groove.

10. The multi-winding toroidal inductor according to claim 9, characterized in that: It also includes a base for fixing the wire ends of the coil winding, and the base is connected to the annular shell by dispensing glue.

Images