Transformer and electrical equipment

Abstract

The invention discloses a transformer and electrical equipment, and belongs to the technical field of transformers, and the transformer comprises a magnetic core body which is provided with at least one through hole; the first winding and the second winding are respectively wound on the magnetic core body, and a lead of at least one of the first winding and the second winding penetrates through the magnetic core body through at least one through hole. According to the transformer provided by the embodiment of the invention, the lead wire of the at least one winding penetrates out of the through hole of the magnetic core body, so that the lead wire penetrating out and the magnetic core body jointly form a wire outlet inductor integrated in the transformer. According to the structure, an independent inductance magnetic core does not need to be additionally arranged, leakage inductance does not need to be adjusted by greatly changing the distance between transformer windings, and therefore inductance function integration is achieved, and the size and weight of an overall magnetic part are reduced.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more particularly to a transformer and electrical equipment. Background Technology

[0002] Transformers are core magnetic components in power electronic devices, used to achieve voltage transformation, electrical isolation, and energy transfer. In applications such as resonant converters, not only transformers are needed, but also additional inductors to form a complete functional circuit.

[0003] In current resonant circuits, transformers and inductors are mostly independent magnetic components. As a result, the amount of magnetic cores and windings used in these components is excessive, leading to a large size and weight of the transformer. Summary of the Invention

[0004] This application provides a transformer and electrical equipment to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a transformer is provided, comprising: The magnetic core body has at least one through hole; The first winding and the second winding are respectively wound on the magnetic core body. The lead of at least one of the first winding and the second winding passes through the magnetic core body through at least one of the through holes.

[0006] In conjunction with the first aspect, in the first winding and the second winding, at least one of the leads includes a first incoming line and a first outgoing line; and the first incoming line and the first outgoing line of at least one of them are passed through different through holes, wherein the through hole through which the first incoming line passes is a first through hole, and the through hole through which the first outgoing line passes is a second through hole.

[0007] In conjunction with the first aspect, the first through hole and the second through hole are located on the same yoke of the magnetic core body, or on the same column of the magnetic core body.

[0008] In conjunction with the first aspect, there is a gap between the first through hole and the second through hole, the size of which is configured to adjust the inductance value and / or leakage inductance value.

[0009] In conjunction with the first aspect, a slot is provided between the first through hole and the second through hole, and the slot is disposed on the magnetic core body.

[0010] In conjunction with the first aspect, one end of the slot is connected to the first through hole, and the other end of the slot is connected to the second through hole.

[0011] In conjunction with the first aspect, a magnetic block is provided between the first through hole and the second through hole, and the magnetic block is attached to the magnetic core body.

[0012] In conjunction with the first aspect, at least one of the first winding and the second winding includes a first sub-winding and a second sub-winding arranged in parallel, the leads of the first sub-winding include a second incoming line and a second outgoing line, and the leads of the second sub-winding include a third incoming line and a third outgoing line. The second incoming line and the third incoming line pass through the same through hole and are wound around the magnetic core body at least once on the portion located on one side of the through hole in opposite directions, the through hole being the third through hole; and / or, the second outgoing line and the third outgoing line pass through the same through hole and are wound around the magnetic core body at least once on the portion located on one side of the through hole in opposite directions, the through hole being the fourth through hole.

[0013] In conjunction with the first aspect, at least one of the first winding and the second winding includes a first sub-winding and a second sub-winding arranged in series, the leads of the first sub-winding include a second incoming line and a second outgoing line, and the leads of the second sub-winding include a third incoming line and a third outgoing line. The second outgoing line and the third incoming line are connected in series; both the second incoming line and the third incoming line pass through a through hole, which is the fifth through hole; both the second outgoing line and the third outgoing line pass through another through hole, which is the sixth through hole.

[0014] In conjunction with the first aspect, one of the first winding and the second winding includes the first sub-winding and the second sub-winding, and the lead wire of the other includes the first incoming wire and the first outgoing wire, which are inserted into different through holes.

[0015] In conjunction with the first aspect, in the first sub-winding and the second sub-winding, one is fitted around the outer periphery of the other.

[0016] In conjunction with the first aspect, the transformer further includes an insulating bushing disposed in the through hole and surrounding the lead wire passing through the through hole.

[0017] In conjunction with the first aspect, the insulating sleeve is provided with a reverse wrapping structure, which is disposed on the outer surface of the magnetic core body and surrounds the through hole.

[0018] In a second aspect, an electrical device is provided, comprising a transformer as described in any one of the first aspects.

[0019] One of the above technical solutions has the following advantages or beneficial effects: This application provides a transformer, including: a magnetic core body with at least one through hole; a first winding and a second winding respectively wound on the magnetic core body; and at least one of the first winding and the second winding having its lead pass through the magnetic core body through the at least one through hole. The transformer provided in this application provides a lead-out inductor integrated inside the transformer by having the lead of at least one winding pass through the through hole of the magnetic core body. This structure eliminates the need for a separate inductor core and avoids adjusting leakage inductance by significantly changing the transformer winding spacing, thereby achieving integrated inductance function and reducing the overall size and weight of the magnetic components. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the first and second windings of the transformer provided in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 2 of this application; Figure 4 This is a schematic diagram of the structure of the first and second windings of the transformer provided in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 3 of this application; Figure 6 This is a schematic diagram of the structure of the first and second windings of the transformer provided in Embodiment 3 of this application; Figure 7 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 4 of this application; Figure 8 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 5 of this application; Figure 9 This is a schematic diagram of the overall structure of the transformer provided in Embodiment Six of this application; Figure 10 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 7 of this application; Figure 11 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 8 of this application; Figure 12 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 9 of this application; Figure 13 This is a schematic diagram of the overall structure of the transformer provided in Embodiment 10 of this application; Figure 14 This is a schematic diagram of an overall structure of a transformer provided in Embodiment Eleven of this application; Figure 15 This is a schematic diagram of the structure of the first winding and the second winding of the transformer provided in Embodiment Eleven of this application; Figure 16 This is a schematic diagram of another overall structure of the transformer provided in Embodiment Eleven of this application; Figure 17 This is a schematic diagram of another structure of the first and second windings of the transformer provided in Embodiment Eleven of this application; Figure 18 This is a schematic diagram of the overall structure of the transformer provided in Embodiment Twelve of this application; Figure 19 This is a schematic diagram of the structure of the first winding and the second winding of the transformer provided in Embodiment Twelve of this application; Figure 20 This is a schematic diagram of another structure of the first and second windings of the transformer provided in Embodiment Twelve of this application; Figure 21 This is a partial structural schematic diagram of the magnetic core body of the transformer provided in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures: 100-Core body; 110-Through hole; 1101-First through hole; 1102-Second through hole; 1103-Third through hole; 1104-Fourth through hole; 1105-Fifth through hole; 1106-Sixth through hole; 120-Yoke; 130-Post; 131-First sub-post; 132-Second sub-post; 133-Center post; 140-Slot; 150-Magnetic block; 200a-First winding; 200b-Second winding; 210-Lead wire; 211-First inlet wire; 212-First outlet wire; 213-Second inlet wire; 214-Second outlet wire; 215-Third inlet wire; 216-Third outlet wire; 220-First sub-winding; 230-Second sub-winding; 300-Insulating sleeve; 310-Sleeve body; 320-Reverse wrapping structure. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] like Figures 1-2 As shown, this application embodiment provides a transformer, including: a magnetic core body 100 with at least one through hole 110; a first winding 200a and a second winding 200b respectively wound on the magnetic core body 100, wherein at least one of the first winding 200a and the second winding 200b has a lead 210 passing through the magnetic core body 100 via at least one through hole 110. Specifically, the transformer can achieve voltage boosting or bucking, or electrical isolation of input and output circuits, by adjusting the turns ratio of the primary and secondary windings. The first winding 200a and the second winding 200b are conductive coils wound on the magnetic core body 100, serving as the current carrier and the medium for electromagnetic conversion. A transformer typically includes two windings: a primary winding and a secondary winding. The primary winding, also called the primary winding, is mainly used to receive the input voltage and generate an alternating magnetic field through the current; the secondary winding, also called the secondary winding, is mainly used to induce voltage in the alternating magnetic field and output electrical energy. By controlling the different turns ratios of the primary and secondary windings in a transformer, the voltage or current can be increased or decreased. In the embodiments of this application, one of the first winding 200a and the second winding 200b is a primary winding, and the other is a secondary winding.

[0027] In this embodiment, the magnetic core body 100 is a core component of the transformer made of a high-permeability material, serving as a channel for the magnetic field. The magnetic core body 100 provides a closed magnetic circuit with low magnetic reluctance, allowing the magnetic field generated by the primary and secondary windings to be concentrated within the core body 100 for conduction, reducing leakage flux and significantly improving the electromagnetic coupling efficiency between the primary and secondary windings. It is worth noting that, depending on the transformer's application and usage scenario, the magnetic core body 100 has various structures, such as EE type, EQ type, EI type, toroidal, PQ type, and ER type structures. This embodiment primarily uses the ER type structure as an example.

[0028] It is understood that the transformer provided in this application embodiment, by opening at least one through hole 110 on the core body 100 and passing the lead 210 of one of the first winding 200a and the second winding 200b through the through hole 110, provides a high permeability path for the magnetic field generated by the current in the lead 210, so that the lead 210 generates an effective inductance. At this time, the lead 210 and the core body 100 constitute an output inductor, and the output inductor is integrated with the core body 100. This not only realizes the integration of the output inductor with the transformer, but also reduces the size and weight of the transformer.

[0029] like Figure 1 and Figure 2 As shown in this embodiment, in the first winding 200a and the second winding 200b, at least one of the leads 210 includes a first input line 211 and a first output line 212; and the first input line 211 and the first output line 212 of at least one of them pass through different through holes 110, wherein the through hole 110 through which the first input line 211 passes is a first through hole 1101, and the through hole 110 through which the first output line 212 passes is a second through hole 1102. Specifically, the main body of the first winding 200a and the second winding 200b is wound in the magnetic core body 100. The first winding 200a and the second winding 200b are connected to a power supply, load, or control chip in an external circuit through their respective leads 210. For ease of description, the first input line 211 and the first output line 212 are referred to as the leads 210 of the first winding 200a. A first through hole 1101 and a second through hole 1102 are provided on the magnetic core body 100. The first incoming line 211 and the first outgoing line 212 pass through the first through hole 1101 and the second through hole 1102 respectively, so that the first incoming line 211 and the first outgoing line 212 of the first winding 200a form an outgoing inductor with the magnetic core body 100. Furthermore, the outgoing inductor is integrated with the magnetic core body 100 of the transformer, thereby reducing the size and weight of the transformer.

[0030] It is worth noting that in some embodiments, when the first incoming line 211 and the first outgoing line 212 are the leads 210 of the second winding 200b, and only the first through hole 1101 and the second through hole 1102 are provided on the magnetic core body 100, the first incoming line 211 and the first outgoing line 212 pass through the first through hole 1101 and the second through hole 1102 respectively, so that the first incoming line 211 and the first outgoing line 212 of the second winding 200b and the magnetic core body 100 form an outgoing inductor.

[0031] It is understood that the transformer provided in this application embodiment, by opening a first through hole 1101 and a second through hole 1102 on the magnetic core body 100, and passing the first incoming line 211 and the first outgoing line 212 of either the first winding 200a or the second winding 200b through the first through hole 1101 and the second through hole 1102 respectively, achieves the integration of the outgoing line inductance with the transformer, avoids mutual interference between the first incoming line 211 and the first outgoing line 212, and also reduces the size and weight of the transformer.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the embodiment of this application, the first through hole 1101 and the second through hole 1102 are located on the same yoke 120 of the magnetic core body 100. Specifically, the magnetic core body 100 has yokes 120 disposed opposite to each other. When the first through hole 1101 and the second through hole 1102 are located on the same yoke 120 of the magnetic core body 100, the first input wire 211 and the first output wire 212 pass through the first through hole 1101 and the second through hole 1102 on the yoke 120, respectively.

[0033] It is understandable that by providing a first through hole 1101 and a second through hole 1102 on the same yoke 120 of the magnetic core body 100, the wiring arrangement of the first incoming line 211 and the first outgoing line 212 in the same direction is achieved. This satisfies the transformer's requirement for outgoing lines in the same direction in some scenarios, while also reducing the size and weight of the transformer.

[0034] like Figure 5 and Figure 6 As shown, in this embodiment of the application, the first through hole 1101 and the second through hole 1102 are respectively located on different yokes 120 of the magnetic core body 100. Specifically, the two yokes 120 on the magnetic core body 100 are arranged opposite to each other, the first through hole 1101 is located on one of the yokes 120 of the magnetic core body 100, and the second through hole 1102 is located on the other yoke 120 of the magnetic core body 100. Therefore, the first input wire 211 and the first output wire 212 pass through the magnetic core body 100 from opposite sides of the magnetic core body 100, respectively.

[0035] It is understandable that by providing a first through hole 1101 and a second through hole 1102 on the opposite upper and lower yokes 120 of the magnetic core body 100, different wiring designs for the first incoming line 211 and the first outgoing line 212 in the vertical direction are achieved. This satisfies the transformer's upper and lower outgoing line requirements in specific scenarios, avoids mutual interference between the first incoming line 211 and the first outgoing line 212, and reduces the size and weight of the transformer.

[0036] like Figure 7 and Figure 8 As shown, in some embodiments, the first through hole 1101 and the second through hole 1102 are located on the same post portion 130 of the magnetic core body 100. Specifically, the magnetic core body 100 has opposing post portions 130. When the first through hole 1101 and the second through hole 1102 are located on the same post portion 130 of the magnetic core body 100, the first incoming line 211 and the first outgoing line 212 pass through the first through hole 1101 and the second through hole 1102 on the post portion 130, respectively.

[0037] It is understood that the transformer provided in this application embodiment, by providing a first through hole 1101 and a second through hole 1102 on the same column 130 of the transformer, and passing the first input line 211 and the first output line 212 of the first winding 200a or the second winding 200b through the first through hole 1101 and the second through hole 1102 respectively, makes the lead 210 of the first winding 200a or the second winding 200b and the magnetic core body 100 form an output inductor, realizing the integration of inductor and transformer, avoiding mutual interference between the first input line 211 and the first output line 212, and reducing the size and weight of the transformer.

[0038] like Figure 8 As shown in this embodiment, the pillar portion 130 includes a first sub-pillar portion 131 and a second sub-pillar portion 132. The first sub-pillar portion 131 is connected to one yoke portion 120 of the magnetic core body 100, and the second sub-pillar portion 132 is connected to the other yoke portion 120 of the magnetic core body 100. The first sub-pillar portion 131 and the second sub-pillar portion 132 are in contact with each other. A first through hole 1101 is located on the first sub-pillar portion 131, and a second through hole 1102 is located on the second sub-pillar portion 132. Specifically, the magnetic core body 100 includes two oppositely arranged yoke portions 120 and two oppositely arranged pillar portions 130, and the two yoke portions 120 and the two pillar portions 130 are connected end to end in sequence. The transformer closes the generated magnetic field through the oppositely arranged yoke portions 120 and pillar portions 130, forming a complete magnetic circuit loop. Each pillar portion 130 is formed by the contact of the first sub-pillar portion 131 and the second sub-pillar portion 132. The first through hole 1101 can be provided on any one of the first sub-pillars 131, and the second through hole 1102 can be provided on any one of the second sub-pillars 132.

[0039] Understandably, by using a symmetrically designed yoke 120 and pillar 130, with the pillar 130 consisting of a first sub-pillar 131 and a second sub-pillar 132, the pillar 130 can balance the forces on the magnetic core body 100 and reduce magnetic leakage. Simultaneously, by placing the first through-hole 1101 and the second through-hole 1102 on either the first sub-pillar 131 or the second sub-pillar 132, not only is the integration of the resonant inductor and the transformer achieved, avoiding mutual interference between the first input line 211 and the first output line 212, but the size and weight of the transformer are also reduced, meeting the needs of various transformer applications.

[0040] like Figure 9 As shown in this embodiment, the first through hole 1101 is located on any one of the yoke portions 120 of the magnetic core body 100, and the second through hole 1102 is located on any one of the pillar portions 130 of the magnetic core body 100. Specifically, the magnetic core body 100 has two opposing pillar portions 130, each of which includes a first sub-pillar portion 131 and a second sub-pillar portion 132. The second through hole 1102 can be disposed on the first sub-pillar portion 131 or the second sub-pillar portion 132 of one of the pillar portions 130; or, the second through hole 1102 can be disposed on the first sub-pillar portion 131 or the second sub-pillar portion 132 of the other pillar portion 130.

[0041] Understandably, by providing a first through hole 1101 on any yoke 120 of the magnetic core body 100 and second through holes 1102 on multiple sub-pillars, different wiring configurations for the first incoming line 211 and the first outgoing line 212 in the vertical and horizontal directions are achieved. This satisfies the transformer's outgoing line requirements in specific scenarios, avoids mutual interference between the first incoming line 211 and the first outgoing line 212, and reduces the size and weight of the transformer.

[0042] like Figure 1 , Figure 7 and Figure 10 As shown in this embodiment, there is a gap between the first through hole 1101 and the second through hole 1102, and the size of the gap is configured to adjust the inductance value and / or leakage inductance value. Specifically, when the first input wire 211 and the first output wire 212 of the first winding 200a pass through the first through hole 1101 and the second through hole 1102 respectively, the lead wire 210 of the first winding 200a and the magnetic core body 100 constitute an output inductor, and the output inductor is integrated with the magnetic core body 100 and can act as a resonant inductor. The distance between the first input wire 211 and the first output wire 212 can affect the inductance value / leakage inductance value of the resonant inductor.

[0043] It is worth noting that, such as Figure 7As shown, by increasing the spacing between the first through hole 1101 and the second through hole 1102, the cross-sectional area of ​​the magnetic core body 100 between the first input line 211 and the first output line 212 can be increased, thereby increasing the leakage inductance value of the resonant inductor. Figure 10 As shown, by reducing the gap between the first through hole 1101 and the second through hole 1102, the cross-sectional area of ​​the magnetic core body 100 between the first input line 211 and the first output line 212 can be reduced, thereby reducing the leakage inductance value of the resonant inductor.

[0044] like Figure 11 As shown in the embodiment of this application, a slot 140 is provided between the first through hole 1101 and the second through hole 1102, and the slot 140 is disposed on the magnetic core body 100. Specifically, by providing a slot 140 on the magnetic core body 100 between the first through hole 1101 and the second through hole 1102, the cross-sectional area of ​​the magnetic core body 100 between the first input line 211 and the first output line 212 can be reduced, thereby reducing the inductance value between the first input line 211 and the first output line 212. It is worth noting that the two ends of the slot 140 are not connected to the first through hole 1101 and the second through hole 1102, and the shape of the slot 140 is not limited to the rectangular structure in this application, but can also be a square, circle, ellipse, or rounded rectangle, etc. The specific shape can be selected according to the actual situation, and this embodiment of the application will not list more examples here.

[0045] It is understandable that, in order to reduce the inductance value of the magnetic core body 100 between the first input line 211 and the first output line 212, removing a portion of the magnetic core body 100 between the first input line 211 and the first output line 212 can not only reduce the inductance value of the resonant inductor, but also reduce the weight of the transformer.

[0046] like Figure 12 As shown in this embodiment, one end of the slot 140 is connected to the first through hole 1101, and the other end of the slot 140 is connected to the second through hole 1102. Specifically, connecting both ends of the slot 140 to the first through hole 1101 and the second through hole 1102 respectively can reduce the cross-sectional area of ​​the magnetic core body 100 between the first input line 211 and the first output line 212, while increasing the magnetic resistance of the output line and reducing the inductance value of the resonant inductor between the first input line 211 and the first output line 212.

[0047] It should be noted that the embodiments of this application provide a slot 140 on the yoke 120 of the core body 100. In some other embodiments of this application, the slot 140 can also be provided on the post 130 of the core body 100, and the slot 140 is located on the core body 100 between the first through hole 1101 and the second through hole 1102. When the first through hole 1101 and the second through hole 1102 are located on different yokes 120 or post 130s, the specific location of the slot 140 can be arranged in various ways according to the application scenario of the transformer, and this application will not provide further examples here.

[0048] It is understandable that by setting a slot 140 on the magnetic core body 100 between the first through hole 1101 and the second through hole 1102, and utilizing the characteristic that the permeability of air is much lower than that of the magnetic core body 100, the total magnetic resistance of the magnetic circuit on the first input line 211 and the first output line 212 is increased, the magnetic flux of the first winding 200a is reduced, and the magnetic linkage of the first winding 200a is reduced, thereby ultimately achieving the purpose of reducing the output inductance.

[0049] like Figure 13 As shown in this embodiment, a magnetic block 150 is provided between the first through hole 1101 and the second through hole 1102, and the magnetic block 150 is attached to the magnetic core body 100. Specifically, when the magnetic block 150 is provided on the magnetic core body 100 between the first through hole 1101 and the second through hole 1102, the magnetic block 150 can increase the cross-sectional area of ​​the magnetic core body 100 between the first input line 211 and the first output line 212, thereby enhancing the magnetic field of the magnetic core body 100 and reducing the inductance between the first input line 211 and the first output line 212.

[0050] It is understandable that adding an additional magnetic block 150 to the core body 100 between the first incoming line 211 and the first outgoing line 212 of the first winding 200a can increase the cross-sectional area of ​​the core body 100, reduce magnetic field leakage, and allow more magnetic fields to bind to the first winding 200a, thereby increasing the outgoing line inductance.

[0051] like Figure 14 , Figure 15 , Figure 16 and Figure 17As shown in the embodiment of this application, at least one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 arranged in parallel. The lead wire 210 of the first sub-winding 220 includes a second incoming wire 213 and a second outgoing wire 214. The lead wire 210 of the second sub-winding 230 includes a third incoming wire 215 and a third outgoing wire 216. The second incoming wire 213 and the third incoming wire 215 pass through the same through hole 110 and are wound in opposite directions on the portion of the magnetic core body 100 located on one side of the through hole 110, and the through hole 110 is a third through hole 1103. The second outgoing wire 214 and the third outgoing wire 216 pass through the same through hole 110 and are wound in opposite directions on the portion of the magnetic core body 100 located on one side of the through hole 110, and the through hole 110 is a fourth through hole 1104. Specifically, a third through hole 1103 is provided on one of the yokes 120 of the magnetic core body 100, and a fourth through hole 1104 is provided on the other yoke 120. When the first winding 200a includes a first sub-winding 220 and a second sub-winding 230 arranged in parallel, the second incoming wire 213 and the third incoming wire 215 pass through the third through hole 1103 together, and the second outgoing wire 214 and the third outgoing wire 216 pass through the fourth through hole 1104 together. The second incoming wire 213 enters the third through hole 1103 from the outside of the magnetic core body 100, and the second incoming wire 213 is wound around the magnetic core body 100 located at the edge of the third through hole 1103 in one clock direction (such as clockwise); the third incoming wire 215 exits the third through hole 1103 from the inside of the magnetic core body 100, and the third incoming wire 215 is wound around the magnetic core body 100 located at the edge of the third through hole 1103 in another clock direction (such as counterclockwise). The second incoming line 213 and the third incoming line 215 are wound at least one turn.

[0052] Similarly, the second lead 214 passes through the fourth through hole 1104 from the outside of the magnetic core body 100, and the second lead 214 is wound around the magnetic core body 100 located at the edge of the fourth through hole 1104 in one clock direction (such as clockwise); the third lead 216 passes through the fourth through hole 1104 from the inside of the magnetic core body 100, and the third lead 216 is wound around the magnetic core body 100 located at the edge of the fourth through hole 1104 in another clock direction (such as counterclockwise). The second lead 214 and the third lead 216 are wound at least one turn.

[0053] like Figure 14 and Figure 15As shown in the embodiment of this application, at least one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 arranged in parallel. The lead 210 of the first sub-winding 220 includes a second incoming line 213 and a second outgoing line 214, and the lead 210 of the second sub-winding 230 includes a third incoming line 215 and a third outgoing line 216. The second incoming line 213 and the third incoming line 215 pass through the same through hole 110 and are wound in opposite directions on the portion of the magnetic core body 100 located on one side of the through hole 110, which is a third through hole 1103. Specifically, the third through hole 1103 is provided on one of the yoke portions 120 of the magnetic core body 100. When the first winding 200a includes the first sub-winding 220 and the second sub-winding 230 arranged in parallel, the second incoming line 213 and the third incoming line 215 both pass through the third through hole 1103. The second incoming wire 213 enters the third through-hole 1103 from the outside of the magnetic core body 100, and the second incoming wire 213 is wound around the magnetic core body 100 located at the edge of the third through-hole 1103 along one clock direction (such as clockwise); the third incoming wire 215 exits the third through-hole 1103 from the inside of the magnetic core body 100, and the third incoming wire 215 is wound around the magnetic core body 100 located at the edge of the third through-hole 1103 along another clock direction (such as counterclockwise). The second incoming wire 213 and the third incoming wire 215 are wound at least one turn.

[0054] like Figure 16 and Figure 17As shown in the embodiment of this application, at least one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 arranged in parallel. The lead 210 of the first sub-winding 220 includes a second incoming line 213 and a second outgoing line 214, and the lead 210 of the second sub-winding 230 includes a third incoming line 215 and a third outgoing line 216. The second outgoing line 214 and the third outgoing line 216 pass through the same through hole 110 and are wound in opposite directions around the portion of the magnetic core body 100 located on one side of the through hole 110 at least one turn. The through hole 110 is a fourth through hole 1104. Specifically, the fourth through hole 1104 is provided on another yoke 120 of the magnetic core body 100. When the first winding 200a includes the first sub-winding 220 and the second sub-winding 230 arranged in parallel, the second outgoing line 214 and the third outgoing line 216 both pass through the fourth through hole 1104. The second lead wire 214 enters the fourth through hole 1104 from the outside of the magnetic core body 100, and the second lead wire 214 is wound around the magnetic core body 100 located at the edge of the fourth through hole 1104 in one clock direction (such as clockwise); the third lead wire 216 exits the fourth through hole 1104 from the inside of the magnetic core body 100, and the third lead wire 216 is wound around the magnetic core body 100 located at the edge of the fourth through hole 1104 in another clock direction (such as counterclockwise). The second lead wire 214 and the third lead wire 216 are wound at least one turn.

[0055] It should be noted that when the first winding 200a is energized, the current will generate a ring-shaped magnetic field around the lead 210. If the second incoming wire 213 and the third incoming wire 215 or the second outgoing wire 214 and the third outgoing wire 216 are wound in the same direction, the magnetic fields they generate will be superimposed and enhanced at the yoke 120 where the third through hole 1103 or the fourth through hole 1104 is located; however, by winding in opposite directions, the magnetic fields generated between the leads 210 can cancel each other out. Therefore, the winding directions of the second incoming wire 213 and the third incoming wire 215 or the second outgoing wire 214 and the third outgoing wire 216 need to be kept in opposite directions, and the number of turns should be consistent.

[0056] It is understandable that by winding the incoming and / or outgoing wires of the first sub-winding 220 and the second sub-winding 230, which are set in parallel, in opposite directions, the magnetic fields generated between the leads 210 can be canceled out, thereby preventing the yoke 120 from experiencing magnetic saturation and magnetic interference due to the superposition of local magnetic fields. At the same time, it can prevent the magnetic field of the leads 210 from occupying the magnetic channel of the yoke 120 and destroying the symmetry of the magnetic circuit, thereby ensuring the stable and efficient operation of the transformer's magnetic circuit.

[0057] like Figure 18 and Figure 19As shown in the embodiment of this application, at least one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 connected in series. The lead 210 of the first sub-winding 220 includes a second incoming line 213 and a second outgoing line 214, and the lead 210 of the second sub-winding 230 includes a third incoming line 215 and a third outgoing line 216. The second outgoing line 214 and the third incoming line 215 are connected in series. The second incoming line 213 and the third incoming line 215 both pass through a through hole 110, which is a fifth through hole 1105. The second outgoing line 214 and the third outgoing line 216 both pass through another through hole 110, which is a sixth through hole 1106. Specifically, the fifth through hole 1105 and the sixth through hole 1106 are provided on any one of the yokes 120 of the magnetic core body 100. When the first winding 200a includes a first sub-winding 220 and a second sub-winding 230 connected in series, the second incoming line 213 of the first sub-winding 220 and the third incoming line 215 of the second sub-winding 230 both pass through the fifth through hole 1105, and the second outgoing line 214 of the first sub-winding 220 and the third outgoing line 216 of the second sub-winding 230 both pass through the sixth through hole 1106. Furthermore, the second outgoing line 214 is connected to the third incoming line 215. It is worth noting that the first winding 200a can be either the primary winding or the secondary winding of a transformer.

[0058] like Figure 18 and Figure 20 As shown in the embodiment of this application, at least one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 connected in series. The lead 210 of the first sub-winding 220 includes a second incoming line 213 and a second outgoing line 214, and the lead 210 of the second sub-winding 230 includes a third incoming line 215 and a third outgoing line 216. The second outgoing line 214 and the third incoming line 215 are connected in series. The second incoming line 213 and the third incoming line 215 both pass through a through hole 110, which is a fifth through hole 1105. The second outgoing line 214 and the third outgoing line 216 both pass through another through hole 110, which is a sixth through hole 1106. Specifically, the fifth through hole 1105 and the sixth through hole 1106 are provided on any one of the yokes 120 of the magnetic core body 100. When the second winding 200b includes a first sub-winding 220 and a second sub-winding 230 connected in series, the second incoming line 213 of the first sub-winding 220 and the third incoming line 215 of the second sub-winding 230 both exit through the fifth through hole 1105, and the second outgoing line 214 of the first sub-winding 220 and the third outgoing line 216 of the second sub-winding 230 both exit through the sixth through hole 1106. Furthermore, the second outgoing line 214 is connected to the third incoming line 215. It is worth noting that the second winding 200b can be either the primary winding or the secondary winding of a transformer.

[0059] It is understandable that by setting two layers of coils to increase the total number of turns of the first winding 200a or the second winding 200b, the inductance value is increased. At the same time, by connecting the first sub-winding 220 to the second sub-winding 230, the effective utilization rate of the number of turns is improved, and the inductance efficiency is avoided. Ultimately, the goal of significantly improving the inductance value and ensuring reliable performance is achieved. This is suitable for scenarios that require high inductance values ​​and inductance stability.

[0060] like Figure 21 As shown in this embodiment, the transformer further includes at least one winding post connected to the core body 100. Each winding post consists of two opposing central pillars 133, with one end of each central pillar 133 in contact with the other end, which is connected to the inner sides of two yokes 120 respectively. A first winding 200a and / or a second winding 200b are wound around the winding post. Specifically, the winding post is a columnar structure on the core body 100 specifically designed for winding the coil. Its main function is to provide a fixed carrier for the winding and guide the magnetic field to concentrate, thereby maximizing the magnetic coupling efficiency between the winding and the core body 100. The columnar shape of the winding post allows the wires to be wound in an orderly manner, preventing loose or misaligned wires, ensuring accurate and uniform turn counts, and simultaneously bearing the weight of the winding and vibrations during operation, maintaining the overall structural reliability.

[0061] In this embodiment, the transformer has only one winding post, and the first winding 200a and the second winding 200b are wound on the same winding post, thereby concentrating the magnetic circuit. The magnetic field generated by the first winding 200a is almost entirely transmitted to the second winding 200b through the winding post. The second winding 200b can efficiently induce voltage with very little leakage flux, thus resulting in minimal leakage inductance and improved energy transfer efficiency.

[0062] In some embodiments, the transformer has two winding posts, namely a first winding post and a second winding post. The first winding 200a is wound on the first winding post, and the second winding 200b is wound on the second winding post. The first winding 200a and the second winding 200b are physically far apart, which greatly reduces the parasitic capacitance between them, making it difficult for high-frequency interference to be transmitted across the windings, and thus providing strong anti-interference capability.

[0063] Understandably, depending on the application scenario of the transformer, one or more winding posts are set in the transformer so that the first winding 200a and the second winding 200b are wound on the same winding post in some cases, thereby concentrating the magnetic circuit, reducing leakage flux, and improving energy transfer efficiency; or the first winding 200a and the second winding 200b are wound on different winding posts respectively, thereby reducing the parasitic capacitance between the first winding 200a and the second winding 200b and improving the anti-interference capability.

[0064] like Figures 1 to 21As shown in the embodiment of this application, one of the first winding 200a and the second winding 200b includes a first sub-winding 220 and a second sub-winding 230, and the lead 210 of the other includes a first input line 211 and a first output line 212, which are disposed in different through holes 110. Specifically, when the first winding 200a includes the first sub-winding 220 and the second sub-winding 230, the lead 210 of the second winding 200b includes the first input line 211 and the first output line 212, and the first input line 211 and the first output line 212 respectively pass through the first through hole 1101 and the second through hole 1102 provided on the magnetic core body 100. The first through hole 1101 can be provided on any yoke 120 or any sub-pillar of the magnetic core body 100; the second through hole 1102 can be provided on any yoke 120 or any sub-pillar of the magnetic core body 100. When the second winding 200b includes a first sub-winding 220 and a second sub-winding 230, the lead 210 of the first winding 200a includes a first incoming line 211 and a first outgoing line 212, and the first incoming line 211 and the first outgoing line 212 respectively pass through the first through hole 1101 and the second through hole 1102 provided on the magnetic core body 100. The first through hole 1101 can be provided on any yoke 120 or any sub-pillar of the magnetic core body 100; the second through hole 1102 can be provided on any yoke 120 or any sub-pillar of the magnetic core body 100.

[0065] It is understandable that when the lead 210 of either the first winding 200a or the second winding 200b passes through the core body 100 through the scheme provided in any of the above embodiments, the lead 210 of the other winding can also pass through the core body 100 through the scheme provided in any of the above embodiments, thereby realizing the integration of the output inductor with the transformer, and also reducing the size and weight of the transformer, and expanding the application scenarios of the transformer.

[0066] like Figure 2 , Figure 4 , Figure 6 , Figure 15 , Figure 17 , Figure 18 and Figure 20 As shown in the embodiment of this application, in the first sub-winding 220 and the second sub-winding 230, one is sleeved on the outer periphery of the other. Specifically, the first sub-winding 220 is sleeved on the outer periphery of the second sub-winding 230, or the second sub-winding 230 is sleeved on the outer periphery of the first sub-winding 220.

[0067] Understandably, by connecting the first sub-winding 220 and the second sub-winding 230 together, the internal space of the core body 100 is reduced, thereby shrinking the size of the transformer and expanding its application scenarios.

[0068] like Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown in this embodiment, the transformer further includes an insulating bushing 300, which is disposed in the through hole 110 and surrounds the lead 210 passing through the through hole 110. Specifically, to suppress leakage flux, the transformer core body 100 is typically connected to the equipment casing, grounding terminal, or other circuit structures. If the lead 210 directly passes through the through hole 110 and contacts the core body 100, it will cause the lead 210 to conduct with the core body 100, resulting in a short circuit fault. By providing an insulating bushing 300 on the inner wall of the through hole 110, direct contact between the lead 210 and the core body 100 can be physically blocked, completely isolating the electrical connection between the two, fundamentally avoiding short circuits, and ensuring the basic safety of the circuit and equipment. Furthermore, the surface of the lead wire 210 is usually coated with insulating varnish. However, during installation or long-term use, the insulating varnish may be damaged due to friction when the lead wire 210 passes through the through hole 110. Simultaneously, if the copper core of the lead wire 210 directly contacts the magnetic core body 100, moisture and dust from the environment may enter through the contact gaps, leading to oxidation and corrosion of the magnetic core body 100 or the lead wire 210. The insulating sleeve 300 can cover the portion of the lead wire 210 that passes through the through hole 110, preventing the insulating varnish of the lead wire 210 from being scratched by the edge of the magnetic core body 100 and isolating external impurities from contacting the magnetic core body 100 and the lead wire 210. If the magnetic core body 100 is corroded, its permeability will decrease (magnetic reluctance will increase), leading to a decrease in winding inductance and an increase in energy loss; corrosion of the lead wire 210 will result in increased contact resistance and severe overheating.

[0069] It is understandable that the purpose of setting the insulating sleeve 300 in the through hole 110 is to provide insulation protection and safety assurance. On the one hand, it prevents short circuits and meets insulation standards through electrical isolation, which is the basis for the safe operation of the equipment. On the other hand, it avoids losses between the magnetic core body 100 and the lead wire 210 through physical protection, ensuring the stability of core performance such as inductance. Especially in electrical equipment with high voltage, high power or harsh environment, setting the insulating sleeve 300 in the through hole 110 can improve safety.

[0070] like Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 9As shown in this embodiment, the insulating sleeve 300 is provided with a reverse wrapping structure 320, which is disposed on the outer surface of the magnetic core body 100 and surrounds the through hole 110. Specifically, the insulating sleeve 300 includes a sleeve body 310 and a reverse wrapping structure 320, with the reverse wrapping structure 320 connected to one end of the sleeve body 310. The sleeve body 310 is located in the through hole 110 and fits against the inner wall of the through hole 110. The reverse wrapping structure 320 is located at the edge of the through hole 110. When the sleeve body 310 is fitted and connected to the through hole 110, the reverse wrapping structure 320 covers part of the structure of the magnetic core body 100 at the edge of the through hole 110. When the through hole 110 is provided in the yoke 120, the reverse wrapping structure 320 covers part of the yoke 120 around the through hole 110; when the through hole 110 is provided in the post 130, the reverse wrapping structure 320 covers part of the post 130 around the through hole 110.

[0071] It is understandable that by setting a reverse wrapping structure 320 at one end of the sleeve body 310, when the insulating sleeve 300 is connected to the through hole 110, it can not only isolate the lead wire 210 from the hole wall of the through hole 110, but also isolate the lead wire 210 from the outer part of the magnetic core body 100 by covering the magnetic core body 100 around the through hole 110. This prevents the incoming or outgoing wire of the winding from contacting the magnetic core body 100 after bending during winding or use, thus playing a role in insulation and protection.

[0072] This application provides an electrical device, including a transformer as described in any of the above embodiments. The working principle and beneficial effects of the transformer provided in this application have been described in detail in the above embodiments, and will not be repeated here.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A transformer, characterized in that, include: The magnetic core body (100) has at least one through hole (110). The first winding (200a) and the second winding (200b) are respectively wound on the magnetic core body (100). At least one of the first winding (200a) and the second winding (200b) has a lead (210) passing through the magnetic core body (100) through at least one of the through holes (110).

2. The transformer according to claim 1, characterized in that, In the first winding (200a) and the second winding (200b), at least one of the leads (210) includes a first incoming line (211) and a first outgoing line (212); and the first incoming line (211) and the first outgoing line (212) of at least one of them are passed through different through holes (110), wherein the through hole (110) through which the first incoming line (211) passes is a first through hole (1101), and the through hole (110) through which the first outgoing line (212) passes is a second through hole (1102).

3. The transformer according to claim 2, characterized in that, The first through hole (1101) and the second through hole (1102) are located on the same yoke (120) of the magnetic core body (100) or on the same pillar (130) of the magnetic core body (100).

4. The transformer according to claim 3, characterized in that, There is a gap between the first through hole (1101) and the second through hole (1102), the size of which is configured to adjust the inductance value and / or leakage inductance value.

5. The transformer according to claim 3, characterized in that, A slot (140) is provided between the first through hole (1101) and the second through hole (1102), and the slot (140) is provided on the magnetic core body (100).

6. The transformer according to claim 5, characterized in that, One end of the slot (140) is connected to the first through hole (1101), and the other end of the slot (140) is connected to the second through hole (1102).

7. The transformer according to claim 3, characterized in that, A magnetic block (150) is provided between the first through hole (1101) and the second through hole (1102), and the magnetic block (150) is attached to the magnetic core body (100).

8. The transformer according to claim 1, characterized in that, In the first winding (200a) and the second winding (200b), at least one includes a first sub-winding (220) and a second sub-winding (230) arranged in parallel. The lead (210) of the first sub-winding (220) includes a second incoming line (213) and a second outgoing line (214). The lead (210) of the second sub-winding (230) includes a third incoming line (215) and a third outgoing line (216). The second incoming line (213) and the third incoming line (215) pass through the same through hole (110) and are wound around the magnetic core body (100) at least once on the side of the through hole (110) in opposite directions, the through hole (110) being the third through hole (1103); and / or, the second outgoing line (214) and the third outgoing line (216) pass through the same through hole (110) and are wound around the magnetic core body (100) at least once on the side of the through hole (110) in opposite directions, the through hole (110) being the fourth through hole (1104).

9. The transformer according to claim 1, characterized in that, In the first winding (200a) and the second winding (200b), at least one includes a first sub-winding (220) and a second sub-winding (230) connected in series. The lead (210) of the first sub-winding (220) includes a second incoming line (213) and a second outgoing line (214). The lead (210) of the second sub-winding (230) includes a third incoming line (215) and a third outgoing line (216). The second outgoing line (214) and the third incoming line (215) are connected in series; the second incoming line (213) and the third incoming line (215) both pass through a through hole (110), which is the fifth through hole (1105); the second outgoing line (214) and the third outgoing line (216) both pass through another through hole (110), which is the sixth through hole (1106).

10. The transformer according to claim 8 or 9, characterized in that, One of the first winding (200a) and the second winding (200b) includes the first sub-winding (220) and the second sub-winding (230), and the lead (210) of the other includes the first incoming line (211) and the first outgoing line (212), which are passed through different through holes (110).

11. The transformer according to claim 8 or 9, characterized in that, In the first sub-winding (220) and the second sub-winding (230), one is fitted around the outer periphery of the other.

12. The transformer according to any one of claims 1 to 9, characterized in that, The transformer also includes an insulating bushing (300), which is disposed in the through hole (110) and surrounds the lead wire (210) passing through the through hole (110).

13. The transformer according to claim 12, characterized in that, The insulating sleeve (300) is provided with a reverse wrapping structure (320), which is disposed on the outer surface of the magnetic core body (100) and surrounds the through hole (110).

14. An electrical device, characterized in that, The transformer includes any one of claims 1 to 13.

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